How to restart ssh-agent without relogin

Question

I accidentally killed my ssh-agent, how do I restart it without having to reconnect ?

I tried this but it does not work :

$ eval $(ssh-agent -s)
Agent pid 8055

Then, I open a new Gnome terminal with CTRL+SHIFT+N from the previous terminal window and type :

$ ssh-add
Could not open a connection to your authentication agent.

But if I open a new Gnome terminal from my first Gnome terminal by typing :

$ gnome-terminal &

then this new window is able to connect to the ssh-agent.

Is it not possible for all my Gnome terminals to "see" the ssh-agent without having to reconnect to the PC/server ?

Answer 1

This doesn't work as you supposed. ssh-agent overwrites the configuration.

TO FIX THIS---

Find agent:

eval "$(ssh-agent -s)"

Agent pid 9546

Kill PID:

kill -9 9546

THEN YOU CHECK

ssh git@gitlab.com-test

ssh git@gitlab.com

It should work now.

Answer 2

Try restart using the following command:

sudo service ssh restart

The private/public RSA SSH keys are located in ~/.ssh/id_rsa and ~/.ssh/id_rsa.pub, respectively. You can transfer the public key to another machine to connect to it through public key authentication. This can be done via ssh-copy-id like so:

ssh-copy-id username@host

Or you can append your public key (id_rsa.pub) to the server's /home/username/.ssh/authorized_keys file, which is in essence what ssh-copy-id does.

Answer 3

killall ssh-agent; eval `ssh-agent`