Long standing demands for integrated support of Apple's iPod/iPhone in Ubuntu is reality now. Alpha 3 release of Ubuntu 10.04 “Lucid Lynx” offers out-of-the-box support for the iPhone and iPod Touch.

you can use "df" command. "df" stands for disk free. This will show total space and available space on a file system. You can use this command for any flavor of Linux and Unix operating systems. You can also use arguments with the "df" for advanced use of the command.

The vi editor is the classic screen editing program for Unix systems and is based on a older line editor called ex. It can be used from any type of terminal because it doesn’t depend on arrow and function keys. It uses standard alphabetic keys for command as well as arrow keys.

You must be in command mode to execute editing commands. Many of the editing commands are case sensitive. They have different meaning depending on whether they are typed as lowercase or upper case. Also, editing commands can be preceded by a number to indicate a repetition of the command.

Deleting characters:
1. X : will delete the character before the cursor