#!/bin/bash
#批量创建用户，并设置8位随机数密码,用户以poc开头
for ((i=1;i<=3;i++))
do
        passwd=`uuidgen |cut -c 1-8`
        useradd poc$i
        echo $passwd |passwd --stdin poc$i &>/dev/null
        echo -e "user: poc$i pass: $passwd" >>/root/user.txt
done

#!/bin/bash
#批量删除用户
for ((i=1;i<=3;i++))
do
        if id poc$i &>/dev/null;then
                userdel -r poc$i &>/dev/null
                echo "poc$i is deleted"
        else
                echo "poc$ not exist"
        fi
done

[root@lb ~]# netstat -n |awk ‘/^tcp/ {print $4}‘ |awk -F":" ‘{print $1}‘|sort |uniq -c |sort -rn