grep

1.grep
[root@lsr7 ~]# grep -n 'IPV6' /etc/sysconfig/network-scripts/ifcfg-ens33 //-n显示行数，显示带有ipv6的行数
7:IPV6INIT="yes"
8:IPV6_AUTOCONF="yes"
9:IPV6_DEFROUTE="yes"
10:IPV6_FAILURE_FATAL="no"
11:IPV6_ADDR_GEN_MODE="stable-privacy"
20:IPV6_PRIVACY="no"
[root@lsr7 ~]# grep -i 'ipv6' /etc/sysconfig/network-scripts/ifcfg-ens33 //显示ipv6，不区分大小写
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
IPV6_PRIVACY="no"
[root@lsr7 ~]# grep -w 'ipv6' /etc/sysconfig/network-scripts/ifcfg-ens33 //只显示ipv6（前后都没有东西）
[root@lsr7 ~]# grep -v 'IPV6' /etc/sysconfig/network-scripts/ifcfg-ens33 //显示除了IPV6的其它内容
TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
BOOTPROTO="dhcp"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
NAME="ens33"
UUID="b9c4daee-ad74-4641-b968-14131441c57c"
DEVICE="ens33"
ONBOOT="yes"
IPADDR="192.168.10.70"
PREFIX="24"
GATEWAY="192.168.10.2"
DNS1="192.168.10.2"
[root@lsr7 tmp]# grep -v [0-9] /etc/sysconfig/network-scripts/ifcfg-ens33 //显示文件中不带有数字的行
TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
BOOTPROTO="dhcp"
DEFROUTE="yes"
ONBOOT="yes"