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Server Monitoring With munin And monit On Debian Lenny

Post date: February 28, 2010, 13:02 Category: Miscellaneous Views: 3780 Comments
Tutorial quote: In this article I will describe how you can monitor your Debian Lenny server with munin and monit. munin produces nifty little graphics about nearly every aspect of your server (load average, memory usage, CPU usage, MySQL throughput, eth0 traffic, etc.) without much configuration, whereas monit checks the availability of services like Apache, MySQL, Postfix and takes the appropriate action such as a restart if it finds a service is not behaving as expected. The combination of the two gives you full monitoring: graphics that lets you recognize current or upcoming problems (like "We need a bigger server soon, our load average is increasing rapidly."), and a watchdog that ensures the availability of the monitored services.
Debian

Virtualization With VirtualBox 3.1.x On A Headless Debian Lenny Server

Post date: February 23, 2010, 13:02 Category: Installing Views: 3339 Comments
Tutorial quote: This guide explains how you can run virtual machines with Sun xVM VirtualBox 3.1.x on a headless Debian Lenny server. Normally you use the VirtualBox GUI to manage your virtual machines, but a server does not have a desktop environment. Fortunately, VirtualBox comes with a tool called VBoxHeadless that allows you to connect to the virtual machines over a remote desktop connection, so there's no need for the VirtualBox GUI.
Debian

Building Kernel Modules With Module-Assistant On Debian Lenny

Post date: January 26, 2010, 12:01 Category: Miscellaneous Views: 3235 Comments
Tutorial quote: module-assistant is a tool for building Debian kernel modules from source, without having to rebuild the whole kernel. It fetches module-source packages that have been prepared for the Debian distribution via apt and produces .deb packages. This tutorial shows how to use module-assistant in command-line mode and in interactive mode.
Debian

How To Set Up A USB-Over-IP Server And Client With Debian Lenny

Post date: January 24, 2010, 01:01 Category: Installing Views: 3657 Comments
Tutorial quote: This tutorial shows how to set up a USB-over-IP server with Debian Lenny as well as a USB-over-IP client (also running Debian Lenny). The USB/IP Project aims to develop a general USB device sharing system over IP network. To share USB devices between computers with their full functionality, USB/IP encapsulates "USB I/O messages" into TCP/IP payloads and transmits them between computers. USB-over-IP can be useful for virtual machines, for example, that don't have access to the host system's hardware - USB-over-IP allows virtual machines to use remote USB devices.
Debian

How To Set Up An SSL Vhost Under Apache2 On Ubuntu 9.10/Debian Lenny

Post date: January 21, 2010, 13:01 Category: Miscellaneous Views: 3511 Comments
Tutorial quote: This article explains how you can set up an SSL vhost under Apache2 on Ubuntu 9.10 and Debian Lenny so that you can access the vhost over HTTPS (port 443). SSL is short for Secure Sockets Layer and is a cryptographic protocol that provides security for communications over networks by encrypting segments of network connections at the transport layer end-to-end. We use the mod_ssl Apache module here to provide strong cryptography for Apache2 via SSL by the help of the Open Source SSL toolkit OpenSSL.
Debian

How To Enable Networking In Xen Guests On Hetzner's New EQ Servers (Debian Lenny)

Post date: October 27, 2009, 23:10 Category: Network Views: 5289 Comments
Tutorial quote: This tutorial shows how you can enable networking in Xen guests (domU) on Hetzner's new EQ servers. With the new EQ servers, you can get up to three additional IPs that are in the same subnet as the server's main IP. The problem is that these additional IPs are bound to the MAC address of the host system (dom0) - Hetzner's routers will dump IP packets if they come from an unknown MAC address. This means we cannot use Xen's bridged mode, but must switch to Xen's routed mode where the host system (dom0) acts as the gateway for the guests.
Debian

Installing Cherokee With PHP5 And MySQL Support On Debian Lenny

Post date: September 22, 2009, 11:09 Category: Installing Views: 2676 Comments
Tutorial quote: Cherokee is a very fast, flexible and easy to configure Web Server. It supports the widespread technologies nowadays: FastCGI, SCGI, PHP, CGI, TLS and SSL encrypted connections, virtual hosts, authentication, on the fly encoding, load balancing, Apache compatible log files, and much more. This tutorial shows how you can install Cherokee on a Debian Lenny server with PHP5 support (through FastCGI) and MySQL support.
Debian

How To Limit CPU Usage Of A Process With cpulimit (Debian/Ubuntu)

Post date: September 14, 2009, 09:09 Category: Miscellaneous Views: 3362 Comments
Tutorial quote: This tutorial shows how you can limit the CPU usage of a process with the tool cpulimit on Debian/Ubuntu. cpulimit is a simple program that attempts to limit the CPU usage of a process (expressed in percentage, not in cpu time). This is useful to control batch jobs, when you don't want them to eat too much CPU. It does not act on the nice value or other scheduling priority stuff, but on the real CPU usage. Also, it is able to adapt itself to the overall system load, dynamically and quickly.
Debian

How To Set Up Software RAID1 On A Running System (Debian Lenny)

Post date: August 30, 2009, 16:08 Category: Installing Views: 2966 Comments
Tutorial quote: This guide explains how to set up software RAID1 on an already running Debian Lenny system. The GRUB bootloader will be configured in such a way that the system will still be able to boot if one of the hard drives fails (no matter which one).
Debian

Virtual Hosting With PureFTPd And MySQL On Debian Lenny

Post date: August 11, 2009, 11:08 Category: Installing Views: 2326 Comments
Tutorial quote: This document describes how to install a PureFTPd server that uses virtual users from a MySQL database instead of real system users. This is much more performant and allows to have thousands of ftp users on a single machine. In addition to that I will show the use of quota and upload/download bandwidth limits with this setup. Passwords will be stored encrypted as MD5 strings in the database.
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