update scripts
Zhang Peng
parent
1072e77e75
commit
7d1ce36b6e
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@ -23,6 +23,7 @@ insert_final_newline = true
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end_of_line = crlf
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[*.{java, sh}]
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indent_style = tab
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indent_size = 4
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[*.md]
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@ -20,9 +20,9 @@ echo ${str3}_${str4}
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################### 获取字符串长度 ###################
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text="12345"
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echo ${#text}
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echo "${text} length is: ${#text}"
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# Output:
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# 5
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# 12345 length is: 5
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################### 获取字符串长度 ###################
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text="12345"
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@ -37,13 +37,14 @@ echo `expr index "${text}" ll`
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# 3
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################### 截取关键字左边内容 ###################
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str="feature/1.0.0"
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branch=`echo ${str#feature/}`
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full_branch="feature/1.0.0"
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branch=`echo ${full_branch#feature/}`
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echo "branch is ${branch}"
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################### 截取关键字右边内容 ###################
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key=`echo ${str%/1.0.0}`
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echo "key is ${key}"
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full_version="0.0.1-SNAPSHOT"
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version=`echo ${full_version%-SNAPSHOT}`
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echo "version is ${version}"
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################### 判断字符串中是否包含子字符串 ###################
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result=$(echo "${str}" | grep "feature/")
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@ -3,7 +3,7 @@
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################### 声明变量 ###################
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name="world"
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echo "hello ${name}"
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# Output: hello
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# Output: hello world
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################### 只读变量 ###################
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rword="hello"
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@ -1,22 +0,0 @@
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#!/usr/bin/env bash
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################### 声明变量 ###################
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name="world"
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echo "hello ${name}"
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# Output: hello world
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################### 只读变量 ###################
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readonly_var="hello"
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echo ${readonly_var}
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# Output: hello
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readonly readonly_var
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# rword="bye" # 如果放开注释，执行时会报错
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################### 删除变量 ###################
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dword="hello" # 声明变量
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echo ${dword} # 输出变量值
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# Output: hello
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unset dword # 删除变量
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echo ${dword}
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# Output: （空）
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@ -1,4 +0,0 @@
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#!/usr/bin/env bash
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folder=$(pwd)
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echo "current path: ${folder}"
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@ -1,5 +0,0 @@
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#!/bin/bash
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echo "User info fro userId:$USER"
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echo UID:$UID
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echo HOME:$HOME
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@ -1,8 +0,0 @@
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#!/usr/bin/env bash
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days=10
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guest="Katie"
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echo "$guest logged in $days days age"
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guest="Katie2"
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days=5
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echo "$guest logged in $days days age"
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@ -0,0 +1,56 @@
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#!/usr/bin/env bash
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################### 声明变量 ###################
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name="world"
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echo "hello ${name}"
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# Output: hello world
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################### 输出变量 ###################
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folder=$(pwd)
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echo "current path: ${folder}"
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################### 只读变量 ###################
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rword="hello"
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echo ${rword}
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# Output: hello
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readonly rword
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# rword="bye" # 如果放开注释，执行时会报错
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################### 删除变量 ###################
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dword="hello" # 声明变量
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echo ${dword} # 输出变量值
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# Output: hello
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unset dword # 删除变量
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echo ${dword}
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# Output: （空）
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################### 系统变量 ###################
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echo "UID:$UID"
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echo LOGNAME:$LOGNAME
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echo User:$USER
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echo HOME:$HOME
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echo PATH:$PATH
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echo HOSTNAME:$HOSTNAME
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echo SHELL:$SHELL
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echo LANG:$LANG
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################### 自定义变量 ###################
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days=10
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user="admin"
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echo "$user logged in $days days age"
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days=5
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user="root"
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echo "$user logged in $days days age"
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# Output:
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# admin logged in 10 days age
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# root logged in 5 days age
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################### 从变量读取列表 ###################
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colors="Red Yellow Blue"
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colors=$colors" White Black"
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for color in $colors
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do
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echo " $color"
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done
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@ -0,0 +1,107 @@
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#!/usr/bin/env bash
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################### 使用单引号拼接字符串 ###################
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name1='white'
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str1='hello, '${name1}''
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str2='hello, ${name1}'
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echo ${str1}_${str2}
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# Output:
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# hello, white_hello, ${name1}
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################### 使用双引号拼接字符串 ###################
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name2="black"
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str3="hello, "${name2}""
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str4="hello, ${name2}"
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echo ${str3}_${str4}
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# Output:
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# hello, black_hello, black
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################### 获取字符串长度 ###################
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text="12345"
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echo "${text} length is: ${#text}"
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# Output:
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# 12345 length is: 5
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# 获取子字符串
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text="12345"
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echo ${text:2:2}
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# Output:
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# 34
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################### 查找子字符串 ###################
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text="hello"
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echo `expr index "${text}" ll`
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# Output:
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# 3
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################### 判断字符串中是否包含子字符串 ###################
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result=$(echo "${str}" | grep "feature/")
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if [[ "$result" != "" ]]; then
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echo "feature/ 是 ${str} 的子字符串"
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else
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echo "feature/ 不是 ${str} 的子字符串"
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fi
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################### 截取关键字左边内容 ###################
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full_branch="feature/1.0.0"
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branch=`echo ${full_branch#feature/}`
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echo "branch is ${branch}"
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################### 截取关键字右边内容 ###################
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full_version="0.0.1-SNAPSHOT"
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version=`echo ${full_version%-SNAPSHOT}`
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echo "version is ${version}"
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################### 字符串分割成数组 ###################
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str="0.0.0.1"
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OLD_IFS="$IFS"
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IFS="."
