How to set local IP on Ubuntu Server?

Question

System administration

I connected at 192.168.0.107, then 192.168.0.105, now at 192.168.0.104. How can I set this value to some kind of constant.
I use a local area network with 1 router. The computer is connected via ethernet, and I connect to it via ssh via wifi.

Welcome to Ubuntu 18.04.2 LTS (GNU/Linux 4.15.0-51-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

  System information as of Wed Jun 12 14:14:37 MSK 2019

  System load:  0.16               Processes:                226
  Usage of /:   1.6% of 915.89GB   Users logged in:          1
  Memory usage: 26%                IP address for enp0s31f6: 192.168.0.104
  Swap usage:   0%                 IP address for docker0:   172.17.0.1

 * Ubuntu's Kubernetes 1.14 distributions can bypass Docker and use containerd
   directly, see https://bit.ly/ubuntu-containerd or try it now with

     snap install microk8s --classic

24 packages can be updated.
0 updates are security updates.


Last login: Wed Jun 12 14:14:06 2019 from 192.168.0.103

Answer 1

Set up either a static binding on the DHCP server or on ubuntu - google "ubuntu static ip".