How to Kill Processes in Linux using - kill, pkill, killall
Process Control Using Signals A signal is a software interrupt delivered to a process. Signals report events to an executing program.
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How to Set a Password Management Policy for Users, and Manually Lock and Unlock User Accounts in CentOS/RHEL
shadow passwords and password policy At one time, encrypted passwords were stored in the world-readable /etc/passwd file. …
How to Switch User Account and Configure Sudo in Linux
The SuperUser Most operating systems have some sort of superuser, a user that has all power over the system. In Linux, …
Interpreting Displayed Load Average Values in "Uptime" Command Output
Describing Load Average Load average is a measurement provided by the Linux kernel that is a simple way to represent the …
Understanding 'Top' Command Output Fields in Linux
Real-Time Process Monitoring The top program is a dynamic view of the system’s processes, displaying a summary …
Understanding Linux Special Permissions - Sticky Bit, SUID, SGID
Special Permissions Special permissions constitute a fourth permission type in addition to the basic user, group, and …
"There Are # Physical Volumes Missing" - Error in Pvscan Even When the PVs Are Present
The Problem The output of pvscan command shows ‘There are # physical volumes missing’, but these physical …
Beginners Guide to Editing Files in Linux With VIM
A key design principle of Linux is that information and configuration settings are commonly stored in text-based files. …
Beginners Guide to User and Group Administration on a Linux System
In this post and in future posts in the series, we will learn how to create, manage, and delete local users and groups …
Beginners Guide to Using Shell Variables in Linux
Using Shell Variables The Bash shell allows you to set shell variables that you can use to help run commands or to …
How to Create Hard Links and Symbolic (Or "Soft") Links in Linux
It is possible to create multiple names that point to the same file. There are two ways to do this: by creating a hard …