There are certain tasks that I do every couple of months or even only every couple of years. One of those is setting up a new computer for development work. Then I struggle with some basic setup again as I have forgotten how I did it last time. One of those tasks is setting up OpenSSH.
In the folder
%USERPROFILE%/.ssh create the
for OpenSSH and add the configuration for commonly used hosts.
Host github.com User git IdentityFile ~/.ssh/my_github_identity.key IdentitiesOnly yes
This associates the
my_github_identity.key private key file with the
git when accessing github repositories through OpenSSH.
I also add hosts as needed. For example, development machines on the local network, accessed through SSH.
Host raspberrypi User martin IdentityFile ~/.ssh/local_machines_identity.key IdentitiesOnly yes
SSH Authentication Agent
To avoid being asked the passphrase for the private key every time it is used we can add that key to the ssh authentication agent.
The ssh agent is available as a Windows service that needs to be enabled. Go to Services and find “OpenSSH Authentication Agent” and set its startup type to “Automatic”. Also manually start it for the first time.
Now we can add the private key to the agent:
This should ask for the passphrase of the private key again. From now on, the agent will take care of authentication when the key is used. This is convenient when working with Git CLI or any Git GUI that uses OpenSSH.