Numeric permission mode (755, 644) in Linux CLI - Mini Project: Build & Apply

Understanding Numeric Permission Modes (755, 644) in Linux

📖 Scenario: You are managing files on a Linux server. You need to set correct permissions so that files and folders are secure but accessible as needed.Numeric permission modes like 755 and 644 are common ways to set these permissions quickly.

🎯 Goal: Learn how to create files and directories, then set their permissions using numeric modes 755 and 644.You will practice creating a directory and a file, then apply these numeric permissions and check the results.

📋 What You'll Learn

Create a directory named project

Create a file named readme.txt inside the project directory

Set the directory permission to numeric mode 755

Set the file permission to numeric mode 644

Use ls -l to display the permissions and verify

💡 Why This Matters

🌍 Real World

Setting correct file and directory permissions is essential for security and proper access control on Linux servers and systems.

💼 Career

System administrators, DevOps engineers, and developers often need to manage permissions to protect data and ensure applications run correctly.

1

Create the directory project

Type the command to create a directory named project in your current folder.

Linux CLI

# Your code here

Need a hint?

Use the mkdir command followed by the directory name.

2

Create the file readme.txt inside project

Type the command to create an empty file named readme.txt inside the project directory.

Linux CLI

mkdir project
# Your code here

Need a hint?

Use the touch command with the path project/readme.txt.

3

Set the directory permission to numeric mode 755

Type the command to set the permission of the project directory to numeric mode 755.

Linux CLI

mkdir project
touch project/readme.txt
# Your code here

Need a hint?

Use the chmod command with 755 and the directory name.

4

Set the file permission to numeric mode 644 and verify

Type the commands to set the permission of the file project/readme.txt to numeric mode 644 and then list the details of the project directory using ls -l project to verify the permissions.

Linux CLI

mkdir project
touch project/readme.txt
chmod 755 project
# Your code here

Need a hint?

Use chmod 644 project/readme.txt to set file permission.

Then use ls -l project to see the permissions.