Linux | 2DayGeek

How to Convert Text Files between Unix and DOS (Windows) Formats

August 18, 2020August 18, 2020 - by Magesh Maruthamuthu - 1 Comment

As a Linux administrator, you may have noticed some requests from developers to convert files from DOS format to Unix format, and vice versa. This is because these files were …

Howtos / Linux / Linux Administration / Linux Basic / Linux Commands

How to Kill user sessions in Linux

July 28, 2020February 17, 2021 - by Magesh Maruthamuthu - Leave a Comment

Sometimes we might need to kill a user session in Linux based on requests, which can be done by sending SIGNALS with kill command. We need to send one of …

Howtos / Linux / Linux Administration / Linux Basic / Linux Commands / User Management

How to become a ‘root user’ in Linux?

July 21, 2020January 25, 2021 - by Magesh Maruthamuthu - Leave a Comment

root user is a privileged user in Linux, which is similar to an administrator in Windows. All kind of administrative operations can be performed using root user privilege hence it …

Arch Linux / CentOS / Debian / fedora / Howtos / Linux / Linux Advanced Commands / Linux Commands / Linux Mint / Linux-Distributions / linux-tutorials / opensuse / Oracle Linux / Red Hat / Red Hat Enterprise Linux / RHEL / ubuntu

How to Mount and Unmount File System/Partition in Linux

July 7, 2020July 7, 2020 - by Magesh Maruthamuthu - Leave a Comment

Generally, a file system must be mounted on a Linux system to access the contents. When adding a new hard disk to your system, you may need to use the …

Hard Link / Howtos / Linux / Linux Commands / Soft Link / Symbolic Link

Difference between Soft link vs Hard link

May 28, 2020January 26, 2021 - by Magesh Maruthamuthu - Leave a Comment

Link is a mechanism of creating a shortcut to the original file or directory which contains information about its files or directories. What is Soft link? A symbolic link, also …

Howtos / Linux / Linux Administration / Linux Advanced Commands / Linux Commands

How to Remove files older than ‘N’ days using Tmpwatch/Tmpreaper on Linux

May 20, 2020January 11, 2021 - by Magesh Maruthamuthu - Leave a Comment

You may have missed to delete some files that are no longer needed on your computer in some directory. It could be either in “Download” or any other directory that …

FAQ / Linux / Linux Administration / Linux Basic / Linux Commands

How to execute a command or script at reboot or startup

May 13, 2020April 21, 2021 - by Magesh Maruthamuthu - 1 Comment

Well-known services in Linux can be added on boot time without any problems, because most of them come with their own script, which is done using ‘chkconfig’ and ‘systemctl’ commands. …

Arch Linux / CentOS / database / Debian / fedora / Howtos / Linux / Linux Advanced Commands / Linux Commands / Linux Mint / Linux-Distributions / linux-tutorials / MariaDB-Tutorials / MySQL-Tutorials / opensuse / Oracle Linux / Red Hat / Red Hat Enterprise Linux / RHEL / ubuntu / uptime

Three Methods to Check Uptime of MySQL/MariaDB Database Server on Linux

May 5, 2020May 5, 2020 - by Magesh Maruthamuthu - Leave a Comment

We all know the purpose of the uptime command in Linux. This is used to check the uptime of the Linux system and how long the system runs without restarting. …

Ethernet / Linux / Linux Commands / Network Interface Card / NIC / Shell Script

How to check Network Interface details in Linux

April 21, 2020March 31, 2021 - by Magesh Maruthamuthu - Leave a Comment

Server primary interface would be configured as part of the server build activity, but sometimes you may need to configure an additional network interface in Linux for several reasons. An …

Bash Script / Linux / Linux Commands / Shell Script / User Management

How to check user password expiration date in Linux

March 18, 2020June 14, 2021 - by Magesh Maruthamuthu - Leave a Comment

If you enabled a password policy on Linux, the password must be changed before it expires, otherwise you will be notified to change the password upon login until the password …