linux-sed常用命令

1、整行的替换新值

原来： KEEPALIVED_OPTIONS="-D
替换后：KEEPALIVED_OPTIONS="-D -f /usr/local/keepalived/etc/keepalived/keepalived.conf"

sed -i '/KEEPALIVED_OPTIONS=/c KEEPALIVED_OPTIONS="-D -f /usr/local/keepalived/etc/keepalived/keepalived.conf"' /usr/local/keepalived/etc/sysconfig/keepalived

2、查询删除行

原来：GATEWAY=192.168.10.2
删除后就没有了

sed -i '/GATEWAY/d' /etc/sysconfig/networkscripts/ifcfg-eth0