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array=( ${str} )
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IFS="$OLD_IFS"
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size=${#array[*]}
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lastIndex=`expr ${size} - 1`
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echo "数组长度：${size}"
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echo "最后一个数组元素：${array[${lastIndex}]}"
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for item in ${array[@]}
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do
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echo "$item"
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done
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################### 判断字符串是否为空 ###################
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#-n 判断长度是否非零
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#-z 判断长度是否为零
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str=testing
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str2=''
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if [[ -n "$str" ]]
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then
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echo "The string $str is not empty"
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else
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echo "The string $str is empty"
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fi
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if [[ -n "$str2" ]]
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then
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echo "The string $str2 is not empty"
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else
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echo "The string $str2 is empty"
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fi
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# Output:
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# The string testing is not empty
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# The string is empty
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################### 字符串比较 ###################
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str=hello
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str2=world
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if [[ $str = "hello" ]]; then
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echo "str equals hello"
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else
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echo "str not equals hello"
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fi
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if [[ $str2 = "hello" ]]; then
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echo "str2 equals hello"
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else
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echo "str2 not equals hello"
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fi
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@ -1,14 +1,14 @@
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#!/usr/bin/env bash
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# 创建数组
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################### 创建数组 ###################
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nums=( [ 2 ] = 2 [ 0 ] = 0 [ 1 ] = 1 )
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colors=( red yellow "dark blue" )
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# 访问数组的单个元素
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################### 访问数组的单个元素 ###################
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echo ${nums[1]}
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# Output: 1
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# 访问数组的所有元素
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################### 访问数组的所有元素 ###################
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echo ${colors[*]}
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# Output: red yellow dark blue
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@ -32,23 +32,23 @@ printf "+ %s\n" "${colors[@]}"
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# + yellow
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# + dark blue
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# 访问数组的部分元素
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################### 访问数组的部分元素 ###################
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echo ${nums[@]:0:2}
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# Output:
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# 0 1
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# 访问数组长度
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################### 获取数组长度 ###################
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echo ${#nums[*]}
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# Output:
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# 3
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# 向数组中添加元素
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################### 向数组中添加元素 ###################
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colors=( white "${colors[@]}" green black )
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echo ${colors[@]}
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# Output:
