linux批量创建删除用户shell script

• 批量创建用户

#!/bin/bash
# add_user.sh
if [ $# -eq 0 ];then
        echo "你没有输入任何文件!"
        exit 1
fi

if [ ! -f $1 ];then
        echo "输入有误！"
        exit 2
fi

for user in `cat user.txt`
do
   id $user &>/dev/null
   if [ $? -eq 0 ];then
        echo "用户$user已存在！"
   else
           useradd  $user
           #echo "123" | passwd --stdin $user
           echo $user:"123" | chpasswd
           echo add $user success!
   fi
done

• 批量删除用户

#!/bin/bash
# del_user.sh

if [ $# -eq 0 ];then
        echo "你没有输入任何文件!"
        exit 1
fi

if [ ! -f $1 ];then
        echo "输入有误！"
        exit 2
fi

for user in `cat $1`
do
   id $user &>/dev/null
   if [ $? -eq 0 ];then
       userdel -rf $user &>/dev/null
       echo "删除$user成功！"
   else
        echo "用户不存在！"
   fi
done

• 例子
  user.txt

user1
user2
user3
user4

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