# Debian 12 Bookworm
  deb http://ftp.debian.cz/debian/               bookworm           main non-free-firmware contrib non-free
  deb http://security.debian.org/debian-security bookworm-security  main non-free-firmware contrib non-free
  deb http://ftp.debian.cz/debian/               bookworm-updates   main non-free-firmware contrib non-free
  # Debian 12 Bookworm Backports
  deb http://deb.debian.org/debian               bookworm-backports main non-free-firmware contrib non-free    

# Testing
#deb http://ftp.cz.debian.org/debian testing          main contrib non-free
# Unstable
#deb http://ftp.cz.debian.org/debian unstable         main contrib non-free
# Experimental
#deb http://ftp.cz.debian.org/debian experimental     main contrib non-free