diff --git a/codes/shell/git/check-git.sh b/codes/shell/git/check-git.sh
new file mode 100644
index 0000000..25f2256
--- /dev/null
+++ b/codes/shell/git/check-git.sh
@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+
+# ------------------------------------------------------------------------------
+# ASCII 颜色变量
+BLACK="\033[1;30m"
+RED="\033[1;31m"
+GREEN="\033[1;32m"
+YELLOW="\033[1;33m"
+BLUE="\033[1;34m"
+PURPLE="\033[1;35m"
+CYAN="\033[1;36m"
+RESET="\033[0m"
+
+# 常量
+YES=0
+NO=1
+# ------------------------------------------------------------------------------
+
+printf "$BLUE"
+cat << EOF
+# ------------------------------------------------------------------------------
+# 检查当前目录是否为 git 工程
+# ------------------------------------------------------------------------------
+EOF
+printf "$RESET"
+
+# 检查指定的路径是不是一个 git 项目
+checkGit() {
+  source=$1
+  if [[ -d "${source}" ]]; then
+      cd ${source} || return ${NO}
+      # （1）删除git状态零时文件
+      if [[ -f "gitstatus.tmp" ]]; then
+        rm -rf gitstatus.tmp
+      fi
+
+      # （2）判断是否存在 .git 目录
+      if [[ -d "./.git" ]]; then
+        # （3）判断git是否可用
+        git status &> gitstatus.tmp
+        gitStatus=false
+        grep -iwq 'not a git repository' gitstatus.tmp && gitStatus=false || gitStatus=true
+        rm -rf gitstatus.tmp
+        if [[ ${gitStatus} == true ]]; then
+            return ${YES}
+        else
+            return ${NO}
+        fi
+      fi
+  fi
+  return ${NO}
+}
+
+##################################### MAIN #####################################
+ROOT=$(pwd)
+printf "${BLUE}当前目录为：${ROOT} ${RESET}\n"
+
+checkGit ${ROOT}
+if [[ "${YES}" == "$?" ]]; then
+    printf "${GREEN}${ROOT} 是 git 工程。${RESET}\n"
+    exit ${YES}
+else
+    printf "${RED}${ROOT} 不是 git 工程。${RESET}\n"
+    exit ${NO}
+fi
diff --git a/codes/shell/git/update-git.sh b/codes/shell/git/update-git.sh
new file mode 100644
index 0000000..0ea5188
--- /dev/null
+++ b/codes/shell/git/update-git.sh
@@ -0,0 +1,156 @@
+#!/usr/bin/env bash
+
+# ------------------------------------------------------------------------------
+# console color
+BLACK="\033[1;30m"
+RED="\033[1;31m"
+GREEN="\033[1;32m"
+YELLOW="\033[1;33m"
+BLUE="\033[1;34m"
+PURPLE="\033[1;35m"
+CYAN="\033[1;36m"
+RESET="$(tput sgr0)"
+
+# 常量
+YES=0
+NO=1
+SUCCEED=0
+FAILED=1
+# ------------------------------------------------------------------------------
+
+printf "$BLUE"
+cat << EOF
+################################################################################
+# 项目初始化脚本
+################################################################################
+EOF
+printf "$RESET"
+
+# 检查指定的路径是不是一个 git 项目
+checkGit() {
+  source=$1
+  if [[ -d "${source}" ]]; then
+      cd ${source} || return ${NO}
+      # （1）删除git状态零时文件
+      if [[ -f "gitstatus.tmp" ]]; then
+        rm -rf gitstatus.tmp
+      fi
+
+      # （2）判断是否存在 .git 目录
+      if [[ -d "./.git" ]]; then
+        # （3）判断git是否可用
+        git status &> gitstatus.tmp
+        gitStatus=false
+        grep -iwq 'not a git repository' gitstatus.tmp && gitStatus=false || gitStatus=true
+        rm -rf gitstatus.tmp
+        if [[ ${gitStatus} == true ]]; then
+            return ${YES}
+        else
