Free and Open Source blogger with an attitude
Stuff about Ubuntu and Debian GNU/Linux
This is the quickest way to limit the number of connection to your SSH server with iptables.
[bash]
sudo /sbin/iptables -A INPUT -p tcp –syn –dport 22 -m connlimit –connlimit-above 5 -j REJECT
[/bash]
This will only allow up to 5 concurrent connections to the SSH server, subsequent connections will be rejected by iptables, thus this can thwarts Brute-force attempts to your server.
More Articles About Securing SSH Server
The video shows how cool Dell Inspiron Duo is when running Ubuntu.
This particular demo uses Ubuntu 10.10 (Maverick Meerkat) with Ubermix customization, which contains a collection of application suitable for netbook users.
Ubermix can be downloaded from its official website, please check the Netbook/table model specific instructions for proper installations.
Supported Netbooks
Netbooks)
Scientists, academicians and researchers are a group of users that benefits greatly from Free and Open Source Software (FOSS / FLOSS). Most them would use free software not only to help in preparing graph and documentation, but also as the main tool in their investigation.
Although it is not explicitly required by the software license or by software authors, the role of free software should be appropriately attributed by academicians and scientists who used them in their investigations as it would not only acknowledge the contribution of free software authors (some of them are hardworking academicians or scientists themselves), but this will also done to fulfill the academic accountability on the researchers part.
Examples on how to attribute Free Software use in Academic Paper
1. Researchers/Academician may cite the software URL and the software author in the “Literature Review/Background”, “Methods”or “Acknowledgement section” in the articles.
2. The citation should include the software release number and the URL to download the software in order to help other researchers to replicate the work (publishing paper is all about guiding others to replicate the investigation)
3. If free software being used as the main tool in the investigation, it would be helpful if the academician/researcher could explain why this particular Free Software is chosen for the research, etc in their journal article or academic papers.
For more examples: Visit the Debian Free Software Guideline, there’s a section about attributing free software in scientific and academic papers.
Give credit to Free Software! Please share this post
If you are an academician or researcher, then please share this post because it will increase awareness about the need to properly attribute free software tools, software author and their role in scientific community.
Thanks!
Debian project has released update on Debian 6.0 (Squeeze) which addressed several security issues and bugfix. Debian Squeeze users are advised to update their installation using “apt-get update” and “apt-get upgrade” command to ensure all of the updates are installed properly.
p/s: Although I currently use Ubuntu, I was actually a Debian user and I continue to use Debian on my VPS to host this website till this very day. Without Debian, I would never has discovered thousands of wonderful open source software in it vast software repositories :)
The upcoming Ubuntu 11.10 release (Oneiric Ocelot) will drop Synaptic Package Manager from default installation in favor of Ubuntu Software Center.
This has been foreseen since Canonical has spend their effort in developing and improving Ubuntu Software Center as a convenience one-stop center to install free and paid software alike.
Personal Thoughts
Personally, I still prefer to use Synaptic Package Manager over Ubuntu Software Center as it is still doesn’t offer the same number of options that I used to get from Synaptic (ability to search by name, description, ability to test the fastest mirror).
But I believe the changes that Canonical and Ubuntu community made might make it easier to streamline the looks and functionality of package manager into desktop environment (Unity) regardless of the computing platform.
sudo is probably the most used command in Ubuntu.
In this post, I will show you how to make ‘sudo’ display funny and humorous error messages in Ubuntu Linux.
To do that, you would only need to edit the /etc/sudoers :
sudo nano /etc/sudoers
Then find the line that starts with Defaults env_reset, add insults at the end of the line so it would look like this:
# See the man page for details on how to write a sudoers file
#
Defaults env_reset, insults
Save the file, and you are done! You can test the results by running the sudo command and entering the wrong password.
Screenshot Demo
