SSH keys are extremely useful when you are establishing access to a remote server, which could well be a GPU cluster or cloud server running on AWS or Azure. Here are some easy to understand steps that can help you conveniently access your servers.
Step 1: Generate RSA folder
If not already done, create a
.ssh file in
~). Give it permission using
mkdir -p $HOME/.ssh chmod 0700 $HOME/.ssh
Step 2: Generate RSA keys. Public + Private
ssh-keygen -t rsa
Simple. There will be
id_rsa.pub appearing in
Step 3: Remote access
Your remote server almost certainly already has
~/.ssh all set up. If not, repeat steps 1 and 2 on the remote server.
If you don’t see
authorized_keys in the remote server, you can either make one and simply replace it with your local public key
or if there is one already, we append our public key to
cat $HOME/.ssh/id_rsa.pub | ssh username@server "cat >> .ssh/authorized_keys"
Step 4 (optional): Password-free ssh
Ok so you’re tired of typing in your password all the time and you just want a 1-liner.
~/.ssh and see if there is a
config file. If not, make one. The syntax is as follows:
Host INPUT_YOUR_PREFERRED_ALIAS Hostname INPUT_HOSTNAME user INPUTYOURUSERNAME
add this information in. Then do
and bingo! :)