artful
17.10		precise
12.04 LTS		trusty
14.04 LTS		xenial
16.04 LTS		zesty
17.04		Section Description
dd(1), dd(1)dd(1), dd(1)dd(1), dd(1)dd(1), dd(1)dd(1), dd(1)(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)
.....(5) - File formats and conventions eg /etc/passwd
.....(6) - Games
.....(7) - Miscellaneous (including macro packages and conventions)
.....(8) - System administration commands (usually only for root)