bionic
18.04 LTS		focal
20.04 LTS		impish
21.10		jammy
22.04 LTS		kinetic
22.10		Section Description
.....(1) - Executable programs or shell commands
.....(2) - System calls (functions provided by the kernel)
.....(3) - Library calls (functions within program libraries)
.....(4) - Special files (usually found in /dev)
netplan(5)netplan(5)netplan(5)netplan(5)netplan(5)(5) - File formats and conventions eg /etc/passwd
.....(6) - Games
.....(7) - Miscellaneous (including macro packages and conventions)
netplan(8)netplan(8)...(8) - System administration commands (usually only for root)