Tips&Tricks

1. DEBIAN – expired gpg key Skype repo.
   • wget https://repo.skype.com/data/SKYPE-GPG-KEY
   • sudo apt-key add SKYPE-GPG-KEY
2. Date install system?
   • # fs=$(df / | tail -1 | cut -f1 -d‘ ‚) && tune2fs -l $fs | grep created
3. Run X11 or Wayland?
   • loginctl show-session -p Type
   • loginctl show-session 1 -p Type (for OpenSuse 15.x)