The command line is a tool or interface for interacting with a computer using only text rather than the mouse.
Command-Line is an essential tool for software development. We can execute a wide variety of programs on our computer through this. In this tutorial, we are going to learn the necessary UNIX commands for development.
UNIX command is a type of command that is used in LINUX and macOS.
To run some basic UNIX command in windows you can download Git Command Line Interface from Git SCM.
✨ Let's start to learn (can use it as a reference guide)🏃♂️🏃♂️🏃♂️...
On the command line, it's important to know the directory we are currently working on. For that, we can use
It shows that I'm working on my Desktop directory.
To see the list of files and directories in the current directory use
ls command in your CLI.
Shows all of my files and directories of my Desktop directory.
- To show the contents of a directory pass the directory name to the
- Some useful
|ls -a||list all files including hidden file starting with '.'|
|ls -l||list with the long format|
|ls -la||list long format including hidden files|
We can create a new folder using the
mkdir command. To use it type
ls command to see the directory is created or not.
I create a cli-practice directory in my working directory i.e. Desktop directory.
It's used to change directory or to move other directories. To use it type
pwd command to confirm your directory name.
Change my directory to the cli-practice directory. And the rest of the tutorial I'm gonna work within this directory.
We have seen
cd command to change directory but if we want to move back or want to move to the parent directory we can use a special symbol
cd command, like
We can create an empty file by typing
touch file_name. It's going to create a new file in the current directory (the directory you are currently in) with your provided name.
I create a hello.txt file in my current working directory. Again you can use
ls command to see the file is created or not.
Now open your hello.txt file in your text editor and write Hello Everyone! into your hello.txt file and save it.
We can display the content of a file using the
cat command. To use it type
Shows the content of my hello.txt file.
To move a file and directory, we use
mv file_to_move destination_directory, you can move a file to the specified directory.
mv directory_to_move destination_directory, you can move all the files and directories under that directory.
Before using this command, we are going to create two more directories and another txt file in our cli-practice directory.
mkdir html css
Yes, we can use multiple directories & files names one after another to create multiple directories & files in one command.
Move my bye.txt file into my css directory and then move my css directory into my html directory.
mv command can also be used to rename a file and a directory.
You can rename a file by typing
mv old_file_name new_file_name & also rename a directory by typing
mv old_directory_name new_directory_name.
Rename my hello.txt file to the hi.txt file and html directory to the folder directory.
To do this, we use the
- You can copy a file by entering
cp file_to_copy new_file_name.
Copy my hi.txt file content into hello.txt file. For confirmation open your hello.txt file in your text editor.
- You can also copy a directory by adding the
cp -r directory_to_copy new_directory_name.
-r option for "recursive" means that it will copy all of the files including the files inside of subfolders.
Here I copy all of the files from the folder to folder-copy.
To do this, we use the
- To remove a file, you can use the command like
Here I remove my hi.txt file.
- To remove a directory, use the command like
rm -r directory_to_remove.
I remove my folder-copy directory from my cli-practice directory i.e. current working directory.
Clear command is used to clear the terminal screen.
The Home directory is represented by
~. The Home directory refers to the base directory for the user. If we want to move to the Home directory we can use
cd ~ command. Or we can only use
Thanks for reading and stay tuned.🙂👋