[root@test ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:D8:AE:2D
inet addr:10.0.0.152 Bcast:10.0.0.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fed8:ae2d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:113 errors:0 dropped:0 overruns:0 frame:0
TX packets:106 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:13135 (12.8 KiB) TX bytes:15388 (15.0 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)Copy eth0 into eth0:18 and modify it.
[root@test ~]# cp -p /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:18
[root@test ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0:18
DEVICE=eth0:18
TYPE=Ethernet
UUID=aac352a2-6cab-4064-b2bd-2593d3b0cacf
ONBOOT=no
NM_CONTROLLED=yes
BOOTPROTO=none
HWADDR=00:0C:29:D8:AE:2D
IPADDR=10.0.0.153
PREFIX=24
GATEWAY=10.0.0.129
DNS1=8.8.8.8
DOMAIN=example.com
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System eth0"Startup the interface
[root@test ~]# ifup ifcfg-eth0:18
Determining if ip address 10.64.43.222 is already in use for device bond0...Check interfaces again
[root@test ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:D8:AE:2D
inet addr:10.0.0.152 Bcast:10.0.0.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fed8:ae2d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:182 errors:0 dropped:0 overruns:0 frame:0
TX packets:165 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:19209 (18.7 KiB) TX bytes:21688 (21.1 KiB)
eth0:18 Link encap:Ethernet HWaddr 00:0C:29:D8:AE:2D
inet addr:10.0.0.153 Bcast:10.0.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)