20% of Linux Commands You Will Use 80% of the Time

What You Will Learn

• Set up a Linux environment using Docker and run basic Linux commands
• Navigate the Linux file system and perform file operations
• Use Linux commands to troubleshoot and resolve issues

Key Concepts

Linux commands are used to interact with the operating system and perform various tasks. The uname command is used to check the operating system environment. The pwd command is used to print the current working directory, while the cd command is used to change directories. The ls command is used to list files and directories, and the cat command is used to print the contents of a file.

Code Examples

uname

This command checks the operating system environment.

pwd

This command prints the current working directory.

cd /var/log/application

This command changes the directory to /var/log/application.

ls -l

This command lists files and directories with extended information.

cat db.conf

This command prints the contents of the db.conf file.

Lesson Summary

In this lesson, we learned how to set up a Linux environment using Docker and run basic Linux commands. We navigated the Linux file system, performed file operations, and used Linux commands to troubleshoot and resolve issues. We started by setting up a Linux environment using Docker and running the uname command to check the operating system environment. We then used the pwd command to print the current working directory and the cd command to change directories. We listed files and directories using the ls command and printed the contents of a file using the cat command. We also used the grep command to filter output and the curl command to make HTTP requests. Additionally, we used the vim editor to edit files and the chmod command to change file permissions.

Practice Exercise

Use the find command to search for a file named “database.conf” in the entire file system. Use the grep command to filter the output and search for lines containing the word “database”. Use the cat command to print the contents of the file.

What Is Next

In the next lesson, we will learn more advanced Linux commands and techniques for troubleshooting and resolving issues. We will also explore how to use Linux commands to automate tasks and improve productivity.