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# white red yellow dark blue green black
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# 从数组中删除元素
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################### 从数组中删除元素 ###################
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unset nums[ 0 ]
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echo ${nums[@]}
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# Output:
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@ -1,19 +0,0 @@
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#!/usr/bin/env bash
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# ----------------------------------------------------------------------------------
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# 根据特定字符将一个字符串分割成数组
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# ----------------------------------------------------------------------------------
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str="0.0.0.1"
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OLD_IFS="$IFS"
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IFS="."
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array=( ${str} )
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IFS="$OLD_IFS"
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size=${#array[*]}
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lastIndex=`expr ${size} - 1`
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echo "数组长度：${size}"
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echo "最后一个数组元素：${array[${lastIndex}]}"
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for item in ${array[@]}
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do
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echo "$item"
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done
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@ -1,55 +0,0 @@
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#!/usr/bin/env bash
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################### 单引号和双引号 ###################
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################### 拼接字符串 ###################
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# 使用单引号拼接
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name1='white'
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str1='hello, '${name1}''
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str2='hello, ${name1}'
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echo ${str1}_${str2}
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# Output:
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# hello, white_hello, ${name1}
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# 使用双引号拼接
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name2="black"
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str3="hello, "${name2}""
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str4="hello, ${name2}"
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echo ${str3}_${str4}
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# Output:
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# hello, black_hello, black
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################### 获取字符串长度 ###################
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text="12345"
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echo "${text} length is: ${#text}"
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# Output:
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# 12345 length is: 5
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################### 获取字符串长度 ###################
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text="12345"
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echo ${text:2:2}
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# Output:
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# 34
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################### 查找子字符串 ###################
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text="hello"
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echo `expr index "${text}" ll`
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# Output:
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# 3
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################### 截取关键字左边内容 ###################
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full_branch="feature/1.0.0"
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branch=`echo ${full_branch#feature/}`
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echo "branch is ${branch}"
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################### 截取关键字右边内容 ###################
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full_version="0.0.1-SNAPSHOT"
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version=`echo ${full_version%-SNAPSHOT}`
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echo "version is ${version}"
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################### 判断字符串中是否包含子字符串 ###################
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result=$(echo "${str}" | grep "feature/")
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if [[ "$result" != "" ]]; then
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echo "feature/ 是 ${str} 的子字符串"
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else
