passwordless ssh¶

We often use SSH (Secure Shell) to remotely connect to servers via the terminal. If you’re tired of entering a password every time you log in, follow the steps below to enable passwordless login.

Add server info to config file¶

Open the SSH configuration file on your PC (the SSH client).

vim $HOME/.ssh/config

Add the server name, IP address (hostname), and the user ID for the server to the configuration file:

Host server1
HostName 8.8.8.8
User usr1

generate ssh key¶

Run the following command to generate new SSH keys:

ssh-keygen -t rsa

copy key to server¶

Run the following command to copy the key to server1, and enter your password when prompted:

ssh-copy-id server1

You should now be able to log in to the server without entering a password.

ssh server1

Note: if you are using powershell in windows, use cat ~/.ssh/id_rsa.pub | ssh usr1@HostName "mkdir ~/.ssh; cat >> ~/.ssh/authorized_keys"