With the terminal: apropos a command to know what another command does

It is normal that in the daily use of our distribution, we do not use even half of the options or commands that we have available, right?

By chance I meet the command about Which of course I did not know and is really useful. Why? See for yourself. Open a terminal and type:

$ apropos

It returns to me:

apropos what?

It actually returns that to me because I missed passing a parameter, which is none other than the name of another command. For example:

$ apropos apropos
apropos (1)          - buscar entre las páginas del manual y las descripciones

Another example:

$ apropos rmdir
rmdir (1)            - borra directorios vacíos
rmdir (2)            - borra un directorio

I leave you the image of how it looks

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  1.   Raist said

    whatis is similar, they have identical outputs, but with the case of »whatis man || apropos man» for example, it's another story.

    By the way: "man -k, -apropos equivalent to apropos"
    »Man -f, –whatis equivalent to whatis»

  2.   Courage said

    In order not to create confusion with the title, you should have put a comma after apropos carcamal

  3.   Lucas Matias said

    : D, You don't miss one.
    Very useful command I will try it 😉

  4.   fredy said

    I like it, it is quite useful and I did not know it.

  5.   hypersayan_x said

    Actually "apropos" is used to search for pages in the "man" that have a certain keyword for example "apropos directories".
    Also if you look, next to the command name there is a number in parentheses, that number in a section within the manual for that command and they have different meanings:

    1 - Commands available to users.
    2 - You call the system of * nix and C.
    3 - C library routines for programs written in C.
    4 - Special file names.
    5 - File formats and file conventions used by * nix.
    6 - Games.
    7 - Word processing packages.
    8 - System and procedural administration commands.

    If I want to access for example section 2 of the rmdir manual I do:

    man 2 rmdir

    In summary, with "apropos" I see which command I use to do X action, and with "man npage X" the corresponding page of the command.

  6.   aer0 said

    The interesting thing about GNU / Linux systems can always surprise you even if you think you know everything, a good very useful command.

  7.   Argenis Miranda said

    Excellent publications.