Linux alias list all

Linux command to list all available commands and aliases

For example, I’m defining the following alias: Then check the following scenarios: or specifically for alias: or to check whether it’s alias or regular command: To check if the alias is defined in your rc files, it needs to be checked manually e.g. by: Solution 4: Good bash-specific solution to check aliases is using array, e.g.: Question: For bash script, I can use to access arguments. Solution 2: Aliases are like commands in that all arguments to them are passed as arguments to the program they alias.

Get all aliases in linux shell

How to list all aliases defined in a shell. Like the command below to list all files/folders in a directory I have defined some alias in ~/.bashrc i want to list all that

command

Are you wondering if you have a UNIX alias already set for a specific command?

You can find it easily by issuing this on the command line:

command

This command will list all aliases currently set for you shell account.

Just type alias in terminal? This should give you all active aliases.

$alias alias ..='cd ..' alias . ='cd ../..' alias ga='git add' alias gc='git commit' alias gitlg='git log --graph --pretty=format:'\''%Cred%h%Creset - %C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)%Creset'\'' --abbrev- commit' alias gs='git st' alias ll='ls -l' alias ls='ls -F --color=auto --show-control-chars' 

“how to add alias in linux” Code Answer, linux add alias . shell by Jakes_Bakes_Code on May 18 2020 Donate . 0. how to add alias in linux . shell by Cautious Cod on Nov 11 2020 Donate . 0. Source: alvinalexander.com. C answers related to “how to add alias in linux” how to alias an awk command; C queries related to “how to add

Linux command to list all available commands and aliases

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 

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.

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 all commands by name

ls $(echo $PATH | tr ':' ' ') | grep -v '/' | grep . | sort 

Command line — How to find aliases?, Type alias, you’ll get a list of all defined ones in your environment. $ alias alias l=’ls -CF’ alias la=’ls -A’ alias ll=’ls -alF’ alias ls=’ls —color=auto’ List along the file they’ve been set in To find the files that your aliases have been defined in, use this solution, with a little bit altering it:

How can I check in my bashrc if an alias was already set

How can I check in my .bashrc if an alias was already set.

When I source a .bashrc file, which has a function name, say fun , and my current environment has an alias as fun also.

I tried unalias fun, but that will give me an error that fun not found when my environment wont have that alias already.

So in my .bashrc , in my fun function I want to check if alias was set, then unalias that.

If you just want to make sure that the alias doesn’t exist, just unalias it and redirect its error to /dev/null like this:

You can check if an alias is set with something like this:

alias foo >/dev/null 2>&1 && echo "foo is set as an alias" || echo "foo is not an alias" 

For each name in the argument list for which no value is sup- plied, the name and value of the alias is printed. Alias returns true unless a name is given for which no alias has been defined. 

Just use the command alias like

alias | grep my_previous_alias 

Note that you can actually use unalias , so you could do something like

[ `alias | grep my_previous_alias | wc -l` != 0 ] && unalias my_previous_alias 

That will remove the alias if it was set.

You can use type to see if the command exists, or whether is alias or not.

It’ll return error status, if the command is not found.

For example, I’m defining the following alias:

Then check the following scenarios:

$ type foo >/dev/null && echo Command found. || echo Command not found. Command found. 

or specifically for alias:

$ alias foo && echo Alias exists || echo Alias does not exist. 

or to check whether it’s alias or regular command:

To check if the alias is defined in your rc files, it needs to be checked manually e.g. by:

[ "$(grep '^alias foo=' ~/.bash* ~/.profile /etc/bash* /etc/profile)" ] && echo Exists. || echo Not there. 

Good bash-specific solution to check aliases is using BASH_ALIASES array, e.g.:

Linux — How can I automatically load alias on startup?, Just add the following code to your .bashrc file: # Alias definitions. # You may want to put all your additions into a separate file like # ~/.bash_aliases, instead of adding them here directly. # See /usr/share/doc/bash-doc/examples in the bash-doc package. if [ -f ~/.bash_aliases ]; then . ~/.bash_aliases fi

How to pass parameters to an alias?

For bash script, I can use «$@» to access arguments. What’s the equivalent when I use an alias?

Alias solution

If you’re really against using a function per se, you can use:

$ alias wrap_args='f()< echo before "$@" after; unset -f f; >; f' $ wrap_args x y z before x y z after 

You can replace $@ with $1 if you only want the first argument.

Explanation

This creates a temporary function f , which is passed the arguments.

Alias arguments are only passed at the end. Note that f is called at the very end of the alias.

The unset -f removes the function definition as the alias is executed so it doesn’t hang around afterwards.

Aliases are like commands in that all arguments to them are passed as arguments to the program they alias. For instance, if you were to alias ls to ls -la , then typing ls foo bar would really execute ls -la foo bar on the command line.

