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How to limit CPU usage with CPULimit on Ubuntu Linux

How to limit CPU usage with CPULimit on Ubuntu Linux

This document describes how to limit CPU usage in Ubuntu 14.04. I will use CPU-limit utilty for this purpose. Cpulimit is a tool which limits the CPU usage of a process (expressed in percentage, not in CPU time). It is useful to control batch jobs, when you don't want them to eat too many CPU cycles. The goal of cpulimit is to prevent a process from running for more than a specified time ratio. It does not change the nice value or other scheduling priority settings, but the real CPU usage. Also, it is able to adapt itself to the overall system load, dynamically and quickly.
The control of the used CPU amount is done sending SIGSTOP and SIGCONT POSIX signals to processes.
All the children processes and threads of the specified process will share the same percentage of CPU.

How to install TYPO3 CMS on Ubuntu 14.04

How to install TYPO3 CMS on Ubuntu 14.04

This document describes how to how you can install and run a TYPO3 (version 6.2 LTS) on Ubuntu 14.04 system. The version TYPO3 6.6LTS is the latest version and have its support till March,2017. The TYPO3 Universe offers highly flexible, scaleable and customizable products for Web Content Management, providing the basis for websites, intranets and web & mobile applications worldwide - always with a focus on the current needs of businesses and public institutions.

How To Build PHP 5.6 (PHP-FPM & FastCGI) with Zend OPcache And APCu For ISPConfig 3 On Debian 7 (Wheezy)

How To Build PHP 5.6 (PHP-FPM & FastCGI) with Zend OPcache And APCu For ISPConfig 3 On Debian 7 (Wheezy)

ISPConfig 3 has a builtin feature to support multiple PHP versions on one server and select the optimal PHP version for a website. This feature works with PHP-FPM and FastCGI. This tutorial shows how to build PHP 5.6 as a PHP-FPM and a FastCGI version on a Debian Wheezy server. These PHP 5.5 builds include Zend OPcache, and APCu.

How To Install Tomcat On CentOS 7

How to install Tomcat on CentOS 7

This document describes how to install Tomcat in CentOS 7.0. Apache Tomcat (or simply Tomcat, formerly also Jakarta Tomcat) is an open source web server and servlet container developed by the Apache Software Foundation (ASF). Tomcat implements the Java Servlet and the JavaServer Pages (JSP) specifications from Sun Microsystems, and provides a "pure Java" HTTP web server environment for Java code to run in. Apache Tomcat powers numerous large-scale, mission-critical web applications across a diverse range of industries and organizations. Some of these users and their stories are listed on the PoweredBy wiki page.

How to whitelist an IP in Fail2ban on Debian Wheezy

How to whitelist an IP in Fail2ban on Debian Wheezy

Fail2Ban is used to protect servers against brute force attacks. Fail2ban uses iptables to block attackers, so, if we want to add permanent IP address and never be blocked, we must add it in the config file.

How To Recover Data From An Encrypted Harddisk On Boot Failure With Ubuntu 14.04

How to recover data from an encrypted harddisk on boot failure with Ubuntu 14.04

This document describes how to recover an encrypted harddisk in a failed boot device for Ubuntu 14.04 Server. This method will work for Ubuntu Desktop also. This is a very havoc situation when the distro fails to boot and we have our important data inside the distro. If the harddisk is not encrypted then we can easily retrieve our data with the help of live-cds or live-USB boot devices, but if the harddisk was encrypted then situation becomes little hectic. I will cover the topic for encrypted harddisk data retrieval from Ubuntu distros.

How To Install Contao CMS On Ubuntu 14.04

How To Install Contao CMS On Ubuntu 14.04

This document describes how to how you can install and run a Contao in Ubuntu 14.04. Contao is a highly flexible and scalable open source Content Management System (CMS) that works for websites of varying capacities. It is a top notch system that ensures implementation of ace accessibility and security, and high SEO standards. Contao remains a modular model and enables usage of loads of additional extensions for enhanced website functionality. Built using contemporary PHP object-oriented programming and the MooTools JavaScript framework, Contao promises a highly intuitive user interface thanks to the use of Ajax.

How To Install PIWIK On Ubuntu 14.04

How To Install PIWIK On Ubuntu 14.04

This document describes how to install and run a PIWIK in Ubuntu 14.04. PIWIK is a downloadable, Free (GPL licensed) web analytics software platform. It provides detailed reports on your website and its visitors, including the search engines and keywords they used, the language they speak, which pages they like, the files they download and so much more. PIWIK aims to be an open source alternative to Google Analytics. PIWIK is PHP MySQL software which you download and install on your own webserver. At the end of the 5-minute installation process you will be given a JavaScript tag. Simply copy and paste this tag on websites you wish to track (or use an existing plugin to do it automatically for you).

How To Quickly Get A List Of All Applications Installed On Your UNIX/Linux Machines

How to quickly get list of all applications installed on your UNIX/Linux machines

In this tutorial I'll try to present how to quickly get the list of all applications installed on UNIX/Linux hosts. The procedure applies to the most popular UNIX/Linux distributions but is also applicable to windows hosts and some other hardware (e.g. firmware version on routers etc.). The procedure could help you track your software inventory and get notifications whenever users install/uninstall applications on their machines.

How To Install ownCloud 7 Server and Client on OpenSuse 13.1

How To Install ownCloud 7 Server and Client on OpenSuse 13.1

This document describes how to install and configure ownCloud 7 on OpenSuse 13.1. I will also connect to the ownCloud Server's data with OpenSuse 13.1 Desktop, Ubuntu 14.04 desktop and windows 7 machine. ownCloud provides access to your data through a web interface or WebDAV while providing a platform to easily view, sync and share across devices—all under your control. ownCloud’s open architecture is extensible via a simple but powerful API for applications and plugins and works with any storage.

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