Apache2 web server will almost always display this information message : "Could not reliably determine the server's fully qualified name"
when it is first started in Ubuntu and Debian server.
The reason behind this message is because the web server fails to find the suitable domain name in the system.
How to remove the message
First, you need to edit “/etc/hosts” file and put your server name of choice in the file. For example:
127.0.0.1 server.mylocal
Then you need to add “ServerName” directive in the “/etc/apache2/apache2.conf” file.
ServerName server.mylocal
Finally, restart the web server for the changes to take effect. You will notice that the information message is gone now.
Bitcoin is a form of decentralize digital currency, so unlike other digital currency services (like e-gold), bitcoin is not susceptible to be frozen, seized or invalidated. Bitcoin can be transfered transfered directly from person to person directly without intermediaries.
Bitcoin are generated over the internet by application called bitcoin miners using a set of algorithm to ensure that the number of generated bitcoin is within predictable and limited range. Though with the numbers of bitcoin in circulation today means that it would require significant processing power to generate bitcoins, it doesn’t stop anybody who are willing to try and mine them.
For a brief introduction to Bitcoin, please watch :
Bitcoin Miner on Ubuntu ?
Enter OpenCL and Bitcoinminer.py which allows bitcoin to be mined using a much more efficient GPU power (certain models of Nvidia and ATI graphic cards only, with appropriate drivers).
Step 1: To install the miner, you need to “install python-pyopencl subversion.
Step 2: Then you need to use subversion to obtain python-jsonrpc, by running:
svn checkout http://svn.json-rpc.org/trunk/python-jsonrpc
cd python-jsonrpc/
sudo python setup.py install
Step 3: Then you need to generate bitcoin.conf file:
cd ..
mkdir .bitcoin
echo "rpcuser=username" > .bitcoin/bitcoin.conf
echo "rpcpassword=password" >> .bitcoin/bitcoin.conf
Step 5: Download bitcoin server for linux
wget http://iweb.dl.sourceforge.net/project/bitcoin/Bitcoin/bitcoin-0.3.19/bitcoin-0.3.19-linux.tar.gz
tar xvf bitcoin-0.3.19-linux.tar.gz
~/bitcoin-0.3.19/bin/64/bitcoin -server&
Step 6: Then finally, running the miner
python poclbm.py -d 0 --user username --pass password
The parameter -d 0 denotes that the miner will use GPU #1 for its bitcoin mining generation, increment it to -d 1 for GPU #2 and so forth. Change the “password” and “username” parameter from Step 3 and Step 6 appropriately to keep people from reaping the fruits (read: steal bitcoins) of your mining operation.
For more information about mining bitcoins and about Bitcoin in general, please visit : WeUseCoins website
Guake is a fancy Quake-like terminal which lets you access it by using a hotkey (user-customizable). Unobtrusive, Guake slides down from the top of the screen, and can be used while running other desktop applications, providing you with a quick access to the console.
Guake is available from Debian, Ubuntu and Fedora repository or can be downloaded from Guake’s Official Website
The tutorial video is largely aimed for those who are new to Ubuntu. It covers topic ranging from:
Installation (Dual boot & Slideshow)
Pre-Installed Software (LibreOffice 3.3, Firefox 4, Banshee Media Player, Ubuntu One, Software Centre, Puzzle Games, and a 3D shooter)
Desktop & Unity Features (inc Compiz)
Installing Software (few apps to try)
Conclusion
The video is easy to follow and comprehensive. Moreover, its Youtube page contains Chapter Timing bookmarks, which enables user to skip to appropriate chapter without going through the video serially.
