Learn Linux: Help

What is the man? Let's see what it says itself:

$ man -f man
man (1)              - an interface to the on-line reference manuals
man (7)              - macros to format man pages
man (1p)             - display system documentation

Command	Description
man	Explanation manual for commands and files
man -f or whatis	Short description for a command
man -k or apropos	Commands list containing the argument keyword

Examples:

$ man -f unzip
unzip (1)            - list, test and extract compressed files in a ZIP archive

$ man -k unzip
bunzip2 (1)          - a block-sorting file compressor, v1.0.6
funzip (1)           - filter for extracting from a ZIP archive in a pipe
gunzip (1)           - compress or expand files
hunzip (1)           - decompress and decrypt hzip files to the standard output
mtx-unzip (1)        - (sujet inconnu)
unzip (1)            - list, test and extract compressed files in a ZIP archive
unzipsfx (1)         - self-extracting stub for prepending to ZIP archives