Go into Your SSH Directory
Go into the ssh directory by running the the cd command also called the change directory command.
Generate an Empty File Called config
The Linux touch command can be used to update a file's time stamps, but in this case we're generating an empty config file to paste the information on the 4th step.
Open the config File With a Text Editor
Ever tried a command line text editor. For this tutorial give it a try! Let's "nano" into your config file and get editing.
Paste the Below Code into the config File
Paste the below configuration code into your file, if you followed our "Setup a SSH Key for Your GitHub Account" tutorial you're %100 good to go. If not just modify the IdentityFile section and point it to the proper RSA file.
Exit Out of Nano
Press the combination Ctrl + x to exit it will confirm to overwrite the file on the way out just hit enter and it's saved.
chmod Your File for Proper Permissions
chmod your file and assign the config file proper access permissions to keep it secure but readable. And you're all set. Repeat this process to add new accounts.