trusty
14.04 LTS		xenial
16.04 LTS		bionic
18.04 LTS		disco
19.04		eoan
19.10		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)(8) - System administration commands (usually only for root)