VI (pronounced “vee-eye”) is a powerful text editor for Unix and Unix-like operating systems. It has been around since the 1970s and is still widely used today. VI is known for its extensive set of commands and its efficient keyboard-driven interface.
VI has two modes: command mode and insert mode. In command mode, VI provides commands for navigation, editing, and other tasks. In insert mode, VI behaves like a more traditional text editor, allowing users to enter text directly.
Here are some commonly used VI commands:
| VI Command | Function (s) |
| i | Enter insert mode at the cursor position
|
| a | Enter insert mode after the cursor position |
| o | Create a new line below the cursor and enter insert mode |
| O | Create a new line above the cursor and enter insert mode
|
| Esc | Exit insert mode and return to command mode |
| h | Move the cursor left |
| j | Move the cursor down |
| k | Move the cursor up |
| l | Move the cursor right |
| w | Move the cursor to the beginning of the next word |
| b | Move the cursor to the beginning of the previous word |
| 0 | Move the cursor to the beginning of the current line
|
| $ | Move the cursor to the end of the current line |
| x | Delete the character under the cursor |
| dd | Delete the current line |
| p | Paste the last deleted or yanked text after the cursor
|
| yy | Yank (copy) the current line
|
| /search_string | Search forward for a string
|
| ?search_string | Search backward for a string |
| :w | Save the current file |
| : wq | Save the current file and exit VI |
| :q! | Quit VI without saving changes |
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