SystemImager is software which automates Linux installs, software distribution, and production deployment. SystemImager makes it easy to do automated installs (clones), software distribution, content or data distribution, configuration changes, and operating system updates to your network of Linux machines. You can even update from one Linux release version to another! It can also be used to ensure safe production deployments. By saving your current production image before updating to your new production image, you have a highly reliable contingency mechanism. If the new production enviroment is found to be flawed, simply roll-back to the last production image with a simple update command! Some typical environments include: Internet server farms, database server farms, high performance clusters, computer labs, and corporate desktop environments.
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
The Nikon system of digital single-lens reflex (SLR) bodies and lenses is a popular choice among serious photographers worldwide. This page makes it easy to shop for Nikon digital bodies and Nikkor lenses. Every component manufactured by Nikon is covered, plus a few exceptionally good third-party components. If you are new to photography, you might want to start with my article "Building a Digital SLR System".
"apt-fast and Axel: Roughly 26x Faster apt-get Installations and Upgrades Monday, 02 June 2008 Updated 12/17/2009 Since apt-fast has gotten popular due to acolades in the Ubuntu community and from mention in Linux Format, I've gotten lots of hits, and a few bugs. I believe that apt-fast is now golden, though, thanks to travisn000 on the PCLinuxOS forums. From now on, you can find the latest version "source" (it's just a shellscript) at http://www.mattparnell.com/linux/apt-fast/ ... the latest version will always be the one named "apt-fast.sh." Yes, this will work for any distro that uses apt-get, and the concept should work most of the others...it may even be as simple as removing wget and replacing it with a symlink to axel. Since I last updated this post, I have started using Archlinux, whose package manager has a system in place that allows any download manager to be used, for example."
Summary: Vimscript provides excellent support for operating on collections of data, a cornerstone of programming. In this third article in the series, learn how to use Vimscript's built-in lists to ease everyday operations such as reformatting lists, filtering sequences of filenames, and sorting sets of line numbers. You'll also walk through examples that demonstrate the power of lists to extend and enhance two common uses of Vim: creating a user-defined function to align assignment operators, and improving the built-in text completions mechanism.
swatch (the “Simple WATCHer”) does. swatch, written 100% in Perl, monitors logs as they're being written to and takes action when it finds something you've told it to look for. This simple, flexible and useful tool is a must-have for any healthily fearful system administrator.
Many enterprise data centers rely on Ethernet for their LAN and data traffic, and on Fibre Channel (FC) networks for their storage infrastructure. With increased adoption of 10GbE in the data center, the availability of Fibre Channel over Ethernet (FCoE), and new lossless 10GbE technologies, it is now possible to consolidate FC SAN storage data flows with LAN and data traffic onto the same unified Ethernet cable. Network convergence will enable enterprises to preserve their existing investments in FC storage, reduce data center costs and complexity, and simplify network management.
Save a file you edited in vim without the needed permissionsI often forget to sudo before editing a file I don't have write permissions on. When you come to save that file and get the infamous "E212: Can't open file for writing", just issue that vim command in order to save the file without the need to save it to a temp file and then copy it back again. :w !sudo tee % Annotated link http://www.diigo.com/bookmark/http%3A%2F%2Fwww.commandlinefu.com%2Fcommands%2Fbrowse%2Fsort-by-votes
Linux Professional Institute (LPI) exam prep Self-study tutorials to help you learn Linux fundamentals and prepare for system administrator certification
device-mapper (dm): working with multipath-tools. Part 1 Filed under: SCSI, Linux — admin @ 10:33 Device-mapper (hereafter, dm) is one of the best collection of device drivers that I have ever worked with. It brings high availability, flexibility and more to the Linux 2.6 kernel. Device-mapper is a Linux 2.6 kernel infrastructure that provides a generic way to create virtual layers of a block device while supporting stripping, mirroring, snapshots, concatenation, multipathing, etc. While many modules are built on top of device-mapper, the focus of this article is on multipath-tools. Note that I will be using the terms multipath, multipath-tools and dm-multipath interchangeably to signify the same package. Also note that dm-multipath is the name of the repackaged multipath-tools redistributed under Red Hat in their Advanced Server Linux distribution.
One of the main advantages of using Negative type film is the ability to capture a wider dynamic range than can be achieved with Reversal types (slide/chromes). Unfortunately the image data is usually compressed into a much smaller density range. The big trade-off is our inability to immediately see the information due to the orange mask.