# perl [root@Nagios ~]# ifconfig|perl -nle'/dr:([^ ]+)/&&print$1' 192.168.0.200 127.0.0.1 # perl,够帅 [root@Nagios ~]# ip addr|perl -pe '$_=/t (.*)\//?$1.$/:""' 127.0.0.1 192.168.0.200 # awk [root@Nagios ~]# ifconfig|awk -F':| *' '/inet /{print $4}' 192.168.0.200 127.0.0.1 # sed [root@Nagios ~]# ifconfig|sed -rn 's/.*r:([^ ]+) .*/\1/p' 192.168.0.200 127.0.0.1 # shell [root@Nagios ~]# ifconfig|grep 'inet addr:'|while read X Y Z; do echo $Y;done|(IFS=':';while read X Y;do echo $Y ;done) 192.168.0.200 127.0.0.1
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