要找出主機的IP位址，方法有許多個，其中一個最簡單的是利用ifconfig

#! /bin/bash
shopt -s -o nounset
ListIPcmd="/sbin/ifconfig"

IP=$($ListIPcmd | grep 'inet addr:' | grep -v '127.0.0.1' | awk '{print $2}' | awk -F:  '{print $2}')
echo $IP
Last modification：April 6, 2018
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