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Unix+clones

Considerations for the system architect: Performance

Post date: April 20, 2005, 10:04 Category: Miscellaneous Views: 2886 Comments
Tutorial quote: For many developers and engineers, performance is often an afterthought. But when a product functions as designed and has proven stability and the right feature mix, success in the marketplace often depends upon performance. Architectural decisions define the ultimate feasible performance of any product. In this article, learn how performance-monitoring technology initially developed for mainframes can help you improve your own code's performance.
Debian

Monitoring your hardware's temperature

Post date: January 5, 2006, 09:01 Category: Software Views: 2732 Comments
Tutorial quote: Sometimes it is useful to know the temperature of your hardware, to prevent it from frying. This information can easily be found, if your hardware provides the sensors needed, and we have the necessary software.

Most computers come with temperature sensors, which can be used to prevent your hardware from excessive heat. The most important thing to watch is, of course, your CPU temperature. This is where lm-sensors comes in.
Linux

Hardening Linux: a 10 step approach to a secure server

Post date: June 22, 2005, 10:06 Category: Security Views: 3525 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

Postfix Monitoring With Mailgraph And pflogsumm

Post date: July 16, 2006, 16:07 Category: Miscellaneous Views: 3767 Comments
Tutorial quote: This article describes how you can monitor your Postfix mailserver with the tools Mailgraph and pflogsumm. Mailgraph creates daily, weekly, monthly, and yearly graphs of sent, received, bounced, and rejected emails and also of spam and viruses, if SpamAssassin and ClamAV are integrated into Postfix. These graphs can be accessed with a browser, whereas pflogsumm ("Postfix Log Entry Summarizer") can be used to send reports of Postfix activity per email.
Debian

Postfix Monitoring With Mailgraph And pflogsumm On Debian Lenny

Post date: June 15, 2010, 11:06 Category: Miscellaneous Views: 2671 Comments
Tutorial quote: This article describes how you can monitor your Postfix mailserver with the tools Mailgraph and pflogsumm. Mailgraph creates daily, weekly, monthly, and yearly graphs of sent, received, bounced, and rejected emails and also of spam and viruses, if SpamAssassin and ClamAV are integrated into Postfix (e.g. using amavisd-new). These graphs can be accessed with a browser, whereas pflogsumm ("Postfix Log Entry Summarizer") can be used to send reports of Postfix activity per email.
Debian

Postfix Monitoring With Mailgraph And pflogsumm On Debian Etch

Post date: June 26, 2007, 23:06 Category: Miscellaneous Views: 3762 Comments
Tutorial quote: This article describes how you can monitor your Postfix mailserver with the tools Mailgraph and pflogsumm. Mailgraph creates daily, weekly, monthly, and yearly graphs of sent, received, bounced, and rejected emails and also of spam and viruses, if SpamAssassin and ClamAV are integrated into Postfix (e.g. using amavisd-new). These graphs can be accessed with a browser, whereas pflogsumm (Postfix Log Entry Summarizer) can be used to send reports of Postfix activity per email.
Ubuntu

Monitoring Network Latency With Smokeping (Ubuntu 9.04)

Post date: July 16, 2009, 11:07 Category: Installing Views: 7611 Comments
Tutorial quote: This guide shows how to install and configure Smokeping on Ubuntu 9.04 to monitor network latency. SmokePing is a deluxe latency measurement tool. It can measure, store and display latency, latency distribution and packet loss. SmokePing uses RRDtool to maintain a longterm data-store and to draw pretty graphs, giving up to the minute information on the state of each network connection.
Linux

VMware and Xen Management with BixData

Post date: November 16, 2006, 20:11 Category: System Views: 3415 Comments
Tutorial quote: BixData is a system, application, and network monitoring tool which allows you to easily monitor nearly every aspect of your servers. The newly released version 2.6 is the only application that has the ability to control both Xen and VMware virtual machines. You can control both VM Hosts (the computer that's running the VM software) and VM Guests (the virtual machines running on the hosts).
Debian

Monitoring Network Latency With Smokeping (Debian Etch)

Post date: September 15, 2007, 00:09 Category: Network Views: 5960 Comments
Tutorial quote: This guide shows how to install and configure Smokeping on Debian Etch to monitor network latency. From the Smokeping web site: "SmokePing is a deluxe latency measurement tool. It can measure, store and display latency, latency distribution and packet loss. SmokePing uses RRDtool to maintain a longterm data-store and to draw pretty graphs, giving up to the minute information on the state of each network connection."
Debian

Nagios and Oreon (Nagios web front end) installation and Configuration

Post date: July 18, 2006, 17:07 Category: Software Views: 3328 Comments
Tutorial quote: Nagios is a host and service monitor designed to inform you of network problems before your clients, end-users or managers do. It has been designed to run under the Linux operating system, but works fine under most *NIX variants as well. The monitoring daemon runs intermittent checks on hosts and services you specify using external "plugins" which return status information to Nagios. When problems are encountered, the daemon can send notifications out to administrative contacts in a variety of different ways (email, instant message, SMS, etc.).

Web-based applications and online marketing solutions - LumoLink