ssh is pretty straight forward. I spend years typing long lines into the console or setting up complicated UI to manage my favorite ssh hosts. But there are some tricks, which could save you a lot of time.
At first, you need to create an ssh config file. If you are on a mac the file is located at /etc/ssh_config. All other unix-like machines should create the file in ~/.ssh/config. To check where the OS is looking for a config file you could also type
ssh -v test
It should return something like this:
OpenSSH_5.9p1, OpenSSL 0.9.8x 10 May 2012 debug1: Reading configuration data /etc/ssh_config
Make sure the file has read-write permission to only your user.
chmod 600 /etc/ssh_config
Now, configure a your favorite hosts in the ssh_config file
Host example HostName example.com Port 667 User username IdentityFile ~/.ssh/id_rsa
Now, instead of writing this:
ssh -i ~/.ssh/id_rsa -p 4431 email@example.com
You can write this:
As a small benefit this also works with scp.
scp /path/to/some/file example
Now let’s tunnel. If you are used to write this, to make a connection to a remote mySQL database
ssh -f -N -i ~/.ssh/id_rsa -L 9906:127.0.0.1:3306 firstname.lastname@example.org # -f puts ssh in background # -N makes it not execute a remote command
You should consider modifying your config like this:
Host tunnel HostName database.example.com IdentityFile ~/.ssh/id_rsa LocalForward 9906 127.0.0.1:3306 User username
To be able to finally establish a tunnel with this command:
ssh -f -N tunnel