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Performance Tools for Optimizing Linux: Process-Specific CPU

Post date: June 1, 2005, 07:06 Category: Optimizing Views: 3129 Comments
Tutorial quote: The tools to analyze the performance of applications are varied and have existed in one form or another since the early days of UNIX. It is critical to understand how an application is interacting with the operating system, CPU, and memory system to understand its performance. This chapter will help you understand where the bottleneck in your system is occuring, and how to fix it.

ntop in openSUSE to probe & monitor Network Traffic

Post date: April 10, 2009, 07:04 Category: Network Views: 5891 Comments
Tutorial quote: ntop is a free opensource network traffic probe that shows the network usage. ntop is based on libpcap and can run on Linux/Unix and Windows operating system. ntop provides a very easy to use a web access to navigate through ntop traffic information and get a dump of the network status.

Using Software RAID-1 with FreeBSD

Post date: April 28, 2008, 17:04 Category: System Views: 5968 Comments
Tutorial quote: Have you ever needed a software RAID solution for a low-end server install? Perhaps you've wanted your workstation to take advantage of the redundancy provided by a disk mirror without investing in a hardware RAID controller. Has a prior painful configuration experience turned you off software RAID altogether on Unix systems?

Since 5.3-Release, FreeBSD comes with gmirror(8), which allows you to easily configure a software RAID 1 solution.

DarkStat - Network traffic & bandwidth monitoring in openSUSE

Post date: October 16, 2008, 21:10 Category: Network Views: 4999 Comments
Tutorial quote: DarkStat is a simple Packet Sniffing Network Traffic/Bandwidth monitoring utility for Linux and UNIX. DarkStat presents simple webinterface with nice graphs and stats auto-refreshed. Darkstat uses a very low footprint and the memory, CPU usage and is used in pfSense, redWall opensource firewalls.

Backup and Restore Linux Partitions Using Partimage

Post date: January 22, 2007, 18:01 Category: Installing Views: 2969 Comments
Tutorial quote: Partition Image is a Linux/UNIX utility which saves partitions in many formats (see below) to an image file. The image file can be compressed in the GZIP/BZIP2 formats to save disk space, and split into multiple files to be copied on removable floppies (ZIP for example), … Partitions can be saved across the network since version 0.6.0.When using Partimage, the partitions must be unmounted.

gDesklets - Desklets for your Desktop in openSUSE

Post date: August 3, 2008, 13:08 Category: Desktop Views: 5903 Comments
Tutorial quote: gDesklets is another great tool like Google Gadgets for bringing mini programs called desklets such as weather forecasts, news tickers, system information displays, or music player controls, onto your desktop, where they are sitting there in a symbiotic relationship of eye candy and usefulness. The possibilities are really endless and they are always there to serve you whenever you need them, just one key-press away. The system is not restricted to one desktop environment, but currently works on most of the modern Unix desktops (including GNOME, KDE, Xfce).

Fast and Secure FTP Server with Vsftpd in Debian

Post date: February 22, 2007, 20:02 Category: Network Views: 4234 Comments
Tutorial quote: vsftpd is a GPL licensed FTP server for UNIX systems, including Linux. It is secure and extremely fast. It is stable.Don’t take my word for it, though. Below, we will see evidence supporting all three assertions. We will also see a list of a few important sites which are happily using vsftpd. This demonstrates vsftpd is a mature and trusted solution.vsftpd is an FTP server, or daemon. The “vs” stands for Very Secure.

Optimizing Desktop Performance, Part II

Post date: May 24, 2005, 18:05 Category: Optimizing Views: 3343 Comments
Tutorial quote: As we discussed in last week's article, for most of its existence, people have distributed Linux as a workstation or a server rather than as a desktop. The default workstation that evolved has existed mostly for use by developers. So, when you install a Linux distribution with a graphical interface, it generally looks like what a developer might want. In addition, it performs similar to how many UNIX workstations work, which can seem slow.

In this article, we continue to look at the Linux desktop in a different light. Here, we think of it as a computer system with a fast interface that we can optimize for the knowledge worker and consumer.

Upgrading FreeBSD

Post date: April 1, 2006, 05:04 Category: System Views: 3520 Comments
Tutorial quote: This document started as a follow up to The Ultimate Multimedia Server Guide and how to go about keeping your server up to date and patched with the latest O/S patches and security patches. The other reason for this document was to try and create an easy to follow update guide for the not so Unix savvy users that visit my website from time to time. My first time trying to upgrade FreeBSD from sources went well but trying to understand and piece together all the other documentation was more of a daunting task than actually upgrading.

Delete Qmail Server messages Queue

Post date: January 12, 2007, 18:01 Category: Software Views: 2686 Comments
Tutorial quote: qmail is a mail transfer agent that runs on Unix. It was more secure replacement for the popular Sendmail program. The author offered a $500 prize for the first person to publish a verifiable security hole in the latest version of the software.

This is a useful thing to do in a number of situations. For instance, if you are hit with a spamming attack, you can temporarily instate a second Qmail installation (once the spam run is finished), allow it to take over mail receipt,and then use this tool to clean the offending mails out of the queue before switching over to the main Qmail installation once again.
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