There are many pdf reader available for Linux, and in a former article I’ve took a look at some of the traditional programs, such as Evince, Xpdf or Okular, but sometime you have to do a presentation with a file in PDF format and so you could use some more special effect to keep the attention of your public alive, so let’s take a look at PDFcube and Impressive.
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Inspired from a post by Concepcion Claudio Certad, today I’ve taken a look at a command that I did not known: compgen.
The compgen builtin command expands a list of arguments to generate completion matches, so it allows us to display the commands, functions, directories and aliases available for the current user. In short compgen is a command that displays commands.
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Sometimes you have some firewall that don’t allows you to accept connection other than some specific ports let’s say that you can connect on your VPS or remote server only on the ports 80 (http) and 443 (https), but you need a port also for ssh to manage your vps/server but the port 443 is used by your Web server with its https protocol, so what can you do ?
This is where sslh comes in. It’s a really simple tool that wraps incoming connections to a port and then depending on protocol redirects it onto sshd back on port 22, or to your web server on localhost:443.
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Linux Tycoon is a management game set in the world of the Linux distributions. We will have to create our distribution with the goal of making it the most used and famous in the world.
An interesting thing of this game is the economical plan that its author Bryan Lunduke is “testing”, getting paid by the community for working on open source projects, the goal is to get 4.000 $ in donations every month. In the first month (June 2012) he reached the goal in just 1 week, and so he released this game and other projects he’s working on as GPL software, but sadly just the following month he made a sad post on his blog “Open Source Funded By Donations? Not So Much” where in short he wrote ;
Unfortunately things didn’t quite work out.
, in my point of view this is not a big surprise, I think that a model of recurring donations is not working at the moment, people prefer to spend a bit more just 1 time for a specific goal, than a bit every month.
So perhaps putting a higher goal, like 10/15K $ to release the game under the terms of GPL would be successful and the community would have gained the game as GPL forever, Blender did this and reached the target of 100K $.
So now the game is released as closed source, the good news is that you can have it for just 4 $, but now let’s take a look at the game.
If you are a system administrator and you want to push the performance of your PHP website such as Drupal, WordPress or wrote by you or other programmers, there are good chances that you’ve heard about the Alternate PHP Cache or simply APC.
The Alternative PHP Cache (APC) is a free and open opcode cache for PHP. Its goal is to provide a free, open, and robust framework for caching and optimizing PHP intermediate code.
That everything you’ll read about APC on the php.net site, and i think is not enough in comparison to the huge boost of performance that this small component can give you, for some quick facts check the tests done by Guillermo Garron on his website.