This blog I am going to show some popular linux commands that I often use for monitoring system.

To know your hardware info

• To know all hardware together

lshw

This will show all hardware info in long list. You may expect al list info in cli like this

• You can get this same info in short form

lshw -short

And this you can expect in cli

• You can save this info in a HTML file using this command.

sudo lshw -html > lshw.html

LSHW is an extension of LS commands with HW for hardware. It also has other extensions where you can see specific hardware group like pci devices.

• To know about PCI devices

lspci

it will look like

And you can use these options

• Produce machine-readable outputlspci -mm

• Verbose output lspci -v

• Show both textual and numeric ID’s lspci -nn

• You may also use one of the oldest linux command to know this info.

sudo dmesg

This will show you very details like this

• Human-readable of dmesg sudo dmesg -H

Storage Info :

• This will show all drive

lsblk

• To know IDs of all volumes

blkid

• Showing all devices lsblk -a

• To know each device info individually

sudo fdisk -l

CPU Info

• To know CPU info

lscpu

This will show info like this

• If you want to know only current cpu running speed

lscpu | grep MHz

Memory Info

To know how much RAM/momory free in the system you can use free command. It has multiple options

• Show in megabyte free -m
• Show in gigabyte free -g
• Show in kilobyte free -k
• Show (default kilobyte) free
• Show in human-readable form free -h

USB Info

• To know USB device info lsusb. This will be shown like this

• To know this info in verbose lsusb -v

Kernel Info

To know linux kernel info details, uname is very good command.

• To know kernel name use uname
• To know kernel release version info uname -r
• To know all info related to kernel uname -a
• To know kernel version info uname -v
• To know node name uname -n
• To know machine name uname -m
• To know OS name uname -o

Process Monitor

• To know currently running processes , use top. This will show like

• To Manage process, we can use ps commands . PS reports a snapshot of the current processes.

simple ps will show

• To see every process on the system using standard syntax ps -ef
• To get info about threads ps -eLf
• To find a process with any name, for example Java, we can use this command ps -ef | grep java

• To see every process running as root (real & effective ID) in user format: ps -U root -u root u
• If you want to kill any process , you can use kill command .

For example, a process with PIC 1000, you can kill this process by kill -9 1000

… This is a continuous post, I will add more later. Happy reading :)