How to use pv command with progress bar

How_to_use_pv_command_with_progress_bar.txt

I found a nice package called pv that implements a command line progress bar to use in copying files and creating tar files.
Here is the URL I found that describes the pv command:

https://www.tecmint.com/monitor-copy-backup-tar-progress-in-linux-using-pv-command/

Here are some example useage of pv.

# pv opensuse.vdi > /tmp/opensuse.vdi

# pv /var/log/syslog | zip > syslog.zip

# pv -p /etc/hosts | wc

# tar -czf - ./Downloads/ | (pv -p --timer --rate --bytes > backup.tgz)

# tar -czf - ./Documents/ | (pv -n > backup.tgz) 2>&1 | dialog --gauge "Progress" 10 70