*nix commands are are divided into sections. Click on the main section or sub-section to get the command listing.

Main section Sub-section Section description # of commands
1 1
1fun
1gmt
1p
1posix
1ssl
Executable programs or shell commands
1460
25
62
8
175
52
2 2
2freebsd
2fun
System calls (functions provided by the kernel)
445
315
1
3 3
3erl
3freebsd
3fun
3G
3pm
3posix
3readline
Library calls (functions within program libraries)
2638
586
1
2
362
313
1123
2
4 4
4freebsd
Special files (usually found in /dev)
60
664
5 5
5fun
5ssl
File formats and conventions eg /etc/passwd
269
1
2
6 6
6fun
Games
6
1
7 7
7gcc
7posix
7ssl
Miscellaneous (including macro packages and conventions), e.g. man(7), groff(7)
379
3
101
1
8 8
8fun
System administration commands (usually only for root)
578
10
99freebsd
Kernel routines [Non standard]
1350