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Secure your Linux box with MoBlock

The MoBlock project caters to advanced Linux users and allows them fine-grain control over which hosts are allowed to connect to your computer and which hosts can be connected from the machine. We’ll look at how to install, configure and monitor MoBlock on your Linux machine…

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Ncurses with Ubuntu

Posted by Anonymous Coward | Posted in Linux | Posted on 19-08-2009

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Hi,
I am new to this programming with ncurses. I want to work out few examples on this ncurses. I jus want to know whether this ncurses works with Ubuntu OS? I found tat ncurses doesn come with AIX OS, may be it could be installed as a SupportPac or something, not sure about it.
Can u please lemme know the working of ncurses with Ubuntu?


Thanks

Ubuntu 9.10 vs. Windows 7: No Ordinary October Showdown

Posted by jfeedor | Posted in OpenSource | Posted on 18-08-2009

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Canonical’s Ubuntu 9.10 (Karmic Koala) and Microsoft’s Windows 7 are expected to debut within days of one another in October 2009. Some open source pundits will surely hype a showdown between the two operating systems. But Canonical will need to carefully communicate the broader Ubuntu 9.10 story to media, customers and partners. Here are seven potential steps to success for Canonical and the Ubuntu 9.10 launch.

IP Traffic forwarding

Posted by Anonymous Coward | Posted in Linux | Posted on 17-08-2009

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Hello All

I have the following setup of a network. Client machines sends requests to the server which is (192.168.1.50) running on Ubuntu server 8.04. And this server forwards all incoming traffic from clients to another server (192.168.1.100) when it’s available. The availability is checked periodically using a shell script.

The following NAT rule has been given for the forwarding task.
Rule 1: Iptables –t nat -A PREROUTING -d 192.168.1.50 -j DNAT –to-destination 192.168.1.100

In the event 192.168.1.100 is unavailable the shell script will detect the unavailability and shift the traffic to 192.168.1.200. The current iptable rules are flushed and the following rule is applied.

Rule 2: Iptables –t nat -A PREROUTING -d 192.168.1.50 -j DNAT –to-destination 192.168.1.200

In the normal scenario when 192.168.1.100 is available the forwarding rule (Rule 1) works properly. The issue is when 192.168.1.100 is unavailable and the traffic is shifted to 192.168.1.200 the traffic is not forwarded properly as required. However when 192.168.1.50 is rebooted and Rule 2 is applied the
forwarding happened as required.

ARP cache and router cache was cleared as well but that did not
solve the issue. The issue was solved only after rebooting 192.168.1.50

Any idea that I can get this sone without rebooting 192.168.1.50 ?

Thank you in advance
Anuradha :)

Happy Birthday Debian

Posted by jfeedor | Posted in OpenSource | Posted on 16-08-2009

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Sixteen years ago today, Ian Murdock announced the "imminent completion of a brand-new Linux release". The release was to be called the Debian Linux Release and was the start of one of the most popular community based distributions of Linux. It also became the basis for the Ubuntu Linux distribution. Debian GNU/Linux is renowned for its community’s commitment to a free software philosophy.

The Perfect Desktop – Kubuntu 9.04

Posted by jfeedor | Posted in OpenSource | Posted on 16-08-2009

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This tutorial shows how you can set up a Kubuntu 9.04 desktop that is a full-fledged replacement for a Windows desktop, i.e. that has all the software that people need to do the things they do on their Windows desktops. The advantages are clear: you get a secure system without DRM restrictions that works even on old hardware, and the best thing is: all software comes free of charge. Kubuntu 9.04 is derived from Ubuntu 9.04 and uses the KDE desktop instead of the GNOME desktop.

Writing UDEV rules to get a SCSI scanner working on Ubuntu

Posted by jfeedor | Posted in OpenSource | Posted on 16-08-2009

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I’ve been setting up some Ubuntu Jaunty systems for relatives as an excuse to get rid of a lot of old hardware including some SCSI scanners. I encountered an HP scanner that was supported by sane but not recognized by Ubuntu. The device ended up with the wrong permissions preventing anyone except root from scanning. This is an explanation of how to create a udev rule to automatically fix this type of problem.

How to Upgrade to Alsa 1.0.20 on Ubuntu Jaunty 9.04

Posted by jfeedor | Posted in OpenSource | Posted on 15-08-2009

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Advanced Linux Sound Architecture (known by the acronym ALSA) is a Linux kernel component intended to replace the original Open Sound System (OSS) for providing device drivers for sound cards. If you are experiencing sound issues on Ubuntu Jaunty 9.04 or just want the latest version, you may want to upgrade to ALSA 1.0.20 (Ubuntu Jaunty comes with Alsa version 1.0.18rc3 – you can check this by typing this in a terminal: cat /proc/asound/version). Read on!

Arch Linux 2009.08 Benchmarks

Posted by jfeedor | Posted in OpenSource | Posted on 14-08-2009

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Arch Linux 2009.08 was released earlier this week with a new installer, more automatic configuration settings, many core package updates, and other changes to this growingly popular distribution. At the request of some readers, we have carried out some quick benchmarks to get a general understanding of where Arch Linux 2009.08 is performing in comparison to Ubuntu 9.04.

Importing a remote desktop session via ssh tunnel

Posted by jfeedor | Posted in OpenSource | Posted on 14-08-2009

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At home, I have,2 machines; one running Ubuntu 9.04 (Jaunty) and the other running Ubuntu 8.04 (Hardy). The Hardy machine is used by my family members and I use Jaunty for my experiments. Some times, I would like to test some thing on Hardy also. But most of the times that machine is not free. I use ssh to login to the hardy box and use an ssh tunnel to export the GUI session back to my Jaunty box.

Attempt of prevu Xen 3.4.1 Hypervisor on Ubuntu Jaunty Server (64-bit)

Posted by jfeedor | Posted in OpenSource | Posted on 14-08-2009

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Xenified kernel been installed to run under Xen 3.4.1 was 2.6.30.2 ( aka Suse). To build Xen 3.4.1 Dom0 via Bug Attachments at Please merge xen-3.4 (3.4.0-2) from debian unstable installed “prevu” and performed build to obtain debian packages.