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Linux

Splitting Apache Logs With vlogger

Post date: June 17, 2007, 22:06 Category: Software Views: 4224 Comments
Tutorial quote: Vlogger is a little tool with which you can write Apache logs broken down by virtual hosts and days. With vlogger, we need to put just one CustomLog directive into our global Apache configuration, and it will write access logs for each virtual host and day. Therefore, you do not have to split Apache's overall access log into access logs for each virtual host each day, and you do not have to configure Apache to write one access log per virtual host (which could make you run out of file descriptors very fast).
Gentoo

Apache with mpm-worker + PHP 5 + SSL + MySQL 4.1

Post date: June 5, 2005, 22:06 Category: Network Views: 6491 Comments
Tutorial quote: We can do Apache 2 with mpm-worker with PHP 5, along with SSL and MySQL 4.1. I tested my configuration with Apache 2.0.53, PHP 5.0.4, and MySQL 4.1.11.
Unix+clones

How To Set Up Database Replication In MySQL

Post date: December 14, 2005, 19:12 Category: Software Views: 4814 Comments
Tutorial quote: This tutorial describes how to set up database replication in MySQL. MySQL replication allows you to have an exact copy of a database from a master server on another server (slave), and all updates to the database on the master server are immediately replicated to the database on the slave server so that both databases are in sync. This is not a backup policy because an accidentally issued DELETE command will also be carried out on the slave; but replication can help protect against hardware failures though.

In this tutorial I will show how to replicate the database exampledb from the master with the IP address 192.168.0.100 to a slave. Both systems (master and slave) are running Debian Sarge; however, the configuration should apply to almost all distributions with little or no modification.
Linux

Back Up Linux And Windows Systems With BackupPC

Post date: January 28, 2007, 21:01 Category: System Views: 5366 Comments
Tutorial quote: This tutorial shows how you can back up Linux and Windows systems with BackupPC. BackupPC acts as a server and is installed on a Linux system, and from there it can connect to all Linux and Windows systems in your local network to back them up and restore them without interfering with the user's work on that system. On the clients minimal to no configuration is needed. BackupPC supports full and incremental backups, and it comes with a neat web frontend for the administrator and normal user so that backups and recoveries can be managed through a web browser. It should be noted, however, that BackupPC does file-based backups, not bit-wise backups like Ghost4Linux, for example, so it is not made for disk/partition imaging.
OpenSUSE

Installation/Configuration of Last.fm Scrobbler/Player for linux

Post date: April 20, 2009, 09:04 Category: Multimedia Views: 5613 Comments
Tutorial quote: Last.fm is a UK-based Internet radio and music community website, founded in 2002. It claims over 30 million active users based in more than 200 countries.

Using a music recommender system called "Audioscrobbler", Last.fm builds a detailed profile of each user's musical taste by recording details of all the songs the user listens to, either on the streamed radio stations, the user's computer or some portable music devices. This information is transferred to Last.fm's database ("scrobbled") via a plug in installed into the user's music player. The profile data is then displayed on the user's profile page. The site offers numerous social networking features and can recommend and play artists similar to the user's favorites.
Debian

Version Control For Your /etc Directory With etckeeper/Bazaar On Debian Squeeze

Post date: July 17, 2011, 18:07 Category: Miscellaneous Views: 3458 Comments
Tutorial quote: This tutorial explains how you can store the contents of your /etc directory in a version control system (VCS) with the help of etckeeper on Debian Squeeze. etckeeper hooks into Debian's package manager apt so that whenever you install/remove a package with apt, etckeeper will commit all changes to the /etc directory to your VCS; it also tracks file metadata such as permissions which is important for files such as /etc/shadow. Using etckeeper, you can go back to a previous version of /etc if an update has overwritten valuable configuration files. Not only will etckeeper track apt's changes to /etc, it will also do a daily auto-commit so that your manual changes go to VCS as well; in addition to that, you can do commits at any time manually.
Fedora

Setting Up A High-Availability Load Balancer With HAProxy/Heartbeat On Fedora 8

Post date: March 2, 2008, 12:03 Category: Installing Views: 5021 Comments
Tutorial quote: This document describes how to set up a two-node load balancer in an active/passive configuration with HAProxy and heartbeat on Fedora 8. The load balancer acts between the user and two (or more) Apache web servers that hold the same content. The load balancer passes the requests to the web servers and it also checks their health. If one of them is down, all requests will automatically be redirected to the remaining web server(s). In addition to that, the two load balancer nodes monitor each other using heartbeat. If the master fails, the slave becomes the master - users will not notice any disruption of the service. HAProxy is session-aware - you can use it with any web application that makes use of sessions like forums, shopping carts, etc.
Debian

Running Vhosts Under Separate UIDs/GIDs With Apache2 mpm-peruser On Debian Etch

Post date: August 24, 2008, 11:08 Category: Installing Views: 4254 Comments
Tutorial quote: This article explains how you can install and configure apache2-mpm-peruser on a Debian Etch server. apache2-mpm-peruser is an MPM (Multi-Processing Module) for the Apache 2 web server, very similar to apache2-mpm-itk, but faster (almost as fast as apache2-mpm-prefork). mpm-peruser allows you to run each of your vhosts under a separate UID and GID - in short, the scripts and configuration files for one vhost no longer have to be readable for all the other vhosts. It is based on metuxmpm, a working implementation of the perchild MPM. The result is a sane and secure web server environment for your users, without kludges like PHP's safe_mode.
Linux

Hardening Linux: a 10 step approach to a secure server

Post date: June 22, 2005, 10:06 Category: Security Views: 4425 Comments
Tutorial quote: The Internet has become a far more dangerous place than it was 20 years ago. Nowadays, Operating System and application security is an integral part of a server configuration and, while firewalls are very important, they are not the panacea.

This list of steps is intended as a guideline with a practical approach. We’ll try to provide a complete picture without getting into unnecesary details. This list won’t replace a good book on secure systems administration, but it will be useful as a quick guide.

Before we get started it’s worth to mention that security is not a status: it’s just a process. The correct initial setup of the server only provides a good start and helps you get half the way through. But you actually need to walk the other half of the road, by providing proper security vigilance, monitoring and updating.
Debian

Creating Simple Virtual Hosts With mod_mysql_vhost On Lighttpd (Debian Etch)

Post date: August 7, 2008, 09:08 Category: Installing Views: 3615 Comments
Tutorial quote: This guide explains how you can use mod_mysql_vhost to create simple virtual hosts on a lighttpd web server on Debian Etch. With mod_mysql_vhost, lighttpd can read the vhost configuration from a MySQL database. Currently, you can store the domain and the document root in the MySQL database which results in very simple virtual hosts. If you need more directives for your vhosts, you would have to configure them in the global section of lighttpd.conf, which means they would be valid for all vhosts. Therefore, mod_mysql_vhost is ideal if your vhosts differ only in the domain and document root.
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