Getting Started With the Terminal

The other day Carl made a useful comment:

Terminals and command lines scare me. Do you have any dev tips on getting started with these or know any good resources?

And it made me realize, I also was scared to use the Terminal at one point. It is one of these things wherein the beginning, you just don't know what's happening.

So let's walk through some basic commands today, which will make us more comfortable in using the Terminal.

Which Terminal to Use?

Perhaps a good starting point is which Terminal to use, to be honest, it's much of a preferred choice than actually making a difference. But I use iTerm2 which works beautiful!

If you rather stick to another choice or the default Terminal, be my guest, it won't make a difference in what we are going to do today.

Basic Terminal Commands

Oke, let's get cracking on some commands.

Bash Change Directory

cd command means change-directory, and it is the same as clicking on a folder on your regular desktop.

For instance:

cd Desktop // move into the desktop "folder"

We can also go up one level by using ..

cd ..
// Or even multiple levels
cd ../../

We can always go back to the starting point by using cd without arguments.

cd

Bash Where are We?

Every now and then, you forgot where you are, and you want to know what the current folder is.

You can use the pwd command Print Working Directory

pwd // Return something like: /Users/chrisbongers/Desktop

Bash List

Another handy command is ls it means list and can we used to show folders inside the directory we are in.

ls // Show current directory
ls .. // Show parent directory
ls Desktop // Show specific directory

Bash Creating Folders

Sometimes it's easier to create a folder in the Terminal because you are already there.

We can use mkdir make directory for this.

mkdir NewApp

Bash Removing

Be careful when using remove commands. The Terminal is strong and can remove system files, so use these with care.

We can use rmdir Remove Directory to remove a folder

rmdir NewApp

Or we can use rm Remove in general

rm testfile.txt

For the rm command we can give it the -r parameter which stands for recursive it will delete everything inside the folder you pass

rm -r NewApp

Bash Copy

We can also copy folders and files with the Terminal by using the cp Copy command

cp testfile.txt test2.csv

Where the first argument is the source and the second the destination file.

We can also copy a complete folder and contents:

cp -r NewApp TestApp

Bash Move

Another excellent command is mv Move. It works the same as the cp one but will move the elements instead of copying them.

mv testfile.txt Desktop/testfile2.txt

As you can see, we can even move and rename.

Bash Creating Files

Perhaps the most interesting one is the ability to create files. There are multiple ways of creating files, the most common is touch, but my personal favorite is nano.

Nano works great because it's generic, it can create but also edit a file at the same time.

nano testfile.txt // Will create the file and open it!

Once you opened a file in nano you can type whatever you want, and once your done, use CTRL+X to close and save the file.

Resume

I hope these Terminal commands were helpful, and I challenge you to have a play around with these.

Let me know in the comments if there are any really good ones I might have missed.

Thank you for reading, and let's connect!

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