Someone looks at free -h, sees almost no free memory, and assumes the server is in trouble. It usually isn’t. Linux fills spare RAM with cached file data on purpose, because memory sitting empty is memory doing nothing, and it…
Continue Reading →Nagios is an open source monitoring system, and for a long stretch it was the default answer for keeping an eye on Linux infrastructure. It runs scheduled checks against hosts, services and network devices, so servers, switches and the applications…
Continue Reading →Prerequisites For this whole installation and configuration setup of WordPress, the server must have a LAMP server installed as I described in this tutorial How To Install LAMP Stack On Ubuntu 16.04 Xenial Xerus before you proceed. Now let’s begin…
Continue Reading →In this tutorial we will learn how to install Apache web server using yum command. The Apache HTTP Web Server is an open-source HTTP server for modern operating systems including UNIX and Windows. The goal of this project is to provide a secure,…
Continue Reading →Nagios Core is the open source engine behind a lot of the monitoring you have probably met without knowing it. You tell it which hosts and services matter, it checks them on a schedule, and it gets in touch when…
Continue Reading →In this tutorial, we are going to learn how to install LAMP stack on Ubuntu 16.04 server. If we explain LAMP, that would be like Linux, Apache, MySQL, and PHP. Let start with following steps. Four separate pieces of software…
Continue Reading →Postfix is a open source email server with high performance solution. There are many reasons to deploy Postfix Mail Transfer Agent on your environment. You can also setup Postfix to send email as an external SMTP provider like Google Apps…
Continue Reading →BIND (Berkely Internet Name Domain) is a popular software for translating domain names into IP addresses and usually found on Linux servers. In this how-to tutorial we are going to explain the basic concepts of DNS BIND and analyse the…
Continue Reading →You start a long database import over SSH, the wifi drops, and the import dies with the connection. Anyone who administers Linux remotely has done this at least once, and it is exactly the problem screen was built to solve….
Continue Reading →File permissions have a gap in them, and it is a big one. Root ignores them. Set a file to 000, lock it down as hard as chmod allows, and root still deletes it without so much as a warning….
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