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May 16, 2025
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Author: Magesh Maruthamuthu

csf-tutorials

How to block a Country using CSF Firewall

November 4, 2013February 11, 2016 - by Magesh Maruthamuthu - 1 Comment

If you are having own VPS or Dedicated server, you will be getting “N” number of hacking attempt from unauthorized country (Hackers country). The best option to secure linux server …

How to block a Country using CSF Firewall Read More
web-tutorials / wordpress-tutorials

How to Change your WordPress Username

November 4, 2013December 28, 2015 - by Magesh Maruthamuthu - Leave a Comment

Have you tried to change wordpress admin username on wordpress admin panel ? If so you will get “Usernames cannot be changed” but you don’t worry about that, i have …

How to Change your WordPress Username Read More
exim-tutorials / linux-tutorials

How to remove the messages from “exim” mail queue

October 29, 2013January 23, 2016 - by Magesh Maruthamuthu - Leave a Comment

Suddenly the Spam being sent via IMAP AUTHRELAY (600000+ mail’s in queue), i can’t able to delete from GUI, its stroked and very struggle to do it. Then i have …

How to remove the messages from “exim” mail queue Read More
MariaDB-Tutorials / MySQL-Tutorials

Three Ways To Change User’s MySQL/MariaDB Password in Linux

October 25, 2013June 10, 2019 - by Magesh Maruthamuthu - Leave a Comment

MySQL/MariaDB is an opensource database management software, which is very famous, user friendly and widely used for data storage. This will allow the user to create a database, database user, …

Three Ways To Change User’s MySQL/MariaDB Password in Linux Read More
Linux Commands

How to Check Disk Space Usage in Linux Using the df Command?

October 24, 2013July 22, 2019 - by Magesh Maruthamuthu - Leave a Comment

You need to check a current disk space usage (or enough free disk space) on your Linux system before you performing any patch update or installing a new application or …

How to Check Disk Space Usage in Linux Using the df Command? Read More
monitoring-tools / Nagios

How To Reset/Change The NagiosAdmin Password in Linux?

October 21, 2013July 16, 2019 - by Magesh Maruthamuthu - 1 Comment

Nagios is one of the best monitoring tool, that monitors entire IT infrastructure and ensure everything functioning properly. It monitors systems, applications, services, appliance (router, switch, load-balancer, etc). In the …

How To Reset/Change The NagiosAdmin Password in Linux? Read More
DNS Lookup

How To Check Reverse DNS (rDNS) Lookup In Linux?

October 18, 2013July 28, 2019 - by Magesh Maruthamuthu - Leave a Comment

rDNS stand for Reverse DNS Lookup or Reverse DNS Resolution. In general, DNS is used to determine the IP address associated with a domain name. This process is known as …

How To Check Reverse DNS (rDNS) Lookup In Linux? Read More
Linux Commands / User Management

How to Change The Root User Password in Linux?

October 15, 2013July 28, 2019 - by Magesh Maruthamuthu - Leave a Comment

As we already know root is a super user that can do anything in Linux system. It’s similar to Administrator user in Windows. root (Super User) can change any user …

How to Change The Root User Password in Linux? Read More
Linux Advanced Commands / Linux Commands

How to find recently modified files in Linux

October 11, 2013March 11, 2021 - by Magesh Maruthamuthu - Leave a Comment

If you are working on thousands of files a day and want to find a list of files that have been modified recently in a directory for certain purposes, this …

How to find recently modified files in Linux Read More
csf-tutorials / security

How to Manage ConfigServer Security and Firewall (CSF) From Linux Command Line?

October 10, 2013April 23, 2020 - by Magesh Maruthamuthu - Leave a Comment

ConfigServer Security & Firewall (csf) is one of the famous and advanced software firewall for Linux operating system. It is very famous and running on 1000000+ servers, that prevents unnecessary …

How to Manage ConfigServer Security and Firewall (CSF) From Linux Command Line? Read More

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