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How to Install Let’s Encrypt in CentOS / RHEL / Fedora / FreeBSD / OpenBSD / Ubuntu / Linux

Let's Encrypt is a free, automated, and open certificate authority (CA) that provides Domain Validated (DV) certificates essential [...]

By |2020-08-15T09:47:23-07:00Modified: August 15, 2020June 29th, 2016|Categories: Web Servers|Tags: , , , , , , , , , , , |2 Comments

Install Munin Tracking & Monitoring System (RedHat/CentOS/Ubuntu/SUSE)

Munin Monitoring System is one of the popular computer system, network and infrastructure monitoring tool. With Munin, real-time [...]

By |2020-08-05T17:43:38-07:00Modified: August 5, 2020April 8th, 2015|Categories: Network & System Monitoring|Tags: , , , , , , , |1 Comment

Mail: Command Not Found in Linux (RedHat / CentOS / Debian / Ubuntu)

In Linux operating system such as Red Hat Enterprise Linux (RHEL), CentOS and Ubuntu, the following error may [...]

By |2020-07-26T02:59:32-07:00Modified: July 26, 2020December 7th, 2014|Categories: Linux|Tags: , , , , , , , |5 Comments

Perl Module This Distribution Requires a Working Compiler at Makefile.PL

When compiling and installing a Perl module from source via CPAN or CPANM (CPANMinus) on Linux such as [...]

By |2020-06-15T13:42:39-07:00Modified: June 15, 2020November 11th, 2014|Categories: Linux|Tags: , , , , , , , , , , |0 Comments

How to Read User Mail in the Webmin / Virtualmin / Cloudmin

Webmin is a web-based GUI interface to manage UNIX and Linux systems. Webmin is also the base of [...]

By |2020-01-21T05:26:44-08:00Modified: January 21, 2020November 10th, 2014|Categories: Linux|Tags: , , , , , , , , , , , |0 Comments

Install & Set Up Linux Web Server with Virtualmin Control Panel

Virtualmin is an open source domain hosting and web server control panel built on top of Webmin, a [...]

By |2020-06-04T17:53:04-07:00Modified: June 4, 2020November 9th, 2014|Categories: Web Servers|Tags: , , , , , , , , , , |5 Comments

How to Get Linux Server Sends Email Alert on Root Login

To improve the security of the server, especially web server which exposes to the Internet and possible worldwide [...]

By |2021-10-11T04:08:37-07:00Modified: October 11, 2021August 11th, 2007|Categories: Linux|Tags: , , , , , , , |9 Comments
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