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Markdown is a text-to-HTML conversion tool for web writers. Markdown allows you to write using an easy-to-read, easy-to-write plain text format, then convert it to structurally valid XHTML (or HTML). Thus, “Markdown” is two things: (1) a plain text formatting syntax

Swivel is a website where people share reports of charts and numbers. Swivel is free for public data, and charges a monthly fee to people who want to use it in private.

Working with SEC- the Simple Event Correlator Jim Brown     jbrown@thrupoint.net    Copyright © 2003 by Jim Brown November 23, 2003 SEC is a powerful event correlation engine written entirely in Perl that is capable of handling a wide variety of event correlation tasks. This article presents a range of examples, from simple to complex, using SEC for event correlation tasks.

There are a number of times in which you find yourself needing performance data. These can include benchmarking, monitoring a system's general heath or trying to determine what your system was doing at some time in the past. Sometimes you just want to know what the system is doing right now. Depending on what you're doing, you often end up using different tools, each designed to for that specific situation. Unlike most monitoring tools that either focus on a small set of statistics, format their output in only one way, run either interatively or as a daemon but not both, collectl tries to do it all. You can choose to monitor any of a broad set of subsystems which currently include buddyinfo, cpu, disk, inodes, infiniband, lustre, memory, network, nfs, processes, quadrics, slabs, sockets and tcp.

If you've never abandoned your 4th grade obsession with the night sky (and who has?), Star Viewer is a web-based tool for peeking at some of the most interesting and vivid sights in the night sky. Star Viewer is not as complicated as, say, the previously mentioned open-source and feature-rich astronomy tool Stellarium

Given a directory on a drive, and a minimum and maximum file size, this program will graph the frequency with which files within that size range appear in that directory (and all subdirectories). See screenshot.

Need to monitor Linux server performance? Try these built-in command and a few add-on tools. Most Linux distributions are equipped with tons of monitoring. These tools provide metrics which can be used to get information about system activities. You can use these tools to find the possible causes of a performance problem. The commands discussed below are some of the most basic commands when it comes to system analysis and debugging server issues such as: Finding out bottlenecks. Disk (storage) bottlenecks. CPU and memory bottlenecks. Network bottlenecks.

"Last week, I told you about my NAS purchase, and my desire to explore desktop applications for backing up your Ubuntu computer. From the administrative interface of my Buffalo NAS, I created a network share that I could access with the different systems in my office. It's an SMB share so that it can also be accessed from Windows if needs arise. I then permanently mount those shares as network file systems (though not NFS) on my Kubuntu Karmic system. This I do from the command line

In general terms, DeltaCopy is an open source, fast incremental backup program. Let's say you have to backup one file that is 500 MB every night. A normal file copy would copy the entire file even if a few bytes have changed. DeltaCopy, on the other hand, would only copy the part of file that has actually been modified. This reduces the data transfer to just a small fraction of 500 MB saving time and network bandwidth. In technical terms, DeltaCopy is a "Windows Friendly" wrapper around the Rsync program, currently maintained by Wayne Davison. "rsync" is primarily designed for Unix/Linux/BSD systems. Although ports are available for Windows, they typically require downloading Cygwin libraries and manual configuration.

How can I restore those *-ptcl-img.* images into a file manually ? Say if your image is /home/partimag/YOURIMAGE/, and the image is /home/partimag/YOURIMAGE/hda2.ntfs-ptcl-img.gz.aa, hda2.ntfs-ptcl-img.gz.ab..., and you want to restore the image to a file hda2.img which you can mount later. Before you do it, make sure the disk space is big enough for you to store this image file "hda2.img". Now you can run: "file /home/partimag/YOURIMAGE/hda2.ntfs-ptcl-img.gz.aa" to see it's gzip, bzip or lzop image. Say it's gzip, then you can run 1. cd /home/partimag/YOURIMAGE/ 2. touch hda2.img 3. cat dir/hda2.ntfs-ptcl-img.gz.* |gzip -d -c | partclone.restore -C -s - -o hda2.img (For partclone newer than version 0.1.1-3, partclone.restore was improved so that you do not have to touch hda2.img first)

socat is a relay for bidirectional data transfer between two independent datachannels. Each of these data channels may be a file, pipe, device (serial lineetc. or a pseudo terminal), a socket (UNIX, IP4, IP6 - raw, UDP, TCP), anSSL socket, proxy CONNECT connection, a file descriptor (stdin etc.), the GNUline editor (readline), a program, or a combination of two of these. These modes include generation of "listening" sockets, named pipes, and pseudoterminals.