How to Add SSH Public Key to Server
mhrsntrk / July 19, 2022
In order to access a remote server from your personal computer, you will need to upload your SSH public key to the authorized keys of the server.
- You should have an access to destination server
- Your destination server should have ssh enabled
- You should have generated public and private ssh keys (just use the command
ssh-keygen -t rsa -b 4096 -C "firstname.lastname@example.org)
Step 1: Get the SSH Public Key
On your public computer's terminal,
This command will return the SSH public key something similar to below example.
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQ3GIJzTX7J6zsCrywcjAM/7Kq3O9ZIvDw2OFOSXAFVqilSFNkHlefm1iMtPeqsIBp2t9cbGUf55xNDULz/bD/4BCV43yZ5lh0cUYuXALg9NI29ui7PEGReXjSpNwUD6ceN/78YOK41KAcecq+SS0bJ4b4amKZIJG3JWm49N1nszwUzxWOcsb0VR3UiCvvSYpmC+lA9JZJ25DL8D5nppOUD+DQhw48/U2EecvT//zE8wAilYhnwQp/U0PtHH7+l4QD4YK2LZVPFktK1pfxIsUf5evwrmEoNrWLjiwqXplCoQ2mPM/16pzBu++qb/JcUlKTfy2KsC2yygEGHOGMwipa13wM7DzMBuYwYvjPmzKR2JXRVYKyOetnFRJAZEXU6+QUm3V31f/T1QNSQIuykB5oi4LwYy8Jow8J11/bJmuwQTelAQ== username@hostname
You can copy the public key for the second step.
Step 2: Add the SSH Public Key
- Login to user account of the destination server using username and password or another SSH key that already has access to the destination server.
- Create the
authorized_keysfile by using below command
mkdir -p /home/user_name/.ssh && touch /home/user_name/.ssh/authorized_keys
- Open the
authorized_keysusing your favorite editor (you can use nano, vi, vim, nvim etc.) using the below command
- Paste the previously copied personal computer's SSH public key into the
authorized_keysfile (if there are any entries, paste it into a new line)
- Save and close
Step 3: Access the Server
You can use the below command to access the destination server
If everything works well, the server will ask your
passphrase for the SSH key.
I personally prefer
mosh instead of
ssh you can read my previous blog post to learn how to install and use