After login to a Linux system, the command console will show up with a prompt label such as # or ~, a shell command can be typed after this prompt and the system can execute the command thereafter. All these operations are handled by shell.Shell is a command language interpreter that executes commands read from the standard input device (keyboard) or from a file. There are different types of shells such as bash, ksh, csh etc. The most commonly used of them is bash and it's also the default one on most Linux distributions.There are two very important configuration files for bash : bas...

I don't think using Emacs can improve one's programming skills, I don't think some famous people used Emacs before can provide something, either. But these famous people encouraged me to learn Emacs when I wanted to give it up. Here I created a list of famous Emacs users.Most of people in this list are not famous because they developed or used Emacs, but they are famous and also use Emacs.Joe Armstrong -- Erlang's authorIn The Setup, Joe mentioned that "I write books using XML markup in emacs (nxml mode)" and "I write code in Emacs".Amelia Andersdotter -- PoliticianIn an interview, Amelia ment...

Microsoft chairman Bill Gates admitted that Ctrl+Alt+Del command was a mistake when he was in a fund raising campaign at Harvard University last week. This command was initially designed to reboot the system.David Rubenstein, the Harvard fund raising campaign chairman, asked Bill Gates : "Why when I turn on my software or computer do I need to have my three fingers to press control,alt and delete? Whose idea was that?"The answer given by Bill Gates is : "Basically because when you turn your computer on, you are going to see some screens and eventually type your password in. You want to have so...

Sometimes when we want to plug out our USB device, but the operating system tells us we cannot plug it out since some other processes are using the USB device. How do we know which process is using our USB device. Here is a simple solution.First, go to Start->All programs->Accessories->System Tools->Resource Monitor. (as in Windows 7, for other Windows systems, you may similar program called Resource Monitor but may not in the same location as in Windows 7).Then, open Resource Monitor and find the CPU tab. In Associated Handler search field. Type in the driver letter to find the ha...

First, let me tell two stories.The first one is one Japan soap factory had a problem that they sometimes shipped empty boxes to the customer without soap inside. So they spend much time and money to invent a X-ray machine to check whether the soap box is empty.The same thing happens in a small factory which doesn't have too much money. The solution of them to solve this problem is they use a desk fan to blow the empty boxes out of the belt and into a bin.The second story is NASA finds that in space with 0 gravity, astronauts cannot use pen to write. So they spend much money on developing a pen...

As a system administrator, you may often need to create a Windows domain of a computer network in which all user accounts, computers, printers and other security principals, are registered with a central database (called a directory service). Also one or more domain controllers need to be deployed to enable managing the domain. In this post, we will show you how to apply Domain Level Group Policy. There are lots of posts which have covered how to promote a Windows server to a Domain Controller. After installing a Windows Server, you can promote the server to a Domain Controller by following in...

1. slYou will see a train moving from the right to left on the screen.Install : $ sudo apt-get install slRun : $ slIt has options like -aiFe:-a An accident seems to happen. You'll feel pity for people who cry for help.-l shows little one.-F It flies.-e Allow interrupt by Ctrl+C.We can also make fun of other people by setting an alias like below:$alias ls=slWhen the user types ls, he will see the train instead of the file list.2. fortuneOutput one statement, it can be a joke, or famous saying. Or if you install the Chinese version, you will get Tang poem as well.Install : $sudo apt-get install ...

As a programmer or system administrator, we have more chances of working on *nix platforms. It's tough experience when first start use *nix as we need to face a black screen without knowing what's behind it. Now, if we can have some resources to rely on, then we will find the beautify of *nix. They are fast, efficient and most importantly sexy. Below are some great tips for helping Linux users get used to Linux.This list is a bit long. So be patient. To get more information on a command mentioned, first try "man ". The best way to learn something is to read the specification first then practic...