Write Git commands to add a file and commit on a remote machine accessible only via SSH.

To add a file and commit on a remote machine accessible only via SSH, you can use the following sequence of commands:

# Connect to the remote machine via SSH
ssh user@remote-host

# On the remote machine, add the file to the Git index
git add path/to/file

# Create a commit with a message
git commit -m "Your commit message"

# Push the changes to the remote repository
git push origin branch

If you want to perform everything in one step without interactive login, you can use SSH to execute commands remotely:

ssh user@remote-host 'cd /path/to/repository && git add path/to/file && git commit -m "Your message" && git push origin branch'

It is important that the remote machine is configured with access to the repository and the SSH key is properly set up.