核心提示：
1、临时添加
ip addr add .1/32 dev lo:1
重启失效
2、永久添加
cd /etc/sysconfig/network-scripts
cp ifcfg-lo ifcfg-lo:1
[root@localhost
1、临时添加
ip addr add .1/32 dev lo:1
重启失效
2、永久添加
cd /etc/sysconfig/network-scripts
cp ifcfg-lo ifcfg-lo:1
[root@localhost network-scripts]# cat ifcfg-lo:1
DEVICE=lo:1
IPADDR=.1
NETMASK=.255
onBOOT=yes
NAME=loopback1
[root@localhost network-scripts]# ip addr
1: lo:
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet .1/8 scope host lo
valid_lft forever preferred_lft forever
inet .1/32 brd .1 scope global lo:1
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
[root@localhost network-scripts]# ping -c1 .1
PING .1 (.1) 56(84) bytes of data.
64 bytes from .1: icmp_seq=1 ttl=64 time= ms
