The Linux command top is a powerful tool used to monitor and manage processes running on a Linux system. It provides a real-time view of the system’s resource utilization and can be used to identify and troubleshoot performance issues. It can also be used to monitor the performance of individual processes and to identify the processes that are consuming the most system resources. The top command is a versatile tool that can be used to monitor system performance, identify resource hogs, and troubleshoot performance issues.
1. ls: Lists the contents of a directory.
Example: ls -l
2. cd: Changes the current working directory.
Example: cd /home/user/Documents
3. mv: Moves or renames a file or directory.
Example: mv file1.txt file2.txt
4. cp: Copies a file or directory.
Example: cp file1.txt file2.txt
5. rm: Removes a file or directory.
Example: rm file1.txt
6. mkdir: Creates a new directory.
Example: mkdir my_directory
7. chmod: Changes the permissions of a file or directory.
Example: chmod 755 file1.txt
8. grep: Searches for a string of text in a file or output.
Example: grep “text” file1.txt
9. find: Searches for files in a directory hierarchy.
Example: find / -name “file1.txt”
10. cat: Displays the contents of a file.
Example: cat file1.txt
Linux Command Line Basics
The Linux command line is a text-based interface that allows users to interact with the operating system. It is a powerful tool that can be used to perform a variety of tasks, from basic system administration to complex programming. In this article, we will cover the basics of the Linux command line and how to use it.
Navigating the Command Line
The first step to using the command line is to open a terminal window. This can be done by pressing the “Ctrl + Alt + T” keys on your keyboard. Once the terminal window is open, you will be presented with a prompt. This prompt will usually look something like “[email protected]:~$”. This is where you will enter your commands.
To navigate the file system, you will need to use the “cd” command. This command stands for “change directory” and it allows you to move around the file system. To move to a different directory, you will need to type “cd” followed by the path to the directory you want to move to. For example, if you wanted to move to the “Documents” directory, you would type “cd Documents”.
Listing Files and Directories
Once you have navigated to the directory you want to work in, you can use the “ls” command to list the contents of the directory. This command will list all the files and directories in the current directory. You can also use the “ls -l” command to list the contents in a long format, which will show you more information about each file and directory.
Creating and Deleting Files and Directories
The command line also allows you to create and delete files and directories. To create a file, you can use the “touch” command followed by the name of the file you want to create. To delete a file, you can use the “rm” command followed by the name of the file you want to delete. To create a directory, you can use the “mkdir” command followed by the name of the directory you want to create. To delete a directory, you can use the “rmdir” command followed by the name of the directory you want to delete.
The Linux command line is a powerful tool that can be used to perform a variety of tasks. By understanding the basics of the command line, you can begin to explore the many possibilities it offers. With a little practice, you will soon be able to use the command line to perform complex tasks with ease.