Installing and Launching the Command Line on Your Computer

The command line -- sometimes also called the Terminalterminal or the shell -- is a way of navigating and using your computer that is similar to using the file browser (on mac: Finder, on Windows: File Explorer), but allows you to do many more actions.. It can be used to find, open and move files, run code, use version control software such as git, and install software.

The command line is extremely useful in computer programming, and is presumed knowledge in most software engineering roles. While many of the actions that the command line is used for can be carried out by other means, the command line has the advantage of being a single tool that can fulfil many roles. Because of how commonly used the command line is, many very useful software tools are released as 'Command Line Interfaces' -- computer software which is used by interacting with the command line.

The command line can be counter intuitive to use for the first time, and like many computer programming tools requires practice to be able to use fluently. It's also extremely useful, and presumed knowledge in software engineering jobs. The benefits of thisusing the command line are many -- and you don't need to use it for everything to get good results.

FindingInstalling thea Command Line

An important way to think about the command line is one way among many to navigate the computer. There are several different 'command lines' that you can have access to,to. For this guide, we will lookuse atTerminal for Mac users, and Git Bash for Windows users, which will allow us to use the mostsame common here.commands.

On a Mac

The most commonly used command line on Mac is called Terminal.Terminal. This comes installed by default on all macs.macs, Toso openyou thedon't Terminal, press CMD+Spaceneed to opendo the 'Spotlight Search'. Type 'Terminal' and press enter, and a text window will appear.

Sometimes, the first time you open a Terminal on a Mac, it might come up with some different messages. One important part of learning to use a Terminal is reading messages. Normally one of two can appear:anything.

On Windows

In this guide, we will give instructions for using a "Unix type" command line. This does not come installed by default on Windows systems, which instead have something called 'Command Prompt'. Both-- ofcommands theseused on Unix type command lines are different.

The command line we will install instead is called Git Bash.

Step 1: Download You need to download Git Bash by clicking the 'Windows' link on this website. This will take you to a page with multiple different waysoptions. To get the most recent installer, click the link circled in red below.

Step 2: Launch Installer Once your installer has downloaded, navigate to the 'Downloads' folder on your computer and double click the file called something like 'Git-2.49.0-64-bit.exe' (the numbers in yours might be different). This will open the installer.

Step 3: Click through Installer Click through each step, selecting the default options. When you reach the 'Select Components' option, make sure the following tools are selected.

Select Nano as the default editor. This is easier to use than Vim, which is set as the default. You can also select any other listed editor that you are comfortable with.

Leave everything else as default, and click through to the end!

Finding the Command Line

On a Mac

Step 1: To open the Terminal, press ⌘ and Space to open the 'Spotlight Search'. Type 'Terminal', and you should see a black icon with a white triangle.

Step 2: Press enter, and a window should open. Depending on your computer's settings, it will have either a white or a black background. It should say 'zsh' at the top, and have a ~ symbol, possibly combined with your username.

Step 3: Sometimes, the first time you open a Terminal on a Mac, it might come up with a message saying “The default interactive shell is now zsh.” -- this is fine and you don't need to do anything! This is just giving you some information about the samesoftware thingsthat --runs butthe incommand orderline.

On Windows

Step 1: To open Git Bash, navigate to teachthe peopleStart atmenu and start to type 'Git Bash'. Click on the sameapplication time,to open a window.

Step 2: You should see a window open, probably green, pink, yellow and white text on a black background. This will have your computer's name followed by a ~ symbol, and a $ with a flashing cursor next to it.

Congratulations, you've got a command line!