Troubleshooting Guide in Linux

CPU information

- #cat /proc/cpuinfo

Memory information in the System

- #free -m

Current CPU & Memory Usage of the System

- #top

Disk usage in the system

 - #df -h

Disk installed in the system

- # fdisk -l

History of executed Command in the system

- #history

 Linux System OS & Kernel information:

- uname -a
- #cat /etc/system-release
- rpm -qa | grep -i centos-release

No. of Days the system is UP.

- #uptime

Currently logged on user in the system:

- #w
- #whoami
- #who

List of all PCI devices in the System

 - #lspci