How to Auto Execute Commands/Scripts During Reboot or Startup
I am always fascinated by the things going on behind the scenes when I boot a Linux system and log on. By pressing the power button on a bare metal or starting a virtual machine,…
How to Check Remote Ports are Reachable Using ‘nc’ Command
A port is a logical entity which acts as a endpoint of communication associated with an application or process on an Linux operating system. It is useful to know which ports are open and running…
How to Configure Custom SSH Connections to Simplify Remote Access
SSH (SSH client) is a program for remotely accessing a machine, it enables a user to execute commands on a remote host. It is one of the most recommended method for logging in to a…
How to Create a Shared Directory for All Users in Linux
As a system administrator, you may have a certain directory that you want to give read/write access to every user on a Linux server. In this guide, we will review how to enable write access…
How To Assign Output of a Linux Command to a Variable
When you run a command, it produces some kind of output: either the result of a program is suppose to produce or status/error messages of the program execution details. Sometimes, you may want to store…
How to Keep ‘sudo’ Password Timeout Session Longer in Linux
In recent articles, we’ve showed you 10 Useful Sudoers Configurations in Linux and Let Sudo Insult You When You Enter Incorrect Password, and in this article, we discovered a another sudo tip that will help…
How to Find Number of Files in a Directory and Subdirectories
In this guide, we will cover how to display the total number of files in the current working directory or any other directory and its subdirectories on a Linux system. We will use the find…
Set Date and Time for Each Command You Execute in Bash History
By default, all commands executed by Bash on the command line are stored in history buffer or recorded in a file called ~/.bash_history. This means that a system administrator can view a list of commands…
Learn The Basics of How Linux I/O (Input/Output) Redirection Works
One of the most important and interesting topics under Linux administration is I/O redirection. This feature of the command line enables you to redirect the input and/or output of commands from and/or to files, or…
Let Sudo Insult You When You Enter Incorrect Password
Sudoers is the default sudo security policy plugin in Linux, however, experienced system administrators can specify a custom security policy as well as input and output logging plugins. It is driven by the /etc/sudoers file…
10 Useful Sudoers Configurations for Setting ‘sudo’ in Linux
In Linux and other Unix-like operating systems, only the root user can run all commands and perform certain critical operations on the system such as install and update, remove packages, create users and groups, modify…
12 Useful Commands For Filtering Text for Effective File Operations in Linux
In this article, we will review a number of command line tools that act as filters in Linux. A filter is a program that reads standard input, performs an operation upon it and writes the…
5 Ways to Find a ‘Binary Command’ Description and Location on File System
With the thousands of commands/programs available in Linux systems, knowing the type and purpose of a given command as well as its location (absolute path) on the system can be a little challenge for newbies….
How to Customize Bash Colors and Content in Linux Terminal Prompt
Today, Bash is the default shell in most (if not all) modern Linux distributions. However, you may have noticed that the text color in the terminal and the prompt content can be different from one…
10 Interesting Linux Command Line Tricks and Tips Worth Knowing
I passionately enjoy working with commands as they offer more control over a Linux system than GUIs (Graphical User Interfaces) applications, therefore am always on the lookout to discover or figure out interesting ways and…