If you are looking for an Online Linux Course or an Online Linux Classes i personally refer you to linux.org they offer vast tutorials from beginners to intermediate level Linux courses up to Advanced Linux Course. Their intermediate course covers from basic to advance Linux System Administration plus tips and tricks that you can use on your Linux daily System Administration. So go ahead go to their website to learn more…

Linux Online -http://www.linux.org

Netstat (network statistics) is a command-line tool that displays network connections (both incoming and outgoing), routing tables, and a number of network interface statistics. Netstat is a useful tool for checking your network configuration and activity.

Examples:

netstat

Displays generic net statistics of the host you are currently connected to.

netstat -an

Shows all connections to the server including the source and destination ips and ports if you have proper permissions.

netstat -rn

Displays routing table for all ips bound to the server.

netstat -an |grep :80 |wc -l

Display the amount of active connections on port 80. Removing the pipe and wc command would display each connection.

netstat -natp

Display active Internet connections.

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The official Linux Penguin chosen by Linus Torvalds and is now distributed as part of the Kernel. The penguin was designed by Larry Ewing.

The quote is from when Linus announced Linux v2.0 on Usenet:

Some people have told me they don’t think a fat penguin really embodies the grace of Linux, which just tells me they have never seen a angry penguin charging at them in excess of 100mph. They’d be a lot more careful about what they say if they had.
– Linus Torvalds

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I just came across this site which feature the new Ubuntu SE (Satanic Edition) i was amazed by the graphics, Themes and Wallpapers that this site has to offer, But i think this is not an official Ubuntu Edition. I’m not that religious but it is up to you guys to check what this site has to offer.

What is Ubuntu Satanic Edition?

Ubuntu SE is not currently a distro, it’s more a series of themes to transform the look of Ubuntu. You must first download and install one of the standard Ubuntu variants and then upgrade to Ubuntu SE. Don’t worry; you can easily change your system back if you intend to recant.

http://ubuntusatanic.org/