批量创建用户

#!/bin/bash
echo "创建成功的用户" > /root/user_name
read -ep "请输入要创建的用户:" num

for i in `seq 1 $num`
do
  pw=`cat /dev/urandom | head -1|md5sum |head -c 5`
  id wg$i > /dev/null 2>&1
  if [ $? -eq 0 ];then
    while true
    do
      read -ep "wg$i用户已经存在,是否要删除此用户(y/n):" select
      case $select in
      y|Y)
        userdel -rf wg$i > /dev/null
        echo "wg$i删除成功"
        break
      ;;
      n|N)
        break
      ;;
      *)
        echo "输入的字符有误,请重新输入"
      esac
    done
  else
    useradd wg$i > /dev/null 2>&1
    if [ $? -eq 0 ];then
      echo "wg$i用户创建成功"
      echo "wg$pw" | passwd --stdin wg$i
      echo "wg$i $pw" >> /root/user_name
    else
      echo "用户创建失败"
    fi
  fi
done
cat /root/user_name