AutoSSH is a great tool to maintain a persistent SSH tunnel. Here is how to start AutoSSH on boot so that the tunnel can survive system reboot of the local machine.

If you follow my previous post about ssh/scp without password, but you got this error when you try to ssh to B on A, then you need to add RSA or DSA identities to the authentication agent. A ssh-add command on host A will solve your pain.

Suppose you have two machines: A and B. A is your work machine, you do most of your work on it. But B is a little special (e.g., connected to some specific hardware) that you need to ssh on it or copy some file from A to B from time to time. Here is the way that you can get rid of entering passwords every time you do ssh/scp.