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echo "feature/ 不是 ${str} 的子字符串"
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fi
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@ -0,0 +1,52 @@
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#!/usr/bin/env bash
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x="abc"
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if [[ -n $1 ]]; then
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x=$1
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fi
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y="xyz"
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if [[ -n $2 ]]; then
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y=$2
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fi
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echo "x=${x}, y=${y}"
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if [[ ${x} = ${y} ]]; then
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echo "${x} = ${y} : x 等于 y"
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else
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echo "${x} = ${y}: x 不等于 y"
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fi
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if [[ ${x} != ${y} ]]; then
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echo "${x} != ${y} : x 不等于 y"
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else
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echo "${x} != ${y}: x 等于 y"
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fi
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if [[ -z ${x} ]]; then
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echo "-z ${x} : 字符串长度为 0"
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else
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echo "-z ${x} : 字符串长度不为 0"
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fi
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if [[ -n "${x}" ]]; then
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echo "-n ${x} : 字符串长度不为 0"
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else
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echo "-n ${x} : 字符串长度为 0"
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fi
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if [[ ${x} ]]; then
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echo "${x} : 字符串不为空"
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else
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echo "${x} : 字符串为空"
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fi
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# Execute: ./operator-demo5.sh
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# Output:
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# x=abc, y=xyz
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# abc = xyz: x 不等于 y
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# abc != xyz : x 不等于 y
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# -z abc : 字符串长度不为 0
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# -n abc : 字符串长度不为 0
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# abc : 字符串不为空
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@ -0,0 +1,49 @@
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#!/usr/bin/env bash
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file="/etc/hosts"
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if [[ -r ${file} ]]; then
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echo "${file} 文件可读"
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else
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echo "${file} 文件不可读"
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fi
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if [[ -w ${file} ]]; then
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echo "${file} 文件可写"
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else
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echo "${file} 文件不可写"
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fi
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if [[ -x ${file} ]]; then
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echo "${file} 文件可执行"
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else
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echo "${file} 文件不可执行"
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fi
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if [[ -f ${file} ]]; then
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echo "${file} 文件为普通文件"
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else
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echo "${file} 文件为特殊文件"
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fi
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if [[ -d ${file} ]]; then
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echo "${file} 文件是个目录"
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else
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echo "${file} 文件不是个目录"
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fi
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if [[ -s ${file} ]]; then
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echo "${file} 文件不为空"
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else
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echo "${file} 文件为空"
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fi
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if [[ -e ${file} ]]; then
