How to check OS of Linux?

Checking the Operating System of Linux

Understanding the Basics

Before we dive into the process of checking the operating system of Linux, it’s essential to understand the basics of Linux and its components. Linux is an open-source operating system that is based on Unix and is widely used in various industries, including web development, server administration, and desktop computing.

Components of Linux

To check the operating system of Linux, you need to know the components that make up the system. Here are the main components:

• Kernel: The kernel is the core of the Linux operating system, responsible for managing hardware resources and providing a platform for running applications.
• File System: The file system is the storage system that holds the data and programs on the computer. Linux uses a file system called ext4 as its default file system.
• System Libraries: System libraries are pre-written code that provides a set of functions and data structures that can be used by applications.
• User Interface: The user interface is the graphical user interface (GUI) that allows users to interact with the computer.

Checking the Operating System of Linux

To check the operating system of Linux, you can use the following methods:

• Using the uname Command: The uname command is a built-in command in Linux that displays information about the operating system, including the kernel version, file system type, and hardware information.
• Using the lsb_release Command: The lsb_release command is a built-in command in Linux that displays information about the Linux distribution, including the kernel version, distribution name, and release date.
• Using the cat /etc/os-release File: The /etc/os-release file is a configuration file that contains information about the Linux distribution, including the kernel version, distribution name, and release date.

Checking the Kernel Version

To check the kernel version of Linux, you can use the following command:

• uname -r Command: The uname -r command displays the kernel version.
• uname -a Command: The uname -a command displays detailed information about the kernel, including the kernel version, machine type, and architecture.

Checking the File System Type

To check the file system type of Linux, you can use the following command:

• lsblk Command: The lsblk command displays a list of all block devices on the system, including the file system type.
• df -h Command: The df -h command displays information about the disk usage, including the file system type and usage percentage.

Checking the Hardware Information

To check the hardware information of Linux, you can use the following command:

• lspci Command: The lspci command displays information about the system’s hardware components, including the kernel version and hardware information.
• sysfs Command: The sysfs command provides a way to access and manipulate system information, including hardware information.

Example Output

Here’s an example output of the uname -r command:

Linux 5.15.0-57-generic #58-Ubuntu SMP Tue Apr  6 12:34:56 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

This output displays the kernel version as 5.15.0-57-generic, which is the kernel version of Linux.

Here’s an example output of the lsblk command:

NAME        TYPE SIZE FSTYPE  FSAVAIL  FSB  FSSZ  FSSZM  FSSZP  FSSZQ  FSSZR  FSSZS  FSSZT

/sdev      block  0  0  0  0  0  0  0  0  0  0

/dev/sda   block  30  0  0  0  0  0  0  0  0  0

/dev/sdb   block  30  0  0  0  0  0  0  0  0  0

This output displays information about the system’s block devices, including the file system type and usage percentage.

Conclusion

Checking the operating system of Linux is an essential step in understanding the system’s components and functionality. By using the uname, lsb_release, and cat /etc/os-release commands, you can gather information about the kernel version, file system type, and hardware information. Additionally, using the lspci and sysfs commands can provide information about the system’s hardware components and system information. By following these steps, you can gain a deeper understanding of the Linux operating system and its components.

Tips and Tricks

• Use the uname -r command to check the kernel version.
• Use the lsblk command to check the file system type.
• Use the df -h command to check the disk usage.
• Use the lspci command to check the system’s hardware components.
• Use the sysfs command to access and manipulate system information.
• Use the cat /etc/os-release file to check the Linux distribution information.

Common Mistakes

• Using the uname -a command instead of uname -r to check the kernel version.
• Using the lsblk command instead of df -h to check the disk usage.
• Using the lspci command instead of sysfs to check the system’s hardware components.
• Not using the cat /etc/os-release file to check the Linux distribution information.