FAQ | 2DayGeek

How to add additional IP (Secondary IP) in Ubuntu

May 29, 2018May 12, 2021 - by Prakash Subramanian - 2 Comments.

Adding an additional or secondary IP is routine task for Linux system administrator. When we setup a new server, ideally it will have an IP address, which is the server …

FAQ / Linux Administration / Linux Commands

How to count Files and Directories in Linux

December 12, 2017May 3, 2021 - by Magesh Maruthamuthu - Leave a Comment

Hey folks, here we have a set of tricky commands that will help you to count the number of files and directories in a directory on Linux. If you run …

FAQ / Linux Administration / Linux Basic / Linux Network Command / Linux Network Tool

How to find your Linux system Private IP address

July 24, 2017June 1, 2021 - by Magesh Maruthamuthu - 3 Comments.

IP address stands for ‘Internet Protocol’ address and each devices are assigned with a specific IP address to identify the device which are connected to the network. IP Addresses can …

FAQ / Linux Administration / Linux Basic / Linux Commands

How to find the size of a directory in Linux

June 26, 2017July 29, 2021 - by Magesh Maruthamuthu

It is very easy to check the size of directories and files in Linux using the GUI, but it is not always easy to get the size of a directory …

FAQ / Linux Administration / Linux Commands / ssh-tutorials

How to Kill Inactive or Idle SSH sessions in Linux

June 21, 2017July 6, 2021 - by Magesh Maruthamuthu - 2 Comments.

Suppose you are working on a remote Linux system via ssh, and for some reason your session is disconnected, let’s say due to internet connectivity or a power outage, or …

FAQ / Howtos / Linux / Linux Administration / Linux Commands / Linux Swap Space

2 Ways to create or extend Swap space in Linux

June 12, 2017November 24, 2021 - by 2daygeek - 4 Comments.

Users can create a swap space during the installation of any Linux operating system, which is essential. If you forgot to do it, or would like to do it later, …

FAQ / Linux Administration / Linux Basic / Linux Commands

How to see users currently logged in to Linux

June 1, 2017July 12, 2021 - by Magesh Maruthamuthu - Leave a Comment

Linux is a multi-user operating system that allows multiple users to access the system at the same time. As a Linux system administrator, you have to check who are logged …

CentOS / FAQ / fedora / Linux Administration / Package Management / Red Hat

What is the difference between DNF and YUM?

June 21, 2015April 22, 2021 - by Magesh Maruthamuthu - 5 Comments.

Yum Package Manager has been replaced by DNF Package Manager since many long-standing issues in Yum remain unresolved. These problems include poor performance, excessive memory usage, slowdown for dependency resolution. …

FAQ / Linux Administration / Linux Commands / Package Management

How to find out if a package is installed in Linux?

December 19, 2013April 15, 2021 - by Magesh Maruthamuthu - Leave a Comment

A Linux package is a software package that contains lot of files and information about those files. Every software on Linux is installed using packages. Package installation on Linux sometimes …