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echo "${file} 文件存在"
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else
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echo "${file} 文件不存在"
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fi
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# Execute: ./operator-demo6.sh
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# Output:(根据文件的实际情况，输出结果可能不同)
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# /etc/hosts 文件可读
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# /etc/hosts 文件可写
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# /etc/hosts 文件不可执行
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# /etc/hosts 文件为普通文件
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# /etc/hosts 文件不是个目录
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# /etc/hosts 文件不为空
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# /etc/hosts 文件存在
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@ -0,0 +1,59 @@
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#!/usr/bin/env bash
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x=10
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if [[ -n $1 ]]; then
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x=$1
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fi
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y=20
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if [[ -n $2 ]]; then
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y=$2
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fi
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echo "x=${x}, y=${y}"
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if [[ ${x} -eq ${y} ]]; then
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echo "${x} -eq ${y} : x 等于 y"
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else
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echo "${x} -eq ${y}: x 不等于 y"
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fi
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if [[ ${x} -ne ${y} ]]; then
|
||||
echo "${x} -ne ${y}: x 不等于 y"
|
||||
else
|
||||
echo "${x} -ne ${y}: x 等于 y"
|
||||
fi
|
||||
|
||||
if [[ ${x} -gt ${y} ]]; then
|
||||
echo "${x} -gt ${y}: x 大于 y"
|
||||
else
|
||||
echo "${x} -gt ${y}: x 不大于 y"
|
||||
fi
|
||||
|
||||
if [[ ${x} -lt ${y} ]]; then
|
||||
echo "${x} -lt ${y}: x 小于 y"
|
||||
else
|
||||
echo "${x} -lt ${y}: x 不小于 y"
|
||||
fi
|
||||
|
||||
if [[ ${x} -ge ${y} ]]; then
|
||||
echo "${x} -ge ${y}: x 大于或等于 y"
|
||||
else
|
||||
echo "${x} -ge ${y}: x 小于 y"
|
||||
fi
|
||||
|
||||
if [[ ${x} -le ${y} ]]; then
|
||||
echo "${x} -le ${y}: x 小于或等于 y"
|
||||
else
|
||||
echo "${x} -le ${y}: x 大于 y"
|
||||
fi
|
||||
|
||||
# Execute: ./operator-demo2.sh
|
||||
# Output:
|
||||
# x=10, y=20
|
||||
# 10 -eq 20: x 不等于 y
|
||||
# 10 -ne 20: x 不等于 y
|
||||
# 10 -gt 20: x 不大于 y
|
||||
# 10 -lt 20: x 小于 y
|
||||
# 10 -ge 20: x 小于 y
|
||||
# 10 -le 20: x 小于或等于 y
|
||||
|
|
@ -0,0 +1,45 @@
|
|||
#!/usr/bin/env bash
|
||||
|
||||
x=10
|
||||
if [[ -n $1 ]]; then
|
||||
x=$1
|
||||
fi
|
||||
|
||||
y=20
|
||||
if [[ -n $2 ]]; then
|
||||
y=$2
|
||||
fi
|
||||
|
||||
echo "x=${x}, y=${y}"
|
||||
|
||||
if [[ ${x} != ${y} ]]; then
|
||||
echo "${x} != ${y} : x 不等于 y"
|
||||
else
|
||||
echo "${x} != ${y}: x 等于 y"
|
||||
fi
|
||||
|
||||
if [[ ${x} -lt 100 && ${y} -gt 15 ]]; then
|
||||
echo "${x} 小于 100 且 ${y} 大于 15 : 返回 true"
|
||||
else
|
||||
echo "${x} 小于 100 且 ${y} 大于 15 : 返回 false"
|
||||
fi
|
||||
|
||||
if [[ ${x} -lt 100 || ${y} -gt 100 ]]; then
|
||||
echo "${x} 小于 100 或 ${y} 大于 100 : 返回 true"
|
||||
else
|
||||
echo "${x} 小于 100 或 ${y} 大于 100 : 返回 false"
|
||||
fi
|
||||
|
||||
if [[ ${x} -lt 5 || ${y} -gt 100 ]]; then
|
||||
echo "${x} 小于 5 或 ${y} 大于 100 : 返回 true"
|
||||
else
|
||||
echo "${x} 小于 5 或 ${y} 大于 100 : 返回 false"
|
||||
fi
|
||||
|
||||
# Execute: ./operator-demo3.sh
|
||||
# Output:
|
||||
# x=10, y=20
|
||||
# 10 != 20 : x 不等于 y
|
||||
# 10 小于 100 且 20 大于 15 : 返回 true
|
||||
# 10 小于 100 或 20 大于 100 : 返回 true
|
||||
# 10 小于 5 或 20 大于 100 : 返回 false
|
||||
|
|
@ -0,0 +1,33 @@
|
|||
#!/usr/bin/env bash
|
||||
|
||||
x=10
|
||||
if [[ -n $1 ]]; then
|
||||
x=$1
|
||||
fi
|
||||
|
||||
y=20
|
||||
if [[ -n $2 ]]; then
|
||||
y=$2
|
||||
fi
|
||||
|
||||
echo "x=${x}, y=${y}"
|
||||
|
||||
if [[ ${x} -lt 100 && ${y} -gt 100 ]]
|
||||
then
|
||||
echo "${x} -lt 100 && ${y} -gt 100 返回 true"
|
||||
else
|
||||
echo "${x} -lt 100 && ${y} -gt 100 返回 false"
|
||||
fi
|
||||
|
||||
if [[ ${x} -lt 100 || ${y} -gt 100 ]]
|
||||
then
|
||||
echo "${x} -lt 100 || ${y} -gt 100 返回 true"
|
||||
else
|
||||
echo "${x} -lt 100 || ${y} -gt 100 返回 false"
|
||||
fi
|
||||
|
||||
# Execute: ./operator-demo4.sh
|
||||
# Output:
|
||||
# x=10, y=20
|
||||
# 10 -lt 100 && 20 -gt 100 返回 false
|
||||
# 10 -lt 100 || 20 -gt 100 返回 true
|
||||
|
|
@ -0,0 +1,55 @@
|
|||
#!/usr/bin/env bash
|
||||
|
||||
x=10
|
||||
if [[ -n $1 ]]; then
|
||||
x=$1
|
||||
fi
|
||||
|
||||
y=20
|
||||
if [[ -n $2 ]]; then
|
||||
y=$2
|
||||
fi
|
||||
|
||||
echo "x=${x}, y=${y}"
|
||||
|
||||
val=`expr ${x} + ${y}`
|
||||
echo "${x} + ${y} = $val"
|
||||
|
||||
val=`expr ${x} - ${y}`
|
||||
echo "${x} - ${y} = $val"
|
||||
|
||||
val=`expr ${x} \* ${y}`
|
||||
echo "${x} * ${y} = $val"
|
||||
|
||||
val=`expr ${y} / ${x}`
|
||||
echo "${y} / ${x} = $val"
|
||||
|
||||
val=`expr ${y} % ${x}`
|
||||
echo "${y} % ${x} = $val"
|
||||
|
||||
if [[ ${x} == ${y} ]]; then
|
||||
echo "${x} = ${y}"
