生成用戶賬戶密碼的shell

這是一個添加用戶的小腳本，詳情請看代碼的註釋

#!/bin/bash

## @author enum.Lin
## @desc   這是一個自動生成用戶和密碼，並可以將用戶添加到sudoers 列表中的shell
#########  需要 root 的權限運行

## 帶錯誤信息的退出函數 ##############
function exitWithErrorMsg() {
    echo -e $1
    read andKey
   exit 1
}

# 收集用戶名
echo "please input your username..."
read username

# 檢測用戶是否存在
USER_COUNT=`cat /etc/passwd | grep "^$username:" -c`
if [ $USER_COUNT -ne 0 ]; then
    exitWithErrorMsg "The account [$username] is exist.";
fi

# 收集用戶密碼
echo "please first input your paassword..."
read -s firstPassword
echo "please second input your username..."
read -s secondPassword

# 檢查兩次密碼輸入是否一致
if [ $firstPassword != $secondPassword ]; then
   exitWithErrorMsg "two input password is not sample!\ninput andy key exit shell...";
fi

# 是否加入到sudoers 文件中
echo "Is add to sudoers 【yes/no】?no"
read isSudoer

# 新增和修改用戶密碼
adduser $username
echo "$firstPassword" | passwd --stdin "$username"

# 添加到 sudoers 列表
if [ "$isSudoer" = "yes" ]; then
   sudo echo "$username  ALL=(ALL:ALL)    ALL" >> /etc/sudoers
   echo "add user into sudoers list"
fi

## 生成報告
echo "create user is success!"
echo -e "username:$username\npaassword:$firstPassword\nadd2SudoerFlag:$isSudoer"

echo "輸入任意鍵，退出界面，退出前，請保存好生成的賬號密碼！"
read anyKey