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mod_cache has been around for a while, but there are some new features in it that can help you make better use of your server's resources. Although people have traditionally used the caching capabilities of mod_cache with proxied content, that isn't its only feature. You can also cache your dynamic content and serve it as rapidly as on-disk files...

PostgreSQL has a powerful user authentication and access control system, but for a newcomer, it can seem confusing and overwhelming. In this article I hope to explain how to manage user and permissions with ease...

If you have expensive computer systems running in your data center, you want to make sure they keep running smoothly. Server vendors have addressed this by adding system monitoring devices to motherboards to report on temperatures, fan speeds, and voltages.

The standard way to monitor these parameters has traditionally been with tools such as lm_sensors on systems running Linux. However, this mechanism is far from perfect. For starters, it can be incredibly difficult to configure lm_sensors correctly because of poor documentation...

To test your website before DNS propagation has completed you can edit the HOSTS file on your local computer. Your computer will use the entries in your HOSTS file before it looks up the current information in DNS. This walkthrough will explain how to edit the HOSTS file on Windows 98/Me/2000/XP/2003/Vista computers as well as on Apple Mac OS 9 and OS X machines.

Typical Unix users cringe at the thought of putting spaces in file names. Mac users, on the other hand, frequently put spaces in file names because it's natural and may read better. This means that Mac OS X Unix geeks need to make sure their shell commands (and shell scripts) work correctly when faced with spaces in file names. Below is outlined a few simple ways to properly deal with this...

SQL*Plus is a command line SQL and PL/SQL language interface and reporting tool that ships with the Oracle Database Client and Server software. It can be used interactively or driven from scripts. SQL*Plus is frequently used by DBAs and Developers to interact with the Oracle database.

Programming a UNIX® system can be fun as well as educational. With the UNIX strace tool and GDB, the GNU Project Debugger, you can really dig deep into the functionality of your system and learn a lot about the various programs that comprise it. Using both tools in concert can be a rewarding experience as you look under the hood of your UNIX machine.

What is a RAM disk? A RAM disk is a portion of RAM which is being used as if it were a disk drive. RAM disks have fixed sizes, and act like regular disk partitions. Access time is much faster for a RAM disk than for a real, physical disk. However, any data stored on a RAM disk is lost when the system is shut down or powered off. RAM disks can be a great place to store temporary data...

This website provides tutorials and sample course content so Computer Science students and educators can learn more about current computing technologies and paradigms. In particular, this content is Creative Commons licensed which makes it easy for CS educators to use in their own classes.

Very comprehensive oracle installation guide.