Linux Command To Find the System Configuration And Hardware Information

What
is the command to find the system configuration on Linux operating system using command line (text) mode?

On Linux based system most of the hardware information can be extracted from /proc file system, for example display CPU and Memory
information, enter:

Tutorial details
Difficulty	Intermediate (rss)
Root privileges	Yes
Requirements	None
Estimated completion time	10 minutes

cat /proc/meminfo

cat /proc/cpuinfo

The following list summarizes commands to get various hardware from the system:

Linux cpu/hardware information

Use any one of the following command:

#
less /proc/cpuinfo

OR

#
lscpu

Linux show free and used memory in the system

Use any one of the following command:

#
cat /proc/meminfo

OR

#
free

# free -m

# free -mt

# free -gt

Linux find out the current running kernel version

Type the following command:

#
cat /proc/version

Sample outputs:

Linux version 3.2.0-43-generic (buildd@batsu) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #68-Ubuntu SMP Wed May 15 03:33:33 UTC 2013

OR use

#
uname -mrs

# uname -a

Find out information about the Linux distribution and version

#
lsb_release -a

Sample outputs:

No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 12.04.2 LTS
Release:	12.04
Codename:	precise

OR use the following command:

$
cat /etc/*release*

Sample outputs:

Red Hat Enterprise Linux Server release 6.4 (Santiago)

List all PCI devices

#
lspci

List all USB devices

#
lsusb

List all block devices (hard disks, cdrom, and others)

#
lsblk

Dump all hardware information

Type the following command to see your motherboard, cpu, vendor, serial-numbers, RAM, disks, and other information directly from the system BIOS:

#
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