Creating Permanent Bash Aliases in Linux

Posted on December 27, 2020

Prerequisites

This article only assumes that you are using your favorite distribution of the Linux operating system, and you are using Bash as your terminal of choice.

What is an alias?

Aliases can be thought of as a shortcut or a mask for other commands or combinations of commands. If you are an avid terminal user and find yourself frequently using multiple commands in succession then aliases can be a prime way to increase your efficiency by combining these under a single alias.

You can also use aliases to point new "commands" to existing commands. For example, in this tutorial we will predominantly be looking at how I can run the Python3 command by using just 'python' since I do not utilize Python2 and wish to use the command python instead of python3..

Prepping Your .bashrc File

While you can include aliases directly into your .bashrc file, we will be taking a look at creating an external file to keep things organized. An organized configuration is a happy configuration.

Using your preferred editor of choice such as vim or nano, open up your .bashrc file. The example below will use nano.

$ sudo nano ~/.bashrc

You now want to scan your .bashrc file for the following contents.

if [ -f ~/.bash_aliases ]; then
    . ~/.bash_aliases
fi

This very simple bit of script basically first checks to see if the file ~/.bash_aliases exist and if it does, the . operator means to source that file. This operationally is the same as the following command:

$ source ~/.bash_aliases

There's a possibility by default, that your system does not have the referenced .bash_aliases file and you will need to create it. The following command will take care of creating it if it does not exist, or opening it for editing if it does exist.

$ nano ~/.bash_aliases

Adding aliases

Adding aliases from this point is extremely straight forward and rather than a long textual explanation, I'll simply show some examples.

# Alias the python3 command as python
alias python='python3'

# Shortcut for starting Apache
alias apache-start='sudo service apache2 start'

# Shortcut for starting Apache
alias apache-stop='sudo service apache2 stop'

# Shortcut for adding all unstaged changes to Git commit
alias git-commit-all=`git add . && git commit`

Conclusion

Once you are finished adding any aliases you wanted to create, you can finalize the changes by running the source command on the new .bash_aliases file.

$ source ~/.bash_aliases

Now you are one step closer to being a Bash guru and master Linux user.