• Adding IP address on RHEL/CentOS 7 server with nmtui
• Add IP in CentOS Server via Command Line
• Configure Network in CentOS 7 Server
• Add IP Address in CentOS Server
• How to Change Hostname and IP on a CentOS Server

To list all IP address in your server, run

ip addr | grep inet | awk '{ print $2; }' | sed 's/\/.*$//'

Example

[root@3blogger ~]# ip addr | grep inet | awk '{ print $2; }' | sed 's/\/.*$//'
127.0.0.1
::1
173.208.216.106
173.208.216.107
fe80::223:8bff:fee0:2adc
[root@3blogger ~]# 

Sites where you can check your IP

• http://checkip.amazonaws.com/
• https://www.hostonnet.com/ip
• https://api.ipify.org/