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