|
||||
fi
|
||||
if [[ ${x} != ${y} ]]; then
|
||||
echo "${x} != ${y}"
|
||||
fi
|
||||
|
||||
# Execute: ./operator-demo.sh
|
||||
# Output:
|
||||
# x=10, y=20
|
||||
# 10 + 20 = 30
|
||||
# 10 - 20 = -10
|
||||
# 10 * 20 = 200
|
||||
# 20 / 10 = 2
|
||||
# 20 % 10 = 0
|
||||
# 10 != 20
|
||||
|
||||
# Execute: ./operator-demo.sh 10 30
|
||||
# Output:
|
||||
# x=10, y=30
|
||||
# 10 + 30 = 40
|
||||
# 10 - 30 = -20
|
||||
# 10 * 30 = 300
|
||||
# 30 / 10 = 3
|
||||
# 30 % 10 = 0
|
||||
# 10 不等于 30
|
||||
|
|
@ -0,0 +1,29 @@
|
|||
#!/bin/bashost="127.0.0.2"
|
||||
user="root"
|
||||
password="root"
|
||||
|
||||
/usr/bin/expect << EOF
|
||||
set timeout 5
|
||||
spawn ssh -o "StrictHostKeyChecking no" ${user}@${host}
|
||||
expect {
|
||||
"yes/no)?" { send "yes\r"; exp_continue }
|
||||
"password:" { send "${password}\r" }
|
||||
}
|
||||
|
||||
expect "root*"
|
||||
send "ssh-keygen -t rsa\r"
|
||||
expect "Enter file in which to save the key*"
|
||||
send "\r"
|
||||
|
||||
expect {
|
||||
"(y/n)?" { send "n\r"; exp_continue }
|
||||
"Enter passphrase*" { send "\r"; exp_continue }
|
||||
"Enter same passphrase again:" { send "\r" }
|
||||
}
|
||||
|
||||
expect "root*"
|
||||
send "df -h\r"
|
||||
expect "root*"
|
||||
send "exit\r"
|
||||
|
||||
EOF
|
||||
|
|
@ -10,11 +10,8 @@ function multem {
|
|||
echo $[ $1 * $2 ]
|
||||
}
|
||||
|
||||
function divem
|
||||
|
||||
{
|
||||
if [ $2 -ne 0]
|
||||
then
|
||||
function divem {
|
||||
if [ $2 -ne 0]; then
|
||||
echo $[ $1 / $2 ]
|
||||
else
|
||||
echo -1
|
||||
|
|
|
|||
|
|
@ -0,0 +1,13 @@
|
|||
#!/usr/bin/env bash
|
||||
|
||||
################### 使用break跳出外部循环 ###################
|
||||
# 查找 10 以内第一个能整除 2 和 3 的正整数
|
||||
i=1
|
||||
while [[ ${i} -lt 10 ]]; do
|
||||
if [[ $((i % 3)) -eq 0 ]] && [[ $((i % 2)) -eq 0 ]]; then
|
||||
echo ${i}
|
||||
break;
|
||||
fi
|
||||
i=`expr ${i} + 1`
|
||||
done
|
||||
# Output: 6
|
||||
|
|
@ -0,0 +1,41 @@
|
|||
#!/usr/bin/env bash
|
||||
|
||||
echo "input param: " $1 $2 $3
|
||||
|
||||
x=0
|
||||
if [[ -n $1 ]]; then
|
||||
x=$1
|
||||
fi
|
||||
|
||||
oper=""
|
||||
if [[ -n $2 ]]; then
|
||||
oper=$2
|
||||
fi
|
||||
|
||||
y=0
|
||||
if [[ -n $3 ]]; then
|
||||
y=$3
|
||||
fi
|
||||
|
||||
exec
|
||||
case ${oper} in
|
||||
+ | add)
|
||||
val=`expr ${x} + ${y}`
|
||||
echo "${x} + ${y} = ${val}"
|
||||
;;
|
||||
- | sub)
|
||||
val=`expr ${x} - ${y}`
|
||||
echo "${x} - ${y} = ${val}"
|
||||
;;
|
||||
* | mul)
|
||||
val=`expr ${x} \* ${y}`
|
||||
echo "${x} * ${y} = ${val}"
|
||||
;;
|
||||
/ | div)
|
||||
val=`expr ${x} / ${y}`
|
||||
echo "${x} / ${y} = ${val}"
|
||||
;;
|
||||
*)
|
||||
echo "Unknown oper!"
|
||||
;;
|
||||
esac
|
||||
|
|
@ -0,0 +1,30 @@
|
|||
#!/usr/bin/env bash
|
||||
|
||||
# 打印10以内的奇数
|
||||
for (( i = 0; i < 10; i ++ )); do
|
||||
if [[ $((i % 2)) -eq 0 ]]; then
|
||||
continue
|
||||
fi
|
||||
echo ${i}
|
||||
done
|
||||
# Output:
|
||||
# 1
|
||||
# 3
|
||||
# 5
|
||||
# 7
|
||||
# 9
|
||||
|
||||
# 多重循环中的 continue 用法
|
||||
for (( a = 1; a <= 5; a ++ ))
|
||||
do
|
||||
echo "Iteration $a:"
|
||||
for (( b = 1; b < 3; b ++ ))
|
||||
do
|
||||
if [[ $a -gt 2 ]] && [[ $a -lt 4 ]]
|
||||
then
|
||||
continue 2
|
||||
fi
|
||||
var3=$[ $a * $b ]
|
||||
echo " The result of $a * $b is $var3"
|
||||
done
|
||||
done
|
||||
|
|
@ -1,17 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
#continuing an outer loop
|
||||
|
||||
for (( a = 1; a <= 5; a ++ ))
|
||||
do
|
||||
echo "Iteration $a:"
|
||||
for (( b = 1; b < 3; b ++ ))
|
||||
do
|
||||
if [ $a -gt 2 ] && [ $a -lt 4 ]
|
||||
then
|
||||
continue 2
|
||||
fi
|
||||
var3=$[ $a * $b ]
|
||||
echo " The result of $a * $b is $var3"
|
||||
done
|
||||
done
|
||||
|
|
@ -0,0 +1,68 @@
|
|||
#!/usr/bin/env bash
|
||||
|
||||
################### for 语句 ###################
|
||||
echo "print 0 to 9"
|
||||
for (( j = 0; j < 10; j ++ )); do
|
||||
echo ${j}
|
||||
done
|
||||
# Output:
|
||||
# print 0 to 9
|
||||
# 0
|
||||
# 1
|
||||
# 2
|
||||
# 3
|
||||
# 4
|
||||
# 5
|
||||
# 6
|
||||
# 7
|
||||
# 8
|
||||
# 9
|
||||
|
||||
################### for in 语句 ###################
|
||||
echo "print 1 to 5"
|
||||
for i in {1..5}; do
|
||||
echo ${i};
|
||||
done
|
||||
# Output:
|
||||
# print 1 to 5
|
||||
# 1
|
||||
# 2
|
||||
# 3
|
||||
# 4
|
||||
# 5
|
||||
|
||||
################### for in 语句遍历文件 ###################
|
||||
DIR=/home/zp
|
||||
for FILE in ${DIR}/*.sh; do
|
||||
mv "$FILE" "${DIR}/scripts"
|
||||
done
|
||||
# 将 /home/zp 目录下所有 sh 文件拷贝到 /home/zp/scripts
|
||||
|
||||
################### 在 for 语句中使用多个变量 ###################
|
||||
for (( x = 1 , y = 10; x <= y; x ++ , y -- ))
|
||||
do
|
||||
echo "$y - $x = $(($y - $x))"
|
||||
done
|
||||
|
||||
################### 嵌套 for 循环 ###################
|
||||
for (( x = 1; x <= 3; x ++ ))
|
||||
do
|
||||
echo "Starting loop $x:"
|
||||
for (( y = 1; y <= 3; y ++ ))
|
||||
do
|
||||
echo "Inside loog: $y:"
|
||||
done
|
||||
done
|
||||
#Output
|
||||
#Starting loop 1:
|
||||
#Inside loog: 1:
|
||||
#Inside loog: 2:
|
||||
#Inside loog: 3:
|
||||
#Starting loop 2:
|
||||
#Inside loog: 1:
|
||||
#Inside loog: 2:
|
||||
#Inside loog: 3:
|
||||
#Starting loop 3:
|
||||
#Inside loog: 1:
|
||||
#Inside loog: 2:
|
||||
#Inside loog: 3:
|
||||
|
|
@ -0,0 +1,35 @@
|
|||
#!/usr/bin/env bash
|
||||
|
||||
################### if 语句 ###################
|
||||
# 写成一行
|
||||
if [[ 1 -eq 1 ]]; then
|
||||
echo "1 -eq 1 result is: true";
|
||||
fi
|
||||
# Output: 1 -eq 1 result is: true
|
