CentOS 7 set static ip address

  1. Set IP address in /etc/sysconfig/network-scripts/ifcfg-eth0 
    # find / -name ifcfg-eth0   (find the file)
# vi /etc/sysconfig/network-scripts/ifcfg-eth0

TYPE=Ethernet
DEVICE=eth0
HWADDR=00:15:5D:8B:23:20
UUID=876fff11-041 ...
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=static
IPADDR=192.168.1.59
NETMASK=255.255.255.0
GATEWAY=192.168.1.1
DNS1=8.8.8.8
DNS2=8.8.4.4

Save and quit:  type :wq
    Now restart the network services. 
    [root@hostname~]# service network restart
    Verify the IP address 
    [root@hostname~]# ip addr

  2. Find public IP addresses of the server 
    # curl ifconfig.me

or
# curl ident.me
# curl -4 icanhazip.com
# curl ipinfo.io/ip
# curl bot.whatismyipaddress.com
# curl ipecho.net/plain