ssh with Fabric using an SSH key

fabric_ssh.py

# Fabric can be used to run commands on a remote system over SSH.
# Sadly, its docuentation is a bit short for connecting using a private key file.

# Other options exist too, like this one using an SSH config file - https://gist.github.com/aubricus/5157931

import fabric

# Openssh formatted private key:
keyfile = "/path/to/your/privkey"
host = "fqdn"
user = "myname"

with fabric.Connection(host=host, 
                       user=user,
                       connect_kwargs={
                            "key_filename": keyfile
                       }
                       ) as sshconn:
    res = sshconn.run('uname -s')
    print(res.stdout)
    # >  Linux