||||
|
||||
# 写成多行
|
||||
if [[ "abc" -eq "abc" ]]
|
||||
then
|
||||
echo ""abc" -eq "abc" result is: true"
|
||||
fi
|
||||
# Output: abc -eq abc result is: true
|
||||
|
||||
################### if else 语句 ###################
|
||||
if [[ 2 -ne 1 ]]; then
|
||||
echo "true"
|
||||
else
|
||||
echo "false"
|
||||
fi
|
||||
# Output: true
|
||||
|
||||
################### if elif else 语句 ###################
|
||||
x=10
|
||||
y=20
|
||||
if [[ ${x} > ${y} ]]; then
|
||||
echo "${x} > ${y}"
|
||||
elif [[ ${x} < ${y} ]]; then
|
||||
echo "${x} < ${y}"
|
||||
else
|
||||
echo "${x} = ${y}"
|
||||
fi
|
||||
# Output: 10 < 20
|
||||
|
|
@ -1,11 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
#testing the else section
|
||||
testuser=badtest
|
||||
if grep $testuser /etc/passwd
|
||||
then
|
||||
echo The files for user $testuser are:
|
||||
ls -a /home/.b*
|
||||
else
|
||||
echo "The user name $testuser does not exist on this system"
|
||||
fi
|
||||
|
|
@ -1,13 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
#testing the if statement
|
||||
if date
|
||||
then
|
||||
echo "it worked"
|
||||
fi
|
||||
echo -e '\n'
|
||||
if asd
|
||||
then
|
||||
echo "it not worked"
|
||||
fi
|
||||
echo 'We are outside the if statement'
|
||||
|
|
@ -0,0 +1,14 @@
|
|||
#!/usr/bin/env bash
|
||||
|
||||
PS3="Choose the package manager: "
|
||||
select ITEM in bower npm gem pip
|
||||
do
|
||||
echo -n "Enter the package name: " && read PACKAGE
|
||||
case ${ITEM} in
|
||||
bower) bower install ${PACKAGE} ;;
|
||||
npm) npm install ${PACKAGE} ;;
|
||||
gem) gem install ${PACKAGE} ;;
|
||||
pip) pip install ${PACKAGE} ;;
|
||||
esac
|
||||
break # 避免无限循环
|
||||
done
|
||||
|
|
@ -0,0 +1,27 @@
|
|||
#!/usr/bin/env bash
|
||||
|
||||
x=0
|
||||
until [[ ${x} -ge 5 ]]; do
|
||||
echo ${x}
|
||||
x=`expr ${x} + 1`
|
||||
done
|
||||
# Output:
|
||||
# 0
|
||||
# 1
|
||||
# 2
|
||||
# 3
|
||||
# 4
|
||||
|
||||
x=0
|
||||
until echo $x
|
||||
[[ $x -ge 5 ]]
|
||||
do
|
||||
x=$[ $x + 1 ]
|
||||
done
|
||||
# Output:
|
||||
# 0
|
||||
# 1
|
||||
# 2
|
||||
# 3
|
||||
# 4
|
||||
# 5
|
||||
|
|
@ -0,0 +1,51 @@
|
|||
#!/usr/bin/env bash
|
||||
|
||||
################### while 循环输出 0 ~ 9 的平方数 ###################
|
||||
x=0
|
||||
while [[ ${x} -lt 10 ]]; do
|
||||
echo $((x * x))
|
||||
x=$((x + 1))
|
||||
done
|
||||
# Output:
|
||||
# 0
|
||||
# 1
|
||||
# 4
|
||||
# 9
|
||||
# 16
|
||||
# 25
|
||||
# 36
|
||||
# 49
|
||||
# 64
|
||||
# 81
|
||||
|
||||
################### while 循环输出 0 ~ 9 ###################
|
||||
x=0
|
||||
while echo ${x}
|
||||
[[ ${x} -lt 9 ]]
|
||||
do
|
||||
x=$((x + 1))
|
||||
done
|
||||
# Output:
|
||||
# 0
|
||||
# 1
|
||||
# 2
|
||||
# 3
|
||||
# 4
|
||||
# 5
|
||||
# 6
|
||||
# 7
|
||||
# 8
|
||||
# 9
|
||||
|
||||
################### while 循环嵌套 for 循环 ###################
|
||||
x=5
|
||||
while [[ $x -ge 0 ]]
|
||||
do
|
||||
echo "Outer loop: $x"
|
||||
for (( y = 1; $y < 3; y ++ ))
|
||||
do
|
||||
z=$[ $x * $y ]
|
||||
echo "Inner loop: $x * $y = $z"
|
||||
done
|
||||
x=$[ $x - 1 ]
|
||||
done
|
||||
|
|
@ -1,16 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
# placing a for loop inside a while loop
|
||||
|
||||
var1=5
|
||||
|
||||
while [ $var1 -ge 0 ]
|
||||
do
|
||||
echo "Outer loop: $var1"
|
||||
for (( var2 = 1; $var2 < 3; var2 ++ ))
|
||||
do
|
||||
var3=$[ $var1 * $var2 ]
|
||||
echo "Inner loop: $var1 * $var2 = $var3"
|
||||
done
|
||||
var1=$[ $var1 - 1 ]
|
||||
done
|
||||
|
|
@ -1,12 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
#nesting for loops
|
||||
|
||||
for (( a = 1; a <= 3; a ++ ))
|
||||
do
|
||||
echo "Starting loop $a:"
|
||||
for (( b = 1; b <= 3; b ++ ))
|
||||
do
|
||||
echo "Inside loog: $b:"
|
||||
done
|
||||
done
|
||||
|
|
@ -1,12 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
# using a variable to hold the list
|
||||
|
||||
list="Alabama Alaska Arizona"
|
||||
list=$list" Connecticut"
|
||||
|
||||
for state in $list
|
||||
do
|
||||
echo "Have you ever visited $state"
|
||||
done
|
||||
|
||||
|
|
@ -1,8 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
#testing the C-style for loop
|
||||
|
||||
for (( i = 1; i <= 10; i ++ ))
|
||||
do
|
||||
echo "The next number is $i"
|
||||
done
|
||||
|
|
@ -1,17 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
# break n，默认为1
|
||||
|
||||
for (( a = 1; a <= 3; a ++ ))
|
||||
do
|
||||
echo "Outer loop : $a"
|
||||
for (( b = 1; b < 100; b ++ ))
|
||||
do
|
||||
if [ $b -gt 4 ]
|
||||
then
|
||||
break 2
|
||||
fi
|
||||
echo " Inner loop:$b"
|
||||
done
|
||||
done
|
||||
|
||||
|
|
@ -1,15 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
#using the case command
|
||||
|
||||
case $USER in
|
||||
tiandi | barbar)
|
||||
echo "Welcome, $USER"
|
||||
echo "Pleas enjoy your visit" ;;
|
||||
testing)
|
||||
echo "Special testing account" ;;
|
||||
jessica)
|
||||
echo "Do not forget to logout when you are out" ;;
|
||||
*)
|
||||
echo "Sorry, you are not allowed here" ;;
|
||||
esac
|
||||
|
|
@ -1,12 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
#using the continue command
|
||||
|
||||
for (( var1 = 1; var1 < 15; var1 ++ ))
|
||||
do
|
||||
if [ $var1 -gt 5 ] && [ $var1 -lt 10 ]
|
||||
then
|
||||
continue
|
||||
fi
|
||||
echo "Iteration number:$var1"
|
||||
done
|
||||
|
|
@ -1,19 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
# looking for a possible value
|
||||
|
||||
if [ $USER = "tiandi" ]
|
||||
then
|
||||
echo "Welcome $USER"
|
||||
echo "Please enjoy your visit"
