HowTo: Wake Up Computers Using Linux Command [ Wake-on-LAN ( WOL ) ]

Posted on in Categories Debian Linux, Linux, Networking, Ubuntu Linux last updated April 3, 2012

Wake-on-LAN (WOL) is an Ethernet networking standard that allows a server to be turned on by a network message. You need to send ‘magic packets’ to wake-on-lan enabled ethernet adapters and motherboards, in order to switch on the called systems. Make sure you connect the NIC (eth0 or eth1) with the motherboard, and enable the WOL function in the BIOS. This is a quick guide to enable WOL under RHEL / Fedora / CentOS / Debian / Ubuntu Linux.

30 Best Sources For Linux / *BSD / Unix Documentation On the Web

Posted on in Categories Debian Linux, FreeBSD, HP-UX, Linux, Linux distribution, OpenBSD, RedHat/Fedora Linux, Ubuntu Linux, UNIX last updated December 21, 2011

Man pages are written by sys-admin and developers for IT techs, and are intended more as a reference than as a how to. Man pages are very useful for people who are already familiar with Linux, Unix, and BSD operating systems. Use man pages when you just need to know the syntax for particular commands or configuration file, but they are not helpful for new Linux users. Man pages are not good for learning something new for the first time. Here are thirty best documentation sites on the web for learning Linux and Unix like operating systems.

Debian / Ubuntu Linux: Configure Network Bonding [ Teaming / Aggregating NIC ]

Posted on in Categories Debian Linux, Ubuntu Linux last updated September 4, 2011

NIC teaming is nothing but combining or aggregating multiple network connections in parallel. This is done to increase throughput, and to provide redundancy in case one of the links fails or Ethernet card fails. The Linux kernel comes with the bounding driver for aggregating multiple network interfaces into a single logical interface called bond0. In this tutorial, I will explain how to setup bonding under Debian Linux server to aggregate multiple Ethernet devices into a single link, to get higher data rates and link failover.

Debian Linux Version 6.0.2 Released

Posted on in Categories Debian Linux, Download of the day last updated June 25, 2011

Debian Linux version 6.0.2 has been released. This update mainly adds corrections for security problems to the stable release, along with a few adjustments to serious problems. The kernel image used by the installer has been updated to incorporate a number of important and security-related fixes together with support for additional hardware.

Download Debian Linux 6 Squeeze ISO / CD / DVD Images

Posted on in Categories Debian Linux, Download of the day last updated February 6, 2011

Debian GNU/Linux version 6.0 has been released ( jump to download ) after 24 months of constant development and available for download in various media format. Debian 6.0 is a free operating system, coming for the first time in two flavours. Alongside Debian GNU/Linux, Debian GNU/kFreeBSD is introduced with this version as a “technology preview”. It also supports various processor architectures and includes the KDE, GNOME, Xfce, LXDE and other desktop environments. It also features compatibility with the FHS v2.3 and software developed for version 3.2 of the LSB.

HowTo: Create sar Graphs With kSar [ Identifying Linux Bottlenecks ]

Posted on in Categories Debian Linux, fedora linux, File system, Hardware, High performance computing, Howto, Linux, Linux Scalability, Monitoring, Networking last updated December 15, 2009

The sar command collect, report, or save UNIX / Linux system activity information. It will save selected counters in the operating system to the /var/log/sa/sadd file. From the collected data, you get lots of information about your server:

  1. CPU utilization
  2. Memory paging and its utilization
  3. Network I/O, and transfer statistics
  4. Process creation activity
  5. All block devices activity
  6. Interrupts/sec etc.

sar output can be used for identifying server bottlenecks. However, analyzing information provided by sar can be difficult, so use kSar, which can take sar output and plot a nice easy to understand graph over period of time.

Linux / Windows Application For Prevention Of RSI (Repetitive Strain Injury)

Posted on in Categories Debian Linux, Download of the day, Gentoo Linux, Gnome, GNU/Open source, Howto, Linux, Linux desktop, RedHat/Fedora Linux, Software, Sys admin, Ubuntu Linux, UNIX, Windows, windows vista last updated November 4, 2009
workrave-image

Repetitive strain injury (RSI) is occupational overuse syndrome, non-specific arm pain or work related upper limb disorder. RSI caused from overusing the hands to perform a repetitive task, such as typing, writing, or clicking a mouse. Unfortunately, most people do not understand what RSI is or how serious it can be. You can easily prevent RSI using open source software called Workrave.

20 Linux Server Hardening Security Tips

Posted on in Categories Debian Linux, fedora linux, Gentoo Linux, GNU/Open source, Howto, Linux, Monitoring, Networking, package management, RedHat/Fedora Linux, Security, Suse Linux, Sys admin, Tips, Ubuntu Linux last updated October 30, 2009

Securing your Linux server is important to protect your data, intellectual property, and time, from the hands of crackers (hackers). The system administrator is responsible for security Linux box. In this first part of a Linux server security series, I will provide 20 hardening tips for default installation of Linux system.

Use a Linux LiveCD to Avoid Windows Malware For Netbanking

Posted on in Categories Apache, Debian Linux, Howto, Linux, Linux desktop, RedHat/Fedora Linux, Security, Sys admin, Tips, Ubuntu Linux, UNIX, Windows, windows vista last updated October 15, 2009

Internet has revolutionized the way online users can shop and avail banking services like internet Banking from anywhere, anytime without visiting bank. But, how safe is your money with online net-banking which allows to carry out money transfer? Companies and in some case individuals lost anywhere from $10,000 to $500,000 dollars because of a single malware infection. The cyber crooks are targeting innocent MS-Windows user. If you are concerned about how best to protect yourself from this type of fraud, use Linux LiveCD for online banking and avoid Microsoft Windows at all cost.

Celestia 3D Space Simulation Software For Linux / Windows / OS X

Posted on in Categories Debian Linux, Howto, Linux, Linux desktop, Ubuntu Linux last updated September 30, 2009
celestia-europe-Io-jupiter

Celestia is a real-time visual space simulation astronomy program. It is a cross platform, open source software and released under the GNU General Public License. NASA and ESA have used Celestia in their educational and for interfacing to trajectory analysis software. It allows users to travel through an extensive universe, modeled after reality, at any speed, in any direction and at any time in history. Celestia displays and interacts with objects ranging in scale from artificial satellites to entire galaxies in three dimensions using OpenGL. It is a perfect software for astronomer, educator, student, and teacher for astronomy purpose.