Shell's common script

1 Batch Create users:

#!/bin/bash

I=30

Groupadd Class2

While [$i-le 50]

Do

If ID user$i &>/dev/null

Then

echo "This user$i is exist"

Else

Useradd-g class2 user$i && echo "User$i" | passwd--stdin user$i &>/dev/null && echo "This user$i is created"

Fi

((i++))

Done

2 Detect if the host is alive:

#!/bin/bash

host=192.168.154.

i=120

While [$i-le 130]

Do

Ping-c 3 $host $i &>/dev/null

If [$?-eq 0]

Then

echo "This host $host $i are up"

Else

echo "This host $host $i are down"

Fi

((i++))

Done

3 Get the LAN Ip--mac address list:

#!/bin/bash

host=192.168.154.

I=1

While [$i-le 10]

Do

Arping-c 2 $host $i | Egrep ' Reply ' | Awk-f ' {print $4 $ ' >>/root/c.txt

((i++))

Done

This article from "10,000 years too long, seize" blog, please be sure to keep this source http://zengwj1949.blog.51cto.com/10747365/1925627

Shell's common script