How to Check System Info on Linux: Commands and Examples

To check system info on Linux, use commands like uname -a for kernel details, lsb_release -a for OS info, and lscpu for CPU details. These commands give quick insights about your system's hardware and software.

Syntax

Here are common commands to check system info on Linux:

• uname -a: Shows kernel name, version, and system architecture.
• lsb_release -a: Displays Linux distribution details.
• lscpu: Provides CPU architecture and details.
• free -h: Shows memory usage in human-readable format.
• df -h: Displays disk space usage.

bash

uname -a
lsb_release -a
lscpu
free -h
df -h

Example

This example runs uname -a to show kernel and system info, and lsb_release -a to show distribution details.

bash

uname -a
lsb_release -a

Output

Linux myhostname 5.15.0-60-generic #66-Ubuntu SMP Fri Jan 27 22:54:38 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 22.04.2 LTS
Release:        22.04
Codename:       jammy

Common Pitfalls

Some common mistakes when checking system info:

• Running lsb_release on systems without the lsb-release package installed will cause an error.
• Using uname without options shows limited info; use -a for full details.
• Confusing free output units; use -h for human-readable sizes.

bash

lsb_release -a
# If command not found, install with:
sudo apt-get install lsb-release

Quick Reference

Command	Purpose
uname -a	Show kernel and system architecture details
lsb_release -a	Display Linux distribution info
lscpu	Show CPU architecture and specs
free -h	Display memory usage in human-readable format
df -h	Show disk space usage in human-readable format

Key Takeaways

Use uname -a to get full kernel and system architecture info.

Run lsb_release -a to see your Linux distribution details.

Use lscpu to check CPU information quickly.

Add -h option to commands like free and df for easy-to-read output.

Install missing packages like lsb-release if commands are not found.