pv is a nice little tool that will take stdin and make a nice little
progress bar and displaying time elapsed, percentage completed (if size is known)
current throughput rate and the total data transfered and with an ETA.
So if you have a tool that can output it’s result on standard output or read from standard input, one can get a progress bar!
It’s nice to know that “data is flowing”.
Send file with netcat and get a nice progressbar:
$ pv file | nc -w 1 example.com 3000
Get progress bar on tar output:
$ tar zcf - /directory | pv > backup.tar.gz
$ mysqldump database | pv > database.sql $ pv database.sql | mysql database
Limit the transfer rate and size of data over a pipe
$ cat /dev/zero | pv -L 3m -Ss 100m > /dev/null
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