增加IP
1.查看当前IP信息：
 
ifconfig
 
[root@vlmwxlzjhculhkx ~]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 100.100.100.100  netmask 255.255.255.0  broadcast 100.100.100.255
        inet6 xx::xx:xx:xx:xx  prefixlen 64  scopeid 0x20<link>
        ether xx:xx:xx:xx:xx:xx  txqueuelen 1000  (Ethernet)
        RX packets 1072491326  bytes 71902281992 (66.9 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 15681045  bytes 18917811748 (17.6 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
2.增加IP100.100.100.101 和子网掩码
 
ifconfig eth0:1 100.100.100.101 netmask 255.255.255.0 up
 
[root@vlmwxlzjhculhkx ~]# ifconfig eth0:1 100.100.100.101 netmask 255.255.255.0 up
1
3.查看
 
[root@vlmwxlzjhculhkx ~]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 100.100.100.100  netmask 255.255.255.0  broadcast 100.100.100.255
        inet6 xx::xx:xx:xx:xx  prefixlen 64  scopeid 0x20<link>
        ether xx:xx:xx:xx:xx:xx  txqueuelen 1000  (Ethernet)
        RX packets 1072491326  bytes 71902281992 (66.9 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 15681045  bytes 18917811748 (17.6 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
 
eth0:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 100.100.100.101  netmask 255.255.255.0  broadcast 100.100.100.255
        ether xx:xx:xx:xx:xx:xx  txqueuelen 1000  (Ethernet)
eth0:1就是新加的IP了
 
删除IP
1.查看当前IP
[root@vlmwxlzjhculhkx ~]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 100.100.100.100  netmask 255.255.255.0  broadcast 100.100.100.255
        inet6 xx::xx:xx:xx:xx  prefixlen 64  scopeid 0x20<link>
        ether xx:xx:xx:xx:xx:xx  txqueuelen 1000  (Ethernet)
        RX packets 1072491326  bytes 71902281992 (66.9 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 15681045  bytes 18917811748 (17.6 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
 
eth0:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 100.100.100.101  netmask 255.255.255.0  broadcast 100.100.100.255
        ether xx:xx:xx:xx:xx:xx  txqueuelen 1000  (Ethernet)
2.记住要删除的IP，比如我们要删除100.100.100.101
ifconfig eth0:1 down
[root@vlmwxlzjhculhkx ~]# ifconfig eth0:1 down