SSH Passwordless Login 🔐

• Video instructions

• Text instructions

1. Generate an SSH key pair
   Run the following command on the Terminal app on macOs or Command Prompt/PowerShell on Windows:

   ssh-keygen -t rsa
   

   After running this, two files are created in your ~/.ssh directory:

   File	Description
   id_rsa	Your private key (keep this secure and never share it)
   id_rsa.pub	Your public key (safe to share with servers)

2. Copy the public key id_rsa.pub to KLC

   On macOS or Linux:

   • Run the following command on the Terminal:

     ssh-copy-id your_netid@klc0202.quest.northwestern.edu
     

   Add manually (work for all OS):

   • On your local machine, open id_rsa.pub in a text editor and copy its contents.

   • Open an SSH session to KLC, create the .ssh directory if it doesn’t exist:

     mkdir -p ~/.ssh
     

   • Then paste the contents of id_rsa.pub into the file:

     nano ~/.ssh/authorized_keys
     

3. Update permission on KLC

   • Open an SSH session to KLC, update permission

     chmod 700 ~/.ssh
     chmod 600 ~/.ssh/authorized_keys