Linux command to list all available commands and aliases

Question

Is there a Linux command that will list all available commands and aliases for this terminal session   As if you typed  a  and pressed tab  but for every letter of the alphabet  Or running  alias  but also returning commands   Why   I d like to run the following and see if a command is available   ListAllCommands   grep searchstr

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maybe i m misunderstanding but what if you press Escape until you got the Display All X possibilities

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Here s a solution that gives you a list of all executables and aliases   It s also portable to systems without xargs -d  e g  Mac OS X   and properly handles paths with spaces in them      bin bash  echo -n  PATH   tr     0    xargs -0 -n 1 ls  alias   sed  s alias               1      sort -u   grep        Usage  myscript sh  grep-options  pattern  e g  to find all commands that begin with ls  case-insensitive  do   myscript -i  ls

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Try to press ALT-   alt and question mark at the same time   Give it a second or two to build the list  It should work in bash

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There is the  type -a mycommand   command which lists all aliases and commands in  PATH where mycommand is used  Can be used to check if the command exists in several variants  Other than that    There s probably some script around that parses  PATH and all aliases  but don t know about any such script

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Add to  bashrc  function ListAllCommands       echo -n  PATH   xargs -d   -I    find    -maxdepth 1           -executable -type f -printf   P n    sort -u     If you also want aliases  then   function ListAllCommands       COMMANDS  echo -n  PATH   xargs -d   -I    find    -maxdepth 1           -executable -type f -printf   P n       ALIASES  alias   cut -d     -f 1      echo   COMMANDS    n   ALIASES    sort -u

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The others command didn t work for me on embedded systems  because they require bash or a more complete version of xargs  busybox was limited    The following commands should work on any Unix-like system   List by folder    ls   echo  PATH   tr            List all commands by name  ls   echo  PATH   tr            grep -v       grep     sort

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You can always to the following   1  Hold the  PATH environment variable value  2  Split by     3  For earch entry       ls    entry  4  grep your command in that output    The shell will execute command only if they are listed in the path env var anyway

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Here s a function you can put in your bashrc file    function command-search      oldIFS   IFS     IFS         for p in   PATH     do       ls  p   grep  1    done     export IFS   oldIFS      Example usage      command-search gnome gnome-audio-profiles-properties  gnome-eject  gnome-keyring  gnome-keyring-daemon  gnome-mount  gnome-open  gnome-sound-recorder  gnome-text-editor  gnome-umount  gnome-volume-control  polkit-gnome-authorization  vim gnome      FYI  IFS is a variable that bash uses to split strings   Certainly there could be some better ways to do this

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compgen -c  gt  list txt  amp  amp  wc list txt

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Alternatively  you can get a convenient list of commands coupled with quick descriptions  as long as the command has a man page  which most do    apropos -s 1     -s 1 returns only  section 1  manpages which are entries for executable programs      is a search for anything   If you use an asterisk  on my system  bash throws in a search for all the files and folders in your current working directory     Then you just grep it like you want   apropos -s 1      grep xdg   yields   xdg-desktop-icon  1  - command line tool for  un installing icons to the desktop xdg-desktop-menu  1  - command line tool for  un installing desktop menu items xdg-email  1         - command line tool for sending mail using the user s preferred e-mail composer xdg-icon-resource  1  - command line tool for  un installing icon resources xdg-mime  1          - command line tool for querying information about file type handling and adding descriptions for new file types xdg-open  1          - opens a file or URL in the user s preferred application xdg-screensaver  1   - command line tool for controlling the screensaver xdg-settings  1      - get various settings from the desktop environment xdg-user-dir  1      - Find an XDG user dir xdg-user-dirs-update  1  - Update XDG user dir configuration   The results don t appear to be sorted  so if you re looking for a long list  you can throw a   sort   into the middle  and then pipe that to a pager like less more most  ala   apropos -s 1      sort   grep zip   less   Which returns a sorted list of all commands that have  zip  in their name or their short description  and pumps that the  less  pager   You could also replace  less  with  PAGER and use the default pager

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You can use the bash 1  built-in compgen   compgen -c will list all the commands you could run  compgen -a will list all the aliases you could run  compgen -b will list all the built-ins you could run  compgen -k will list all the keywords you could run  compgen -A function will list all the functions you could run  compgen -A function -abck will list all the above in one go    Check the man page for other completions you can generate   To directly answer your question   compgen -ac   grep searchstr   should do what yout want

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Why don t you just type   seachstr   In the terminal   The shell will say somehing like   seacrhstr  command not found    EDIT   Ok  I take the downvote  because the answer is stupid  I just want to know  What s wrong with this answer    The asker said       and see if a command is available    Typing the command will tell you if it is available    Probably he she meant  with out executing the command   or  to include it in a script  but I cannot read his mind   is not that I can t regularly it is just that he s wearing a  mind reading deflector

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Try this script      bin bash echo  PATH    tr     n     while read e  do      for i in  e    do         if    -x   i   amp  amp  -f   i      then                  echo  i         fi     done done

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it depends  by that I mean it depends on what shell you are using   here are the constraints I see    must run in the same process as your shell  to catch aliases and functions and variables that would effect the commands you can find  think PATH or EDITOR although EDITOR might be out of scope   You can have unexported variables that can effect things  it is shell specific or your going off into the kernel   proc pid enviorn and friends do not have enough information   I use ZSH so here is a zsh answer  it does the following 3 things    dumps path dumps alias names dumps functions that are in the env sorts them   here it is   feed me          alias   cut -f1 -d    hash -f  hash -v   cut -f 1 -d    typeset  f    sort     If you use zsh this should do it

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shortcut method to list out all commands  Open terminal and press two times  tab  button  Thats show all commands in terminal

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For Mac users  find doesn t have -executable and xargs doesn t have -d    echo  PATH   tr       n    xargs -I    find    -maxdepth 1 -type f -perm    x

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It s useful to list the commands based on the keywords associated with the command   Use  man -k  your keyword   feel free to combine with   grep  another word    for example  to find a text editor  man -k editor   grep text

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The problem is that the tab-completion is searching your path  but all commands are not in your path    To find the commands in your path using bash you could do something like     for x in echo  PATH   cut -d    -f1  do ls  x  done

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in debian  ls  bin    grep  whatImSearchingFor

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Use  which searchstr    Returns either the path of the binary or the alias setup if it s an alias  Edit  If you re looking for a list of aliases  you can use   alias -p   cut -d  -f1   cut -d    -f2   Add that in to whichever PATH searching answer you like   Assumes you re using bash

[linux] Linux command to list all available commands and aliases

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