precise
12.04 LTS		trusty
14.04 LTS		xenial
16.04 LTS		artful
17.10		bionic
18.04 LTS		cosmic
18.10		Section Description
......(1) - Executable programs or shell commands
......(2) - System calls (functions provided by the kernel)
..cron(3)cron(3)cron(3)cron(3)(3) - Library calls (functions within program libraries)
......(4) - Special files (usually found in /dev)
......(5) - File formats and conventions eg /etc/passwd
......(6) - Games
......(7) - Miscellaneous (including macro packages and conventions)
cron(8)cron(8)cron(8)cron(8)cron(8)cron(8)(8) - System administration commands (usually only for root)