sedで特定の文字列を抽出 - Qiita

[root@localhost ~]# /usr/lib64/nagios/plugins/check_icmp -H 192.168.0.1 > /tmp/a.txt [root@localhost ~]# [root@localhost ~]# cat /tmp/a.txt OK - 192.168.0.1: rta 0.410ms, lost 0%|rta=0.410ms;200.000;500.000;0; pl=0%;40;80;; rtmax=0.723ms;;;; rtmin=0.180ms;;;; [root@localhost ~]# [root@localhost ~]# cat /tmp/a.txt | sed -r 's/.*rta=([0-9\.]+).*;/\1/' 0.410 [root@localhost ~]# cat /tmp/a.txt | sed -