SSH is a secure alternative to username/password authorization
SSH keys are generated in public/private pairs. Your public key can be shared with others. The private keys stays on your machine only.
The ‘ssh’ and ‘scp’ utilities are secure alternatives to logging into, and copying files to/from remote machine
When we talk of ‘job control’, we really mean ‘process control’
A running process can be stopped, paused, and/or made to run in the background
A process can be started so as to immediately run in the background
Paused or backgrounded processes can brought back into the foreground
Process information can be inspected with ps
ps