Public domain
man - format and display the on-line manual pages
man 1 expand
man -a open
man bash | col -b > bash.txt
man -t bash > bash.ps
man -t bash | ps2pdf - > bash.pdf
whatis - search the whatis database for complete words.
whatis open
apropos - search the whatis database for strings
apropos "create a file"
man -k "create a file"
whereis - locate the binary, source, and manual page files for a command
whereis expand
which - shows the full path of (shell) commands.
which ls
type - indicate how each name would be interpreted if used as a command name
$ type expand
expand is /usr/bin/expand
$ type -a ls
ls is aliased to `/bin/ls $LS_OPTIONS'
ls is /usr/bin/ls
ls is /bin/ls
$ type -t ls
alias
$ type -t type
builtin
info - read Info documents
info bash
info info
info gcc
info libc
info gdb
info emacs
info "(standards)User Interfaces"
info coreutils 'printenv invocation'
Document directoris
/usr/doc/
/usr/doc/Linux-FAQs/
/usr/doc/Linux-HOWTOs
BY: Pejman Moghadam
TAG: man, whatis, apropos, whereis, which, type
DATE: 2011-05-28 08:10:08