<linux小腳本>批量添加/删除使用者

#!/bin/bash

if [ $1 == "add" ];then

    for i in {1..10}; do    

        if id user$i &> /dev/null;then

            echo "the user$i exists!"

        else

            useradd user$i &> /dev/null

            echo "user$i" | passwd --stdin user$i &> /dev/null

            echo "user$i creat success!"        

        fi    

    done

elif [ $1 == "del" ];then    

    for i in {1..10};do

            userdel -r user$i

            echo "user$i deleted"

            echo "user$i not exists!"

        fi

else

    echo -e "unknown arguments"

fi