At least three modes : input mode, command mode, and 'ex' mode.
There are two modes of 'vi' - the visual mode and the 'ex' (line mode) environment. By using the colon you are telling vi to switch to the line mode command environment used by 'ex' or 'ed'.
the text is inputed in vi editor by pressing the i key, that mean get the insert permission into vi editor
The one editor that is absolutely certain to be available on every Linux and Unix distribution is 'vi'. The 'vi' editor is not only the world's greatest editor, it is absolutely ubiquitous in the Unix and Linux world. There are other editors on many Linux systems including many graphical editors, but none hold a candle to 'vi', at least in my humble opinion.NOTE: The 'vi' editor was written by Bill Joy.
You don't. The 'tar' command has nothing to do with the 'vi' editor; it creates an archive files and the vi editor modifies the content of a file.
The 'vi' editor is a text editor; it can edit anything that is displayable ASCII text. You can edit a password in the password file using 'vi' (not recommended).
Command mode, and input mode. You switch between them using the ESC key.The two modes of 'vi' are input mode, and command mode. In input mode all you can do is insert text, and in command mode you can make editing changes to existing text (by issuing commands).Switching between the modes is accomplished by pressing the ESC (escape) key.
vi file name
Vi (pronounced vee-eye), the standard screen-oriented editor provided with Unix operating systems, is the ``visual'' mode of the Ex line editor. Both Vi and Ex commands can be issued from within Vi. Source-The Internet.
'vi' is the standard text editor for Unix. You use it to edit content of a text file.
Your question is uncleear; every time you start the 'vi' editor you get another process.
Unclear question - 'vi' is a utility
vi text editor is a standard text editor found in almost every flavor of Linux, it is the most preferred text editor by most Linux professionals, other text editors include nano and pico are also decent substitutes for the vi editor