Command to list all commands in linux

Ways to List All Available Commands and Aliases in Linux

In Linux, commands are the key things that are very interesting to run and execute the respective programs. Executing such commands and their aliases lets the user run many important tasks.

If you are curious about how to check all the commands and their aliases in Linux then let us explain the ways to list them. There are many ways to list them out of which one is to write the shell script. But Linux makes it easy with the keyword of the shell library which is compgen.

In this article, we are going to explain the ways to list all the available commands and aliases in Linux.

Using the .bashrc

One way is to write the shell script by adding it on .bashrc. Let us add a few lines of shell scripts so it can list the command and aliases.

To list all the command

Add these lines of shell script to list all the available commands.

function ListAllCommands < echo -n $PATH | xargs -d : -I <>find <> -maxdepth 1 \ -executable -type f -printf '%P\n' | sort -u >

To list all the aliases

Add these lines of shell script to list all the available aliases.

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 >

To list all the available commands and aliases in $PATH that is using mycommand, run the command as shown below.

Using built in shell library function

There is a built-in keyword of the shell library which is compgen that is very easy to use and execute to list all the commands and the aliases in Linux. Let us show you how to do it.

You are allowed to use any of the listed flags as per your requirement.

compgen -c → list all the commands that we can run.

compgen -a → list all the aliases that we can run.

compgen -b → list all the built-ins that we can run.

compgen -k → list all the keywords that we can run.

compgen -A function → list all the functions that we can run.

compgen -A function -abck → list all the above flags can do at once.

Here, we are going to list all the commands that we can run and aliases. So the -c and -a flag is used in such cases.

To list all the commands that we can run, let’s run the command as shown below.

To list the files on commands.txt, let’s print the contents with the cat command as shown below.

Here, we have successfully printed the available commands that we can run and there are many more commands which we could not capture on the screenshot.

To list all the aliases that we can run, let’s run the command as shown below.

To list the files on aliases.txt, let’s print the contents with the cat command as shown below.

Here, we have successfully printed the available aliases that we can run.

Creating a script with the use of compgen command is also one way to list the commands and aliases that we could run. Check the example below for further details regarding the script.

$ echo "compgen -c" > commands.sh

Here, we have created a list.sh script file with content “compgen -c” in it.

Let’s give the execute permission to the script with the command as shown below.

Now, run the script with the command as shown below.

Here, all the available commands are listed with the above script by using the compgen command.

Conclusion

In this article, you have learnt how to list all the available commands and aliases that we can run on Linux. Now, you are able to take the reference of the commands as per your requirements to complete the certain tasks. Thank you!

Karim Buzdar holds a degree in telecommunication engineering and holds several sysadmin certifications including CCNA RS, SCP, and ACE. As an IT engineer and technical author, he writes for various websites.

Источник

Shell command to list all commands in linux

Solution 3: Open terminal Ctrl + Alt + t and run this command: This will list all commands and a simple description of each command. In order to use that just create a shell file with the command shown below − Now insert the code shown below − And then give permission to the script before running it − Output In order to print the aliases, we just need to replace the code inside the sample.sh file to the code shown below − Output Solution 1: The solution I chose was to run the command: which appends all runnable commands, functions and aliases to a text file Taken from: https://stackoverflow.com/questions/948008/linux-command-to-list-all-available-commands-and-aliases

Linux command to list all available commands and aliases

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 

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 > 

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.

Unix / Linux — Useful Commands, Misc Commands ; 35. umask. Show the permissions that are given to view files by default ; 36. uname. Displays name of the current system ; 37. uptime. Gets the

How to view list of all commands in Linux Shell terminal

Force an External Mac Drive to Mount via Command Line Terminal Commands in Mac OS X
Duration: 1:24

The 50 Most Popular Linux & Terminal Commands

Learn the 50 most popular Linux commands from Colt Steele. All these commands work on Duration: 5:00:17

30 BASIC COMMANDS IN LINUX / UNIX

LINUX TERMINAL (UBUNTU) IN WINDOWS 10 || HOW TO USE LINUX TERMINAL IN WINDOWS
Duration: 40:39

How to list down all the available commands and aliases on Linux?

Linux provides us with a huge amount of commands along with their aliases that we can make use of. Although these commands serve different purposes we can still make use of all these commands anywhere we like in the terminal.

There are different ways with which we can interact with Linux commands. When it comes to listing all the available commands to the terminal we also have different approaches, either we can write a shell script by ourselves or we can use a shell library function that does that for us.

Let’s consider the first approaches where I’ll make use of a shell library keyword named compgen , which is a bash builtin command that can be used to list all the available commands.

Syntax

In the above syntax, the flag is a placeholder that can be replaced according to our needs.

The flag can have all these different values −

• -c − used to list all the commands you could run.
• -a − used to list all the aliases you could run.
• -k − used to list all the keywords you could run.
• -b − used to list all the built-ins you could run.
• -A function − used to list all the functions you could run
• -A function -abck − used to list everything shown above in one go.

Since, we only need to list the commands and their aliases we will make use of the -c and -a flags only.

In order to use that just create a shell file with the command shown below −

Now insert the code shown below −

And then give permission to the script before running it −

chmod 777 sample.sh ./sample.sh

Output

immukul@192 Downloads % ./sample.sh if then else elif fi case esac for select while until do done in . . .

In order to print the aliases, we just need to replace the code inside the sample.sh file to the code shown below −

Output

101 Bash Commands and Tips for Beginners to Experts, [ andrew@pc01 ~ ]$ myvar=»hello, world!» && echo $myvar hello, world! Env vars can also be defined using the export command. When

How to generate list of *all* available commands and functions?

The solution I chose was to run the command:

$ compgen -A function -abck | sort -u >> cmds.txt 

which appends all runnable commands, functions and aliases to a text file cmds.txt

Taken from: https://stackoverflow.com/questions/948008/linux-command-to-list-all-available-commands-and-aliases

Edit: added sort -u to command to remove duplicates as suggested by glenn jackman

It seems compgen outputs duplicates: perhaps programs that appear in multiple locations in your PATH:

$ [tab][tab] Display all 2328 possibilities? (y or n) 

$ compgen -A function -abck | wc -l 2647 $ compgen -A function -abck | sort -u | wc -l 2328 

I don’t know if this is important for you.

Read the Source Code of Shell Commands, The which command prints the full path of the shell commands, helping us to find out where it is on our file system. It searches through the

How to get a list of all the commands available for Ubuntu?

First Method

NB : Thanks to @Rmano. This method doesn’t work with zsh shell.

This will list all commands in your $PATH environment variable.

To store the result in a file you can redirect the output to a file.

Note that this will return an error if any directory names in your $PATH contain spaces. In that case, use this instead:

while read -d ':' dir; do echo "$dir"; done  

compgen -c | sort -u > commands && less commands 

whatis `compgen -c` > listOfCommands.txt 

#!/bin/sh for d in $; do for f in "$d"/*; do test -x "$f" && echo -n "$f " done done echo "" 

#!/bin/sh for d in $; do find $d -maxdepth 1 -type f -executable done 

(IFS=':'; find $PATH -maxdepth 1 -type f -executable -exec basename <> \; | sort | uniq) 

echo $PATH | tr ':' '\n' | xargs -n 1 ls -1