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Search results for IPTABLES Explained Part 4: IPTables and Portsentry, the dynamic duo

Linux

Optimizing Desktop Performance, Part III

Post date: May 31, 2005, 14:05 Category: Optimizing Views: 4266 Comments
Tutorial quote: For desktop and laptop users who want a fast-booting operating system, getting rid of services you do not need can appear to improve performance. Obviously, if you are new to Linux, though, you probably do not know which processes you can get rid of safely nor how to stop them and keep them from restarting at boot time.
Unix+clones

Configuring Apache for Maximum Performance

Post date: February 12, 2006, 09:02 Category: Optimizing Views: 3793 Comments
Tutorial quote: Apache is an open-source HTTP server implementation. It is the most popular web server on the Internet; the December 2005 Web Server Survey conducted by Netcraft [1] shows that about 70% of the web sites on Internet are using Apache.

Apache server performance can be improved by adding additional hardware resources such as RAM, faster CPU, etc. But most of the time, the same result can be achieved by custom configuration of the server. This article looks into getting maximum performance out of Apache with the existing hardware resources, specifically on Linux systems. Of course, it is assumed that there is enough hardware resources - especially enough RAM that the server isn't swapping frequently. First two sections look into various Compile-Time and Run-Time configuration options. The Run-Time section assumes that Apache is compiled with prefork MPM. HTTP compression and caching is discussed next. Finally, using separate servers for serving static and dynamic contents is covered. Basic knowledge of compiling and configuring Apache and Linux are assumed.
Linux

Building a Linux Cluster, Part 2

Post date: April 18, 2005, 03:04 Category: Network Views: 2731 Comments
Tutorial quote: In this installment, we consider the what of cluster building: the hardware and software components that make up a Linux cluster, and some ways to think about integrating them into a solution for your environment.
Ubuntu

Kubuntu 6.10 (Edgy Eft) Step By Step Installation with Screenshots

Post date: December 21, 2006, 17:12 Category: Desktop Views: 3852 Comments
Tutorial quote: Kubuntu is a user friendly operating system based on KDE, the K Desktop Environment. With a predictable 6 month release cycle and part of the Ubuntu project, Kubuntu is the GNU/Linux distribution for everyone.
Unix+clones

Backing up your files with rsync

Post date: October 14, 2007, 15:10 Category: Network Views: 3620 Comments
Tutorial quote: Backing up files on a regular basis is an integral part of administering your server.

One way is to download each and every file when you want to save them. However, rsync makes the task a lot easier as it only downloads files that have changed - saving time and bandwidth.
Debian

Monitoring your bandwidth usage with vnstat

Post date: January 14, 2006, 20:01 Category: Network Views: 3013 Comments
Tutorial quote: There are many occasions where it is useful to have an idea of your bandwidth usage, perhaps to know when you're going to be charged more by your ISP, or perhaps just as part of general monitoring. The vnstat tool is a simple means of doing just that.
FreeBSD

Bluetooth Security Review, Part 1

Post date: April 30, 2005, 00:04 Category: Security Views: 3049 Comments
Tutorial quote: Bluetooth (BT) wireless technology provides an easy way for a wide range of devices to communicate with each other and connect to the Internet without the need for wires, cables and connectors. The technology seams to be very interesting and beneficial, yet it can also be a high threat for the privacy and security of Bluetooth users.
Unix+clones

Performance Tuning with GCC, Part 1

Post date: November 26, 2005, 01:11 Category: Optimizing Views: 3580 Comments
Tutorial quote: This article provides an overview of the different flags controlling optimization in GCC and some hints on how to use them to get the most performance out of your application. In particular, it discusses some of the new optimization features of the GCC 4.x series included in Fedora™ Core 4 and the upcoming Red Hat® Enterprise Linux® versions.
Linux

Optimizing Desktop Performance, Part I

Post date: May 16, 2005, 23:05 Category: Optimizing Views: 3660 Comments
Tutorial quote: If you have complained about the speed of OpenOffice.org or Firefox or about the amount of time Linux takes to boot up, this set of optimizations should change your perception. Linux can boot up quickly, the word processor can spring open and the browser can fly. So, let's make these adjustments so your computer can fly.
Ubuntu

Disable unnecessary services in Ubuntu - Boot-Up Manager

Post date: November 17, 2008, 11:11 Category: Optimizing Views: 8889 Comments
Tutorial quote: The startup scripts located in /etc/init.d are part of the bootup sequence of every Debian-like distro. Very often Ubuntu's documentation and guides have suggested - in order to deactivate init scripts - to change the permissions of the scripts in /etc/init.d, making them non-executable.
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