SSH Config file

SSH Config file

Tired of writing hostnames and ports when using ssh? Then start using ssh config file!

I’ve recently found out that there is the possibility to define frequently used hosts in an ssh configuration file which get’s looked up each time you use ssh.

Here’s an example of a ssh config entry:

Host raspberry
    HostName 192.168.1.10 # hostname used by ssh
    User root
    IdentityFile ~/.ssh/rasp.key

#or

Host ftpserver
    HostName myhostname.domain.me
    User vince

With this configuration, connecting to the raspberry host is going to be as simple as:

ssh raspberry

Of course there are a lot of other options, one that I use frequently is the ProxyCommand, which allows you to specify the ssh command to be executed. In my case I use this when I need to connect to a host using a second machine, so for example : my_pc -> jump_machine -> final_destination. Also showed in the image here below:

 

sshConfig
Using ssh_config to bypass hosts

This can be achived with this set-up:

Host final_destination
    User vince
    ProxyCommand ssh -q -l myusername -W final_destination:22 jump_machine

So there you go! A complete list of possible options/attributes for your ssh config file can be found here.

Bye


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