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SSH Settings

Ubuntu Settings

Add the following settings to your ~/.ssh/config file to simplify SSH connections:

~/.ssh/config
Host myserver
    HostName <ip>
    User <username>
    Port <port>

Directly type ssh myserver to connect to the server instead of using the full command. 

ssh myserver

Remote Port Forwarding

Forward a port from a remote server to your local machine. When you connect to <remote-port> on the remote server, it will forward the connection to <local-port> on your local machine.

ssh -N -f -R <remote-port>:localhost:<local-port> user@remote-host
Flags
  • -N: Do not execute a remote command.
  • -f: Run in the background.
  • -R: Specifies that the given port on the remote host is to be forwarded to the local machine.
  • Redirect the message to a file: 
    ssh -N -f -v -R <remote-port>:localhost:<local-port> user@remote-host > <file path> 2>&1
    • -v: Basic debugging output.
    • -vv: Medium debugging output.
    • -vvv: Detailed debugging output.

Turn Off Remote Port Forwarding

Find the process ID (PID) of the SSH connection and kill it:

ps aux | grep "ssh.*-R"

Then, use the kill command with the PID:

kill -9 <PID>