When you use man pages, you will notice some numbers at the beginning and at the end of the man page like this:
LS(1) User Commands LS(1) NAME ls - list directory contents SYNOPSIS ls [OPTION]... [FILE]... =========================//============================= SEE ALSO The full documentation for ls is maintained as a Texinfo manual. If the info and ls programs are properly installed at your site, the com? mand info ls should give you access to the complete manual. ls 5.97 January 2007 LS(1)
that number LS(1) indicates the section where man page of LS belongs.
the most common sections and what they mean are:
- User Commands
- System Calls
- File Formats
- System Administration
These indicates you also what is the command for, as an example ls belongs to section 1, so it is a command anyone can run, while fsck belongs to section 8 which means only root can run it.