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This article mainly introduces the shell script {}-how to use, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

To determine which IP is currently online in the 10.10.1.0 IP 255 network, which can be considered online according to the general rule of ping.

[root@sh-test] $cat test1.sh

#! / bin/bash

For ip in $(seq 1 255)

Do

{

Ping-c 1 10.10.1.$ip > / dev/null 2 > & 1

If [$?-eq 0]; then

Echo 192.168.1.$ip UP

Else

Echo 192.168.1.$ip DOWN

Fi

} &

Done

Wait

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