+            return ${NO}
+        fi
+      fi
+  fi
+  return ${NO}
+}
+
+cloneOrFetchGit() {
+    root=$1
+    group=$2
+    project=$3
+    branch=$4
+
+    if [[ ! -d "${root}" ]]; then
+        printf "${YELLOW}>>>> ${root} is not directory.${RESET}\n"
+        return ${FAILED}
+    fi
+
+    if [[ ! ${group} ]] || [[ ! ${project} ]] || [[ ! ${branch} ]]; then
+        printf "${YELLOW}>>>> group, project, branch must not be empty.${RESET}\n"
+        return ${FAILED}
+    fi
+
+    source=${root}/${group}/${project}
+    printf "${CYAN}>>>> project directory is ${source}.${RESET}\n"
+    printf "${CYAN}>>>> git url is ${REPOSITORY}:${group}/${project}.git.${RESET}\n"
+    mkdir -p ${root}/${group}
+
+    checkGit ${source}
+    if [[ "${YES}" == "$?" ]]; then
+        # 如果 ${source} 是 git 项目，执行 pull 操作
+        cd ${source} || return ${FAILED}
+
+        git checkout -f ${branch}
+        if [[ "${SUCCEED}" != "$?" ]]; then
+            printf "${RED}>>>> git checkout ${branch} failed.${RESET}\n"
+            return ${FAILED}
+        fi
+        printf "${GREEN}>>>> git checkout ${branch} succeed.${RESET}\n"
+
+        git reset --hard
+        if [[ "${SUCCEED}" != "$?" ]]; then
+            printf "${RED}>>>> git reset --hard failed.${RESET}\n"
+            return ${FAILED}
+        fi
+        printf "${GREEN}>>>> git reset --hard succeed.${RESET}\n"
+
+        git pull
+        if [[ "${SUCCEED}" != "$?" ]]; then
+            printf "${RED}>>>> git pull failed.${RESET}\n"
+            return ${FAILED}
+        fi
+        printf "${GREEN}>>>> git pull succeed.${RESET}\n"
+    else
+        # 如果 ${source} 不是 git 项目，执行 clone 操作
+
+        git clone "${REPOSITORY}:${group}/${project}.git" ${source}
+        if [[ "${SUCCEED}" != "$?" ]]; then
+            printf "${RED}>>>> git clone ${project} failed.${RESET}\n"
+            return ${FAILED}
+        fi
+        printf "${GREEN}>>>> git clone ${project} succeed.${RESET}\n"
+
+        cd ${source} || return ${FAILED}
+
+        git checkout -f ${branch}
+        if [[ "${SUCCEED}" != "$?" ]]; then
+            printf "${RED}>>>> git checkout ${branch} failed.${RESET}\n"
+            return ${FAILED}
+        fi
+        printf "${GREEN}>>>> git checkout ${branch} succeed.${RESET}\n"
+    fi
+
+    return ${SUCCEED}
+}
+
+doCloneOrFetchGit() {
+    cloneOrFetchGit $1 $2 $3 $4
+    if [[ "$?" == "${SUCCEED}" ]]; then
+        printf "\n${GREEN}>>>> Update git project [$2/$3] succeed.${RESET}\n"
+        return ${SUCCEED}
+    else
+        printf "\n${RED}>>>> Update git project [$2/$3] failed.${RESET}\n"
+        return ${FAILED}
+    fi
+}
+
+##################################### MAIN #####################################
+ROOT=$(pwd)
+
+# 这里需要根据实际情况替换 Git 仓库、项目组、项目、代码分支
+REPOSITORY="git@gitee.com"
+
+printf "${CYAN}Current path is ${ROOT}.${RESET}\n"
+
+doCloneOrFetchGit ${ROOT} turnon linux-tutorial master
+r1=$?
+doCloneOrFetchGit ${ROOT} turnon nginx-tutorial master
+r2=$?
+
+if [[ "${r1}" == "${SUCCEED}" && "${r2}" == "${SUCCEED}" ]]; then
+    printf "\n${GREEN}Succeed.${RESET}\n"
+    exit ${SUCCEED}
+else
+    printf "\n${RED}Failed.${RESET}\n"
+    exit ${FAILED}
+fi
+