How to determine the linux version number?

How to determine the Linux version number? In fact, when people mention Linux, they usually refer to a Linux distribution; but strictly speaking, Linux is a kernel, and a Linux distribution is an operating system composed of the Linux kernel, GNU tools and libraries, and a collection of software. The following article will introduce you to a good way to check the Linux kernel version number and release version. I hope it will be helpful to you.

How to check the version number in Linux?

Method 1: Use the uname command to view the Linux kernel version number

The uname command displays multiple system information, including the Linux kernel architecture, name version and release.

To find out what version of Linux kernel is running on your system, you need to type the following command:

uname -srm

Output

Linux 4.9.0-8-amd64 x86_64

The above output tells us that the Linux kernel is 64-bit, and its The version is "4.9.0-8-amd64".

Method 2: Use the hostnamectl command

hostnamectl is part of systemd and can be used to query and change the system hostname. This command also displays the Linux distribution and kernel version.

hostnamectl

Output:

Static hostname: debian9.localdomain
con name: computer-vm
Chassis: vm
Machine ID: a92099e30f704d559adb18ebc12ddac4
Boot ID: 7607cbe605d44f638d6542d4c7b3878e
Virtualization: qemu
Operating System: Debian GNU/Linux 9 (stretch)
Kernel: Linux 4.9.0-8-amd64
Architecture: x86-64

The above output tells us that the Linux kernel is 64-bit and its version is "4.9.0-8-amd64"; the distribution is "Debian GNU/Linux 9 ( stretch)", the version number is 9.

Method 3: Use the lsb_release command

The lsb_release application can display LSB (Linux Standard Library) information about the Linux distribution; this lsb_release command is suitable for lsb installed -release package for all Linux distributions:

lsb_release -a

Output:

No LSB modules are available.
Distributor ID:Debian
Description:Debian GNU/Linux 9.5 (stretch)
Release:9.5
Codename:stretch

The Linux distribution and version are shown in the "Description" line. As you can see from the output above, what is installed on my system is: Debian GNU/Linux 9.5 (stretch).

Method 4: Use the cat /etc/os-release command

/etc/os-releaseThe file contains operating system identification data, Includes information about distribution. This file is part of systemd, and the Linux system running systemd should have this file.

To view the contents of the os-release file, you need to run the following cat command:

cat /etc/os-release

The output results are as follows:

PRETTY_NAME="Debian GNU/Linux 9 (stretch)"
NAME="Debian GNU/Linux"
VERSION_ID="9"
VERSION="9 (stretch)"
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

Method 5: Use cat /etc/issue command

The /etc/issue file contains the system identification text that is displayed before the login prompt. Typically, this file contains information about the Linux version:

To view the contents of the issue file, you need to run the following cat command:

cat /etc/issue

The output will look like this:

Debian GNU/Linux 9 \n \l

Related learning recommendations: linux video tutorial

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