Run Level (Init)

For being the Linux user one basic thing that should know is the level of running service called run level. There are 7 run level from 0 through 6 can be found.

Run level Description
0 Halt the system, especially used by Administrators to shut down the system  immediately
1 Single-user mode, usually used for interactive filesystem maintenance when other services like network, web server and file sharing services arestopped
2 Multi user mode
3 Default multi user mode on Red Hat
4 Typically unused
5 Full multiuser mode with GUI login
6 Reboot  the system, especially used by Administrators to reboot the system  immediately

(more…)

April 4, 2010 at 2:36 am Leave a comment

Basic Command

There are more than a thousands of command Linux shell can process. Don’t worry, you can find the command in shell prompt by using “press tab” key or may be either input the initial character and then press “TAB” key to find the required command. But a typical power user is familiar with just a handful. These would include:

  • cat:  Prints the contents of a file. Any text file can be viewed, with the default output being displayed on the monitor.
  • cd:  Change directories. When this command is used without any options, it changes from the current directory to the home directory of the user.
  • chmod:  Change modules (file access permissions).
  • cp:  Copies files and directories.
  • du:  Displays disk usage. (more…)

April 3, 2010 at 12:00 am Leave a comment

Shell!

Every computer systems have the human interface component. In Linux, there is a command prompt to communicate between user and kernel which is known as Shell. There are several shell found in the system such as Bourne shell (sh), Bourne-again shell (bash), Korn shell (ksh), Z shell (zsh) and C shell (csh).  Bourne Shell (sh) is the original shell for the Unix system written by Steve Bourne. In Linux, the default shell is Bourne-again shell (bash) which is a GNU variant of Bourne Shell (sh). (more…)

April 2, 2010 at 11:54 pm Leave a comment

Linux System Installation and Planning

There are several of methods can be used to install linux . It may be from CD/DVD Media or central server across the network. Nowadays, the installation process for the linux is pretty simple likes the installation of Microsoft Windows. Basically, it is need at least two partitions to install Linux, one for the root (/) and swap respectively for simple installation. The user can also customize the partitions according to the specific requirement. (more…)

April 2, 2010 at 3:01 pm Leave a comment

The origin of Linux

“What is linux?”  wonder the person who are the novice or potential user of the Linux.

Linux is a free operating system, in fact its core kernel is the free and open source so that everybody can modify the code as their need. It is developed by Linus Torvalds at early 90s. It is also called Unix like operating system because it is the clone of the Unix which is only support  for the mini computer and main frame computer. Linux itself is just kernel. But, by combining with the GNU tools, we can use it for many purposes. Some Guru said that it should be called GNU/Linux in order to be perfect name of Linux. Nowadays, we can see the usage of Linux in everywhere from small gadget such as mobile phone to enterprise application. (more…)

March 14, 2010 at 11:45 pm Leave a comment


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