If you want to see the current file in HEX mode, you can switch to Hex-Mode with the following command:
If you want to switch back, you can use the following command:
If you want to add another SSH key to the current shell session that is not the default one, you can do the following.
Export the additional key to the GIT SSH command to have it in scope for the current session.
export GIT_SSH_COMMAND="ssh -i ~/.ssh/filename"
Add the SSH key to the current shell session.
Besides the former command, you can still add the default ssh key with.