shell实现增加删除Linux系统用户脚本（密码为随机）

README

　　shell环境下运行脚本，根据需求选择相应的功能。

 List    \t\t  create the userlist 这一步是必须执行的，脚本会识别本地当前目录下的文件
 Useradd \t\t  useradd the user
 Passwd  \t\t  set the password to userlist
 Del        \t\t  deleate the user 删除用户之前必须要有需要删除用户的列表文件
 Sudoers \t\t  set the Sudoers
 Exit    \t\t  quit the shell

 #!/bin/bash
 ########################################
 #Author:qingbo.song                    #
 #Date:2015.11.                       #
 #E-mail:qingbo.song@apicloud.com       #
 #Comment: the system useradd           #
 #Path: /opt/shell/Linux_user_set.sh    #
 #Version:V 2.0                         #
 ########################################

 userfile="./userlist.txt"
 Option_Echo()
 {
 echo -e "
 ######################################################
 List    \t\t  create the userlist
 Useradd \t\t  useradd the user
 Passwd  \t\t  set the password to userlist
 Del        \t\t  deleate the user
 Sudoers \t\t  set the Sudoers
 Exit    \t\t  quit the shell
 ######################################################"
 }

 Welcome()
 {
     while [[  ==  ]]; do
         echo "===============Welcome to use Linux_user_set.sh!==============="
         echo "The shell to add the system user,and set the password to it! Please chose the option to run the program!"
         #显示命令提示信息，调用Option_Echo函数
         Option_Echo
         #获取用户输入的信息
         echo -n ":"
         read option
         if [[ -n "${option}" ]]; then    #判断用户输入的信息不为空
             if [[ "${option}" = "List" || "${option}" = "Useradd" || "${option}" = "Passwd" || "${option}" = "Del" || "${option}" = "Sudoers" || "${option}" = "Exit" ]]; then
                 if [[ "${option}" = "List" ]]; then
                     #创建用户列表函数调用
                     UserList
                     break
                 elif [[ "${option}" = "Useradd" ]]; then
                     #创建系统用户函数调用
                     UserAdd
                     break
                 elif [[ "${option}" = "Passwd" ]]; then
                     #设置用户密码函数调用
                     Passwd
                     break
                 elif [[ "${option}" = "Del" ]]; then
                     #sudoers函数调用
                     DelUser
                     break
                 elif [[ "${option}" = "Sudoers" ]]; then
                     Sudoers
                     break
                 elif [[ "${option}" = "Exit" ]]; then
                     #rm -fr ${userfile}    #删除userlist.txt文件
                     echo "The shell is shutdown!"
                     rm -fr ${userfile}
                     exit
                 else
                     echo "Please input the ture option,Thank you!"
                 fi
             else
                 echo "Please input the ture option,Thank you!"
             fi
         else
             echo "The option is not NULL!Please input the ture option,Thank you!"
         fi
     done
 }

 #创建用户列表
 UserList()
 {
     echo "You will create a file of the user list,it's the ${userfile}!The format:"
     echo -e "user01\nuser02"
     echo "Please input the \"exit\" to quit"
     #初始化userlist.txt
     cat /dev/null > ${userfile}
     while [[ $? ==  ]]; do
         echo -n "Please input the user name:"
         read name
         if [[ -n "${name}" ]]; then        #判断用户输入的信息是否非空
             if [[ "${name}" = "exit" || "${name}" = "EXIT" || "${name}" = "Exit" ]]; then
                 Welcome
             else
                 #将需要创建的用户添加到userlist.txt文件中
                 echo ${name} >> ${userfile}
                 echo "The user name \"${name}\" to save the file of ${userfile}!"
             fi
         else
             echo "The name is not NULL!Please input the Ture user name,Thank you!!!"
         fi
     done
 }

 #创建系统用户
 UserAdd()
 {
     cat ${userfile} |grep -v "#"|while read LINE
     do
         echo "Create the user of ${LINE}!"
         #-d 创建用户登录开始目录;-m 家目录不存在自动创建;-n 不创建相同名字的组;
         #mkdir /users
         useradd -d /home/${LINE} -m -n ${LINE} >> /dev/null >&
     done

     Welcome
 }

 #设置用户密码
 Passwd()
 {
     ip=`ip addr|grep eth0|tail -|awk '{print $2}'|awk -F "/" '{print $1}'`        #centos6.5获取
     name=`hostname`
     wdfile="./userpwdfile_${ip}_${name}.txt"
     #重置user_password_list.txt
     cat /dev/null > ${wdfile}
     cat ${userfile} |grep -v "#"|while read LINE
     do
         echo "Produce the user of ${LINE} password:"
         password=`</dev/urandom tr -dc '0123456789!@#$%{}<>=*&abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' | head -c24; echo ""`
         echo "${LINE}:${password}" >> ${wdfile}
         echo "${LINE}&&password save to the file ${wdfile}"
     done
     chpasswd < ${wdfile}
     if [[ $? -eq  ]]; then
         echo "The user password to set success!"
     else
         echo "The user password to set ERROR!Please try again for yourself!"
     fi
     #返回Welcome界面
     Welcome
 }

 #批量删除user
 DelUser()
 {
     echo "Now deleate the ${userfile} list of users:"
     cat ${userfile} |grep -v "#"|while read LINE
     do
         echo "Deleate the user of ${LINE}!"
         #-d 创建用户登录开始目录;-m 家目录不存在自动创建;-n 不创建相同名字的组;
         userdel -r ${LINE} >> /dev/null >&
     done

     Welcome
 }

 #批量添加sudoers,请谨慎使用该功能
 Sudoers()
 {
     echo "Now add the sudoers to /etc/sudoers:"
     if [[ -f ${userfile} ]]; then
         cat ${userfile}|grep -v "#"|while read LINE
         do
             echo "${LINE}    ALL=(ALL)     ALL" >> /etc/sudoers
             echo "${LINE} 用户成功添加到sudoers中"
         done
     else
         echo "${userfile}文件不存在!"
         exit
     fi    

     Welcome
 }

 #main 函数
 Welcome

批量管理Linux系统用户