This is a list of (console) tips and tricks I found useful for Linux.

1. Add progress bar to programs like md5sum:

   pv file | md5sum

2. Service menus don’t work in KF5 dolphin

   mkdir -p ~/.local/share/kservicetypes5/
   cp /usr/share/kde4/servicetypes/* ~/.local/share/kservicetypes5/
   kbuildsycoca5
   
   See https://lists.debian.org/debian-kde/2015/10/msg00003.html