The Secure Shell (SSH) protocol by default uses port 22. Accepting this default port does not make your OS installation insecure. But changing this SSH port will do a significant variance in security. It will stop many automated attacks and in fact means a bit harder to guess which port SSH is accessible from.

Today web-GUI control panels are very popular because of easy to use interfaces even for beginners, extended functionality, stability. But what about free alternatives to CPanel, DirectAdmin, Plesk and other commercial web server panel software? Are they existing and what you may get for free?

What is a Linux server control panel? This is a type of software working on a Linux server with a web based GUI interface which has capability to manage the web services and web users. Basically, server control panels can manage users, domains, email accounts, FTP accounts, file management functions, creation of subdomains, disk space monitoring, bandwidth monitoring, create backups and many more functions.

Version control has become an indispensable tool in modern software development. Git is a system for tracking changes in computer files and collaboration with those files among multiple developers.

This tutorial will explain How to set the FQDN in CentOS 7 and RHEL 7 (Red Hat Enterprise Linux 7). The documentation explicitly instructs you to use the fully qualified domain name as the machine’s static hostname. Trying to name a server with a single unqualified name causes a variety of problems with various services, most notably email. The given below is our system information, replace these values as per your system information.

Recently we were asked by customers what is the file descriptor limit and why to setup them? If you will run a load testing on your VPS you may be noticed that it ran out of file descriptors. Let look deeply inside the problem.

LAMP is acronym refers to a Linux-based operating system (Linux + Apache + MySQL + PHP) this is a popular open source web platform stack for Linux. LAMP stack is a commonly used to run dynamic web sites and servers. The main components are GNU/Linux operating system, the Apache HTTP Server, the MySQL relational database management system, and the PHP programming language. In some different installs it includes Linux, Apache2+, MariaDB (MySQL drop-in replacement) and PHP/Python/Perl.

Linux has many services, daemons, systems, subsystems and applications running. You use system logging to gather data about your running system from the moment it boots. From time to time you have to check the health of processes, monitor the activity.

In this article we will process upgrade from CentOS 6 to CentOS 7. Operation system CentOS 7 was released right after the main Red Hat Enterprise Linux 7 release. OS includes the same long-waiting feature sets as base RHEL. One of the key features is Systemd and Docker functionality. But the most interesting feature is a possibility to perform upgrades from version 6 to version 7 automatically without the need of the installation images. This upgrade still requires a reboot but this enables upgrading procedures very convenient for servers operated remotely.

Composer is a dependency management tool for PHP similar to npm for Node.js and bundle for ruby. It is not a package manager in the same sense as Yum or Apt are. Yes, it deals with “packages” or libraries, but it manages them on a per-project basis, installing them in a directory (e.g. vendor) inside your project. By default it does not install anything globally. It does however support a “global” project for convenience via the global command. It permits you to declare the subordinate libraries your task needs and it will install them in your project for you.