Using Git on Ubuntu Server

How to use git on Ubuntu Server

You can use git to clone repositores e.g. from Github to the server.

1. Generate ed25519 key on the server

   ssh-keygen -t ed25519 -C "user / device info"

   Rename generated ssh keys to "githubkey"

   mv ~/.ssh/id_ed25519 ~/.ssh/githubkey
   mv ~/.ssh/id_ed25519.pub ~/.ssh/githubkey.pub

   Start SSH agent on background

   eval "$(ssh-agent -s)"

   Add githubkey to SSH agent

   ssh-add ~/.ssh/githubkey

2. Go to your Github.com account settings. Within section "Access", select "SSH and GPT keys". Add new SSH key of type "authentication" with a content get from following command processed on teh ubuntu server:

   cat ~/.ssh/githubkey.pub

3. Create a custom configuration file for SSH on the Ubuntu Server

   nano ~/.ssh/config

   Fill the file with following configuration for github.com (or alternative services)

   Host github.com
   HostName github.com
   User git
   IdentityFile ~/.ssh/githubkey

4. Check authentication to Git from Ubuntu Server

   ssh -T git@github.com

   You should get following response

   Hi <username>! You've successfully authenticated, but GitHub does not provide shell access.

5. Download a git repository through its SSH address

   git clone git@github.com:user/repository.git /path/to/clone