pv
Table of Contents
1. Usage
gzip progress
pv access.log | gzip > access.log.gz # pv acts as cat here
Show disk io speed and compression speed
pv -cN source access.log | gzip | pv -cN gzip > access.log.gz # -N: Named, -c: Formatting
tar
tar -czf - . | pv > out.tgz # tar progress
Random
pv /dev/zero > /dev/null # for fun