This post appeared originally in our sysadvent series and has been moved here following the discontinuation of the sysadvent microsite
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 transferred 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”.
Other examples
Send file with Netcat and get a nice progress-bar:
pv file | nc -w 1 example.com 3000
Get progress bar on tar output:
tar zcf - /directory | pv > backup.tar.gz
MySQL dump/restore:
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
Creating and using a script to Install Arch linux through wifi
There are many different ways to create a bootable USB flash drive. I will in this guide, not show you how to create a bootable USB flash drive.
After rebooting your computer from the USB flash drive and when the installation medium’s boot loader menu appears
The default console key-map is US. You can change that using for example:
loadkeys sv-latin1 Use iwctl to connect to a wireless network ... [continue reading]