The Google Authenticator is an open-source module that includes implementations of one-time passcodes (TOTP) verification tokens developed by Google.| How to Setup Two-Factor Authentication For SSH In Linux
Pv is a terminal-based tool that allows you to monitor the progress of data such as coping/moving/backing up files that are being sent through a pipe.| How to Monitor Progress of (Copy/Backup/Compress) Data using ‘pv’ Command