Common Linux commands--system info

The most important commands helping you to explore your system's information are shown in the below table.

Process control

In this article you can find useful information about handling processes in Linux/Unix systems like how to send a command in the background. Every New Systems Administrator should know how to use those commands.

About password security

Weak passwords are probably the most common source of security problems. Even at home, you may expose yourself to trouble if somebody is able to hack your computer when you browse the Internet and read your files. Here are some examples of hazardous passwords:

How to retrieve root password

Even if I never forget any passwords, I would still study this issue in detail because it can give me a hint on how my mother might be reading my ICQ chats history :-)

What is SWAP?

Swap is an extension of the physical memory of the computer. Most likely, you created a swap partition during Linux installation. You can verify the amount of swap space available on your system using:

How to display Network interface statistics

In this article it is explained how to use nestat command to show statistics of eth0,localhost,wireless or any other interface.

How to display CPUs in Linux

Simply type on shell less /etc/cpuinfo . The first lines of the output are similar to...

Does Help command exists in Linux?

Most Linux commands can be run with the "--help" option. For example, this will give you a concise help on the Linux cp (copy) command: cp --help | less

How to mount a remote MS Windows filesystem through Samba?

A remote MS Windows filesystem can be mounted onto a Linux filesystem through the Samba protocol (Samba must be installed)). Type a command like this (as root): 

How to change root or user password

If you need to change the root password or a user password read this article.

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