Page 100 - RHEL8 BOOK

11. Add default gateway permanently?
[root@ sun ~]# route add default gw 192.168.1.100 enp0s3
[root@ sun ~]# nmcli con mod enp0s3 ipv4.gateway 192.168.1.100
# cat /etc/sysconfig/network
GATEWAY=192.168.1.100

12. To see the Gateway
[root@ sun ~]# route –nv

13. DNS ip address file location
[root@Sun ~]# nmcli con mod enp0s3 ipv4.dns "8.8.8.8"
or
[root@Sun ~]# vi /etc/resolv.conf
nameserver 8.8.8.8

14. To verify the status of Network Manager service:
[root@sun ~]#systemctl status NetworkManager.service

15. To check which network interface is managed by Network Manager, run:
[root@sun ~]#nmcli device status
or nmcli dev status (Network Manager Command Line Interface)

16. Create a Virtual ip address
[root@ sun ~]# ifconfig enp0s3:0 192.168.1.2 netmask 255.255.255.0

17. Restart the Service to activate the new ip address
[root@Sun ~]# systemctl restart NetworkManager
[root@Sun ~]# systemctl restart network.service

18. Permanent enable the service
[root@Sun ~]# systemctl enable NetworkManager
[root@ sun ~]#systemctl enable network
[root@ sun ~]#chkconfig network on

19. To Set or view the network parameters. Or Status
[root@Sun ~]# ethtool enp0s3
[root@ sun ~]#systemctl status network.service

20. To disable the NIC card
[root@Sun ~]# ifdown enp0s3

21. To enable the NIC card
[root@Sun ~]# ifup enp0s3

22. To check the NIC card whether detected or not
[root@Sun ~]# ethtool enp0s3

23. To see the IP address files location
[root@Sun ~]#cd /etc/sysconfig/network-scripts

S. Pradhan
(MCA, MBA-IT, BCA, CCNA, MCSA 2012, RHCE, ETHICAL HACKING)
Email Id:-spradhan.iiht@gmail.com
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