If you want to have actual control over how the arguments are interpreted, then you could write a function like so:

Adding to the present answers, an important thing to realize about how aliases work is that all the parameters you type after an aliased command will be used literally at the end. So there is no way to use alias for two commands (piped or not), out of which the first should interpret the parameters. To make it clear, here’s an example of something that would not work as expected:

alias lsswp="ls -l | grep swp" 

(an example inspired by this question) this will always use the output of ls -l performed in the current directory and do a grep on that — so using

would be equivalent to ls -l | grep swp /tmp/ and not ls -l /tmp/ | grep swp .

For all purposes where the arguments should be used somewhere in the middle, one needs to use a function instead of alias .

You don’t have to do anything, actually; aliases do this automatically. For instance:

$ alias less="less -eirqM" $ less foo.txt 

You will see foo.txt’s first page, and less will quit at EOF (-e), searches will be case-insensitive (-i), etc.

Bash — How to run an alias in a shell script?, In your shell script use the full path rather then an alias. In your shell script, set a variable, different syntax petsc=’/home/your_user/petsc-3.2-p6/petsc-arch/bin/mpiexec’ $petsc myexecutable Use a function in your script. Probably better if petsc is complex function petsc () < command 1 command 2 >petsc …

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Linux alias Command: How to Use It With Examples

Depending on the type of work you do on your Linux system, you may need to enter the same long and complicated commands frequently. The alias command lets you create shortcuts for these commands, making them easier to remember and use.

In this tutorial, we will show you how you can create, review, and remove command aliases in Linux.

• A system running a Linux distribution
• An account with sudo privileges
• Access to the terminal window or command line
• A text editor, such as Vim or nano

What Is an Alias in Linux?

In Linux, an alias is a shortcut that references a command. An alias replaces a string that invokes a command in the Linux shell with another user-defined string.

Aliases are mostly used to replace long commands, improving efficiency and avoiding potential spelling errors. Aliases can also replace commands with additional options, making them easier to use.

Linux Alias Syntax

The alias command uses the following syntax:

The different elements of the alias command syntax are:

• alias : Invokes the alias command.
• [option] : Allows the command to list all current aliases.
• [name] : Defines the new shortcut that references a command. A name is a user-defined string, excluding special characters and ‘alias’ and ‘unalias’, which cannot be used as names.
• [value] : Specifies the command the alias references. Commands can also include options, arguments, and variables. A value can also be a path to a script you want to execute.

Note: Enclosing the value in single quotation marks (‘) will not expand any variables used with the command. To expand the variables, use double quotation marks («).

Create Aliases in Linux

There are two types of aliases to create in Linux:

• Temporary. Add them using the alias command.
• Permanent. These require to edit system files.

Create a Temporary Alias in Linux

Use the alias command to create a temporary alias that lasts until the end of the current terminal session. For instance, creating c as an alias for the clear command:

Note: The alias command allows you to include multiple commands as the value by dividing them with the pipe symbol (|).

If you want to reference any additional command options when creating an alias, include them as a part of the value. For example, adding move as an alias for the mv command with the option of asking for confirmation before overwriting:

Note: Learn more about the mv command in our guide to moving directories in Linux.

Another use for aliases is to create a shortcut for running scripts. To do this, provide the absolute path to the script as the value:

alias frename='Example/Test/file_rename.sh'

In this example, using frename as a command runs the file_rename.sh bash script.

Create a Permanent Alias in Linux

To make an alias permanent, you need to add it to your shell configuration file. Depending on the type of shell you are using, use:

Start by opening the shell configuration file in a text editor. In this example, we are using the Bash shell and nano text editor:

Scroll down until you find a section that lists default system aliases. For ease of use, create a separate section with a descriptive comment and add your aliases using the alias command syntax.

#Custom aliases alias c='clear' alias move='mv -i' alias frename='Example/Test/file_rename.sh' 

Once you add all of the new alises, press Ctrl+X, type Y and press Enter to save the changes to the configuration file.

The new aliases automatically load in the next terminal session. If you want to use them in the current session, load the configuration file using the source command:

List All Aliases in Linux

Using the alias command on its own displays a list of all currently set aliases:

Another method is to add the -p flag. This option displays the list in a format suitable for input to the shell:

Remove Aliases in Linux

To remove an alias, use the unalias command with the following syntax:

For instance, to remove the frename alias:

Adding the -a option allows you to remove all aliases:

The example above shows how alias does not return any results after the unalias -a command.

After reading this tutorial, you should be able to use the alias command to create and manage aliases on your Linux system. This will help streamline your work and make terminal commands easier to use.

To learn more about other commands in Linux, check out our Linux commands cheat sheet.

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