IT - Linux: Network set-up

 Additional IP address

• Fedora 36 / 37 / 38 / 39
• Option 1:
  
  sudo nmcli con mod <interface-name> +ipv4.addresses "<ip-address>/<mask>"
  
  $ sudo nmcli con mod enp4s0f0 +ipv4.addresses "192.168.0.15/24"
  $ sudo nmcli con mod enp4s0f0 ipv4.method manual
  $ sudo nmcli con mod enp4s0f0 ipv4.dns "1.1.1.1 8.8.8.8 8.8.4.4"
• Option 2:
  
  vi /etc/NetworkManager/system-connections/<interface-name>.nmconnection and update entry under [ipv4]
  
  [ipv4]
  address1=ip-address/bit-mask[,default-gateway]
  dns=ip-address;[ip-address;[ip-address;]]
  method=manual
  
  For example:
  
  $ nmcli
  enp3s0f0: connected to enp3s0f0
•         "Broadcom and subsidiaries NetXtreme BCM57766"
          ethernet (tg3), 38:C9:86:30:35:8C, hw, mtu 1500
          ip4 default, ip6 default
          inet4 192.168.0.208/24
          route4 192.168.0.0/24 metric 100
          route4 192.168.0.0/24 metric 100
          inet6 2a02:8109:aa3f:aa58::b1fe/128
          inet6 fe80::3ac9:86ff:fe30:358c/64
          route6 fe80::/64 metric 1024
          route6 2a02:8109:aa3f:aa58::b1fe/128 metric 100
          route6 default via fe80::4e12:65ff:fe0b:ad86 metric 100
  
  lo: unmanaged
          "lo"
          loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536
  
  DNS configuration:
          servers: 192.168.0.1
          interface: enp3s0f0
  
          servers: 2a02:8109:aa3f:aa58:4e12:65ff:fe0b:ad86
          interface: enp3s0f0
  ...
  $ sudo vi /etc/NetworkManager/system-connections/enp3s0f0.nmconnection

[ipv4]
method=manual
address1=192.168.0.16/24,192.168.0.1
dns=8.8.8.8;8.8.4.4;1.1.1.1;