How to add local loopback address on CentOS7?

1、临时添加

ip addr add 10.10.1.1/32 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=10.10.1.1

NETMASK=255.255.255.255

ONBOOT=yes

NAME=loopback1

[root@localhost network-scripts]# ip addr

1: lo: mtu 65536 qdisc noqueue state UNKNOWN

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

valid_lft forever preferred_lft forever

inet 10.10.1.1/32 brd 10.10.1.1 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 10.10.1.1

PING 10.10.1.1 (10.10.1.1) 56(84) bytes of data.

64 bytes from 10.10.1.1: icmp_seq=1 ttl=64 time=0.045 ms

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