|
||||
elif [ $USER = testing ]
|
||||
then
|
||||
echo "Welcome $USER"
|
||||
echo "Please enjoy your visit"
|
||||
elif [ $USER = barbar ]
|
||||
then
|
||||
echo "Do not forget to logout when you're done"
|
||||
else
|
||||
echo "Sorry, you are not allowed here"
|
||||
fi
|
||||
|
||||
|
|
@ -1,16 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
var1=10
|
||||
var2=5
|
||||
if [ $var1 -gt 5 ]
|
||||
then
|
||||
echo "The test value $var1 is greater than 5"
|
||||
fi
|
||||
if [ $var1 -eq $var2 ]
|
||||
then
|
||||
echo "The values is equal"
|
||||
else
|
||||
echo "The values are different"
|
||||
fi
|
||||
|
||||
|
||||
|
|
@ -1,21 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
#using the until command
|
||||
|
||||
var1=100
|
||||
until [ $var1 -eq 0 ]
|
||||
do
|
||||
echo $var1
|
||||
var1=$[ $var1 - 25 ]
|
||||
done
|
||||
|
||||
var1=100
|
||||
until echo $var1
|
||||
[ $var1 -eq 0 ]
|
||||
do
|
||||
echo Inside the loop: $var1
|
||||
var1=$[ $var1 - 25 ]
|
||||
done
|
||||
|
||||
|
||||
|
||||
|
|
@ -1,10 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
# while command test
|
||||
var1=10
|
||||
while [ $var1 -gt 0 ]
|
||||
do
|
||||
echo $var1
|
||||
var1=$[ $var1 - 1 ]
|
||||
done
|
||||
|
||||
|
|
@ -1,11 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
#testing a multicommand while loop
|
||||
|
||||
var1=10
|
||||
while echo $var1
|
||||
[ $var1 -ge 0 ]
|
||||
do
|
||||
echo 'This is inside the loop'
|
||||
var1=$[ $var1 - 1 ]
|
||||
done
|
||||
|
|
@ -1,8 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
# another example of how not to use the for command
|
||||
|
||||
for test in Newada "New Hampshire"
|
||||
do
|
||||
echo "Now going to $test"
|
||||
done
|
||||
|
|
@ -7,9 +7,18 @@
|
|||
val1=baseball
|
||||
val2=hockey
|
||||
|
||||
if [ $val1 > $val2 ]
|
||||
################### 错误使用大于小于号 ##################
|
||||
if [[ $val1 > $val2 ]]
|
||||
then
|
||||
echo "$val1 is greater than $val2"
|
||||
else
|
||||
echo "$val1 is less than $val2"
|
||||
fi
|
||||
|
||||
################### 正确使用大于小于号 ###################
|
||||
if [[ $val1 \> $val2 ]]
|
||||
then
|
||||
echo "$val1 is greater than $val2"
|
||||
else
|
||||
echo "$val1 is less than $val2"
|
||||
fi
|
||||
|
|
@ -1,10 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
#testing compound comparisons
|
||||
|
||||
if [ -d $HOME ] && [ -w $HOME/testing ]
|
||||
then
|
||||
echo "The file exists and you can write to it"
|
||||
else
|
||||
echo "I cannot write to it"
|
||||
fi
|
||||
|
|
@ -1,30 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
# testing string length
|
||||
|
||||
#-n 判断长度是否非零
|
||||
#-z 判断长度是否为零
|
||||
|
||||
val1=testing
|
||||
val2=''
|
||||
|
||||
if [ -n "$val1" ]
|
||||
then
|
||||
echo "The string $val1 is not empty"
|
||||
else
|
||||
echo "The string $val1 is empty"
|
||||
fi
|
||||
|
||||
if [ -z "$val2" ]
|
||||
then
|
||||
echo "The string $val2 is empty"
|
||||
else
|
||||
echo "The string $val2 is not empty"
|
||||
fi
|
||||
if [ -z "$val3" ]
|
||||
then
|
||||
echo "The string $val3 is empty"
|
||||
else
|
||||
echo "The string $val3 is not empty"
|
||||
fi
|
||||
|
||||
|
|
@ -1,8 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
# multiple variables
|
||||
|
||||
for (( a = 1 , b = 10; a <= 10; a ++ , b -- ))
|
||||
do
|
||||
echo "$a - $b"
|
||||
done
|
||||
|
|
@ -1,9 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
#testing multiple commands in the then section
|
||||
testuser=tiandi
|
||||
if grep $testuser /etc/passwd
|
||||
then
|
||||
echo The bash files from user $testuser are:
|
||||
ls -a /home/$testuser/.b*
|
||||
fi
|
||||
|
|
@ -1,10 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
#testing string equality
|
||||
|
||||
testuser=tiandi
|
||||
|
||||
if [ $USER = $testuser ]
|
||||
then
|
||||
echo "Welcome $testuser"
|
||||
fi
|
||||
|
|
@ -1,2 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
|
|
@ -1,21 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
# checking if a directory or a file exists
|
||||
|
||||
if [ -e $HOME ]
|
||||
then
|
||||
echo "OK on the directory.now to check the file"
|
||||
#checking if a file exists
|
||||
if [ -e $HOME/testing ]
|
||||
then
|
||||
#the file exists,append data to it
|
||||
echo "Appending date to existing file"
|
||||
date >> $HOME/testing
|
||||
else
|
||||
#the file is not exists,create a new file
|
||||
echo "Creating a new file"
|
||||
date > $HOME/testing
|
||||
fi
|
||||
else
|
||||
echo 'Sorry. you do not have a $HOME directory'
|
||||
fi
|
||||
|
|
@ -1,12 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
# look before you leap
|
||||
|
||||
if [ -d $HOME ]
|
||||
then
|
||||
echo "Your home directory exists"
|
||||
cd $HOME
|
||||
ls -a
|
||||
else
|
||||
echo "There is a problem with your HOME direcotry"
|
||||
fi
|
||||
|
|
@ -1,13 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
#正确使用大于小于号
|
||||
|
||||
val1=baseball
|
||||
val2=hocky
|
||||
|
||||
if [ $val1 \> $val2 ]
|
||||
then
|
||||
echo "$val1 is greater than $val2"
|
||||
else
|
||||
echo "$val1 is less than $val2"
|
||||
fi
|
||||
|
|
@ -1,6 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
for test in I don\'t know if "this'll" work
|
||||
do
|
||||
echo "word:$test"
|
||||
done
|
||||
|
|
@ -1,7 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
# basic for command
|
||||
for test in Alabama Alaska Arizona
|
||||
do
|
||||
echo The next state is $test
|
||||
done
|
||||
Loading…
Reference in New Issue