How do I change hostname in Ubuntu Linux?

You can see or change hostname of your computer with hostname command.

You need privileged access to use this command.

In terminal, typing hostname gives you the hostname of the computer.

hostname xyz changes the name of your computer to xyz.

Unable to remove old X config backup file /etc/X11/xorg.conf.backup.

Many people complains me that they get error "Unable to remove old X config backup file '/etc/X11/xorg.conf.backup'." after pressing "Save to X configuration file" in nvidia-settings. The reason is very simple, launching nvidia-settings doesn't give you enough permission to write inside /etc/. So run nvidia-settings in the following way:

Press Alt+F2

type gksu nvidia-settings

Protect Your Cars Paintwork

Today's car finishes are very delicate and require special care. Avoid washing your car at automated car washes as this is a sure way of damaging your cars paint work. The best method to clean a car is still doing it by hand. You will need two buckets filled with clean hot or cold water and a wash mitt.


Only use the best car wash products on the market. Do not use any household cleaners as it will damage your cars paint. Park your car in the shade, use a hosepipe to remove and soften the dirt on your cars paintwork. Open the tap just a little as you want a slow flow of water, don't use a strong jet of water because the high pressure will blast dirt particles into the clear cote that protects the base coat. Start with the roof and work your way down.

When you have hosed the car down, open the tap for a stronger jet of water and remove the dirt under the wheel arches, reduce the flow and hose the tires and rims. Follow the directions of the car wash liquid and mix the required quantity into one of the buckets with water. Place both buckets next to the car; dunk the wash mitt into the bucket with the car wash liquid and start washing the roof working your way down. Rinse the mitt frequently in the bucket with clean water. When you have finished washing the car, take the hosepipe and rinse the car to remove the soap suds from the cars paint. Most people don't dry the car, but for the best results dry the car preferably with a microfiber towel or a chamois leather. Use a separate towel or chamois leather for the mags. For the best protection of your cars paintwork polish your car at least once every three months. Always follow the instructions on the polish container. If your car has mags use a good brand of mag cleaner and polish to put the shine back on them. Clean the windows with window cleaner and use tire polish to polish your cars tires. Never use dirty water, cloths or abrasive polishes. When you are finished you can step back and admire your bright and shiny car, knowing that the paintwork on your car will stay in a superb condition for years to come.

Protect Your Cars Paintwork

Today's car finishes are very delicate and require special care. Avoid washing your car at automated car washes as this is a sure way of damaging your cars paint work. The best method to clean a car is still doing it by hand. You will need two buckets filled with clean hot or cold water and a wash mitt.


Only use the best car wash products on the market. Do not use any household cleaners as it will damage your cars paint. Park your car in the shade, use a hosepipe to remove and soften the dirt on your cars paintwork. Open the tap just a little as you want a slow flow of water, don't use a strong jet of water because the high pressure will blast dirt particles into the clear cote that protects the base coat. Start with the roof and work your way down.

When you have hosed the car down, open the tap for a stronger jet of water and remove the dirt under the wheel arches, reduce the flow and hose the tires and rims. Follow the directions of the car wash liquid and mix the required quantity into one of the buckets with water. Place both buckets next to the car; dunk the wash mitt into the bucket with the car wash liquid and start washing the roof working your way down. Rinse the mitt frequently in the bucket with clean water. When you have finished washing the car, take the hosepipe and rinse the car to remove the soap suds from the cars paint. Most people don't dry the car, but for the best results dry the car preferably with a microfiber towel or a chamois leather. Use a separate towel or chamois leather for the mags. For the best protection of your cars paintwork polish your car at least once every three months. Always follow the instructions on the polish container. If your car has mags use a good brand of mag cleaner and polish to put the shine back on them. Clean the windows with window cleaner and use tire polish to polish your cars tires. Never use dirty water, cloths or abrasive polishes. When you are finished you can step back and admire your bright and shiny car, knowing that the paintwork on your car will stay in a superb condition for years to come.

sudo echo

Many people complain that they cant use sudo with echo.
For example people try to do

sudo echo 1 > /etc/file

To know why this fails, lets break the command in two parts.

sudo echo 1
You are just echoing "1".

> /etc/file
You are trying to write something to file inside /etc for which you need root access. But there is no root access as sudo was needlessly used with echo command.

So to use sudo and echo we need help from one command called tee. With tee you can accomplish the above work.

echo 1 | sudo tee /etc/file
echo 1 | sudo tee -a /etc/file

Ubuntu 9.04 to be called Jaunty Jackalope

Jaunty Jackalope is known for its fastness, so will the next version of Ubuntu 9.04 Jaunty Jackalope.

The main goal on this release is to make boot up time or resume time very short and integrating desktop applications and web applications.

Hear from Mark Shuttleworth himself, link

Tank Presidency

Later on 20 January, the president elect Barack Obama will formally appointed as president of the United States. All preparations have been made, including making a "tank" a new presidency.



Tank? Yes, the car is more feasible presidency called tank. Not only because it is designed bulletproof, antimissile, but also because of, according to the designer of the car, there is no "elegant" at all.

"Oh my god ... why Obama is not all just wearing Abrams," so that their comments had to see photos of the car. Abrams tank is a series of powerful United States used in the war in Iraq.

Cars presidency is a Cadillac limousine. Designed for comfort food at a time, because the door is only as thick as 8 inch (20 cm). "With such strength, shooting just will not enjoy break through," said a news agency.

The General Motors, the manufacturer of the Cadillac, ensuring that the model Limo Obama is the original model, not a development model that has been there before. "Cars are made with special specifications, the test has been through various extreme conditions, but in accordance with the principle beauty Cadillac cars," said Joanne Krell K, spokesperson for General Motors.

Of course not opened to the public what is distinctive car, for the security aspects. "What is certain, if the president is in, all the commotion of the world will vanish. He will be in total isolation in the box is a very protected," said Joe Funk, a retired Secret Agency experienced oversee President Bill Clinton.

Said Joe again, although "isolated in the box," but Obama will still be connected with the outside world because all the communication equipment available. How the Internet? There ..! Phone? Do not also asked ... surely available. "Only in a flash, he was able to contact any of the world," said Joe.


Although the car was quite large and heavy, but the engines are made so that the form of energy. The goal clearly is not simply a car that is environmentally friendly. Made energy efficient, because the Secret Department considers the situation worst. For example, should the president was far from the threat, the car still has enough fuel. Not funny, is not it, when the time to secure the president, the car must first drop in gasoline to pom, or Mr. Obama should come out of the car broke down a taxi ago?