89 lines
2.2 KiB
Bash
89 lines
2.2 KiB
Bash
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#!/usr/bin/env bash
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###################################################################################
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# Linux Centos 设置环境配置脚本
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# Author: Zhang Peng
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#
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# 不了解脚本中配置意图的情况下，不要贸然执行此脚本
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###################################################################################
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# 获取当前机器 IP
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ip=""
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getDeviceIp() {
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ip=`ifconfig eth0 | grep "inet addr" | awk '{ print $2}' | awk -F: '{print $2}'`
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if [ "$ip" == "" ]
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then
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ip=`ifconfig ens32 | grep "inet"|grep "broadcast" | awk '{ print $2}' | awk -F: '{print $1}'`
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fi
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if [ "$ip" == "" ]
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then
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ip=`echo $1`
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fi
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if [ "${ip}" == "" ]
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then
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echo "无法获取IP地址"
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exit 0
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fi
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}
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host=`hostname`
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#set the file limit
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cat >> /etc/security/limits.conf << EOF
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* - nofile 65535
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* - nproc 65535
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EOF
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#set system language utf8
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cat > /etc/sysconfig/i18n << EOF
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LANG="zh_CN.UTF-8"
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EOF
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#set DNS
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cat >> /etc/hosts << EOF
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${ip} ${host}
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EOF
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#set the control-alt-delete to guard against the miSUSE
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sed -i 's#exec /sbin/shutdown -r now#\#exec /sbin/shutdown -r now#' /etc/init/control-alt-delete.conf
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#disable selinux
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sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
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#Full multiuser mode
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sed -i 's/id:5:initdefault:/id:3:initdefault:/' /etc/inittab
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#tune kernel parametres
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cat >> /etc/sysctl.conf << EOF
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net.ipv4.tcp_tw_reuse = 1
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net.ipv4.tcp_tw_recycle = 1
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net.ipv4.tcp_fin_timeout = 2
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net.ipv4.tcp_syncookies = 1
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net.ipv4.tcp_keepalive_time = 1200
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net.ipv4.tcp_max_syn_backlog = 16384
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net.core.netdev_max_backlog = 16384
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net.core.somaxconn = 32768
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net.core.wmem_default = 8388608
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net.core.rmem_default = 8388608
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net.core.rmem_max = 16777216
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net.core.wmem_max = 16777216
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net.ipv4.tcp_timestamps = 0
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net.ipv4.route.gc_timeout = 100
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net.ipv4.tcp_synack_retries = 1
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net.ipv4.tcp_syn_retries = 1
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net.ipv4.tcp_mem = 94500000 915000000 927000000
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net.ipv4.tcp_max_orphans = 3276800
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net.ipv4.ip_local_port_range = 2000 65535
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net.ipv4.tcp_max_tw_buckets = 5000
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vm.swappiness=10
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EOF
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#disable the ipv6
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cat > /etc/modprobe.d/ipv6.conf << EOF
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alias net-pf-10 off
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options ipv6 disable=1
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EOF
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echo "NETWORKING_IPV6=off" >> /etc/sysconfig/network
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