The vi editor has three modes, command mode, insert mode and command line mode.
- Command mode: letters or sequence of letters interactively command vi.
- Insert mode: Text is inserted.
- Command line mode: One enters this mode by typing ":" which puts the command line entry at the foot of the screen.
To delete one character, position the cursor over the character to be deleted and type x . The x command also deletes the space the character occupied—when a letter is removed from the middle of a word, the remaining letters will close up, leaving no gap. You can also delete blank spaces in a line with the x command.
Modes of Operation in vi editor There are three modes of operation in vi:
- Command Mode: When vi starts up, it is in Command Mode.
- Insert mode: This mode enables you to insert text into the file.
- Last Line Mode(Escape Mode): Line Mode is invoked by typing a colon [:], while vi is in Command Mode.
How to save and quit the vi or vim text editor
- If you are currently in insert or append mode, press Esc key.
- Press : (colon).
- Enter the following command (type :x and press Enter key): :x.
- Press ENTER key.
- This will quit the editor, and all changes you have made to the document will be saved to the file.
- To enter vi, type: vi filename <Return>
- To enter insert mode, type: i.
- Type in the text: This is easy.
- To leave insert mode and return to command mode, press: <Esc>
- In command mode, save changes and exit vi by typing: :wq <Return> You are back at the Unix prompt.
Edit the file with vim:
- Open the file in vim with the command "vim".
- Type "/" and then the name of the value you would like to edit and press Enter to search for the value in the file.
- Type "i" to enter insert mode.
- Modify the value that you would like to change using the arrow keys on your keyboard.
Which command is used to close the vi editor? Explanation: The command 'q' just closes the file and 'wq' saves and closes the file.
VI Editing commands
- i - Insert at cursor (goes into insert mode)
- a - Write after cursor (goes into insert mode)
- A - Write at the end of line (goes into insert mode)
- ESC - Terminate insert mode.
- u - Undo last change.
- U - Undo all changes to the entire line.
- o - Open a new line (goes into insert mode)
- dd - Delete line.
Use :s/foo/bar/g to replace all occurrences of the word foo on the current line with the word bar. Use :%s/foo/bar/g to replace all occurrences of the word foo in the current file with the word bar. Leaving off the g at the end only replaces the first occurrence of foo on each line of the current file.
What does the following command do? Explanation: vi editor can be used for creating and editing files. In the above command, if file001 already exists, then the contents of the file will be displayed. Otherwise, an empty file named file001 will be created.
Running Programs via Terminal Window
- Click on the Windows Start button.
- Type “cmd” (without the quotes) and hit Return.
- Change directory to your jythonMusic folder (e.g., type “cd DesktopjythonMusic” – or wherever your jythonMusic folder is stored).
- Type “jython -i filename.py“, where “filename.py” is the name of one of your programs.
Vi or the Visual Editor is the default text editor that comes with most Linux systems. It is a Terminal-based text editor that users need to learn, essentially when more user-friendly text editors are not available on the system. You can use Vi as an excellent html editor.
Cut and paste:
- Position the cursor where you want to begin cutting.
- Press v to select characters (or uppercase V to select whole lines).
- Move the cursor to the end of what you want to cut.
- Press d to cut (or y to copy).
- Move to where you would like to paste.
- Press P to paste before the cursor, or p to paste after.
Explanation: For saving a file and to remain in editor we can use ':w' command in ex-mode.
10 Reasons Why You Should Use Vi/Vim Text Editor in Linux
- Vim is Free and Open Source.
- Vim is Always Available.
- Vim Is Well Documented.
- Vim Has A Vibrant Community.
- Vim Is Very Customizable and Extensible.
- Vim Has Portable Configurations.
- Vim Uses Less Amount of System Resources.
- Vim Supports All Programming Languages and File Formats.
If you want to edit a file using terminal, press i to go into insert mode. Edit your file and press ESC and then :w to save changes and :q to quit.
Save as a different, or older, format
- Click the File tab.
- Click Save As.
- Choose a file location, such as OneDrive or This PC to store your file.
- In the File name box, enter a new name for the file.
- In the Save as type list, click the file format that you want to save the file in.
- Click Save.
Steps to write and execute a script
- Open the terminal. Go to the directory where you want to create your script.
- Create a file with . sh extension.
- Write the script in the file using an editor.
- Make the script executable with command chmod +x <fileName>.
- Run the script using ./<fileName>.
Follow these steps:
- Run nano hello.sh.
- nano should open up and present an empty file for you to work in.
- Then press Ctrl-X on your keyboard to Exit nano.
- nano will ask you if you want to save the modified file.
- nano will then confirm if you want to save to the file named hello.sh .
For example, if the file was read-only you would use :w! to write it anyway. If the file was modified and you wanted to quit without saving, you would use :q!. :wq! just means force write and quit in one command. The exclamation point usually means to force some action.
Once you have modified a file, press [Esc] shift to the command mode and press :w and hit [Enter] as shown below. To save the file and exit at the same time, you can use the ESC and :x key and hit [Enter] . Optionally, press [Esc] and type Shift + Z Z to save and exit the file.
In order to launch Vim, open a terminal, and type the command vim . You can also open a file by specifying a name: vim foo. txt .
This document shows how to compile and run a C program on Ubuntu Linux using the gcc compiler.
- Open up a terminal. Search for the terminal application in the Dash tool (located as the topmost item in the Launcher).
- Use a text editor to create the C source code. Type the command.
- Compile the program.
- Execute the program.
Using 'vim' to create and edit a file
- Log into your server via SSH.
- Navigate to the directory location you wish to create the file, or edit an existing file.
- Type in vim followed by the name of the file.
- Press the letter i on your keyboard to enter INSERT mode in vim.
- Start typing into the file.
Vi CommandIn this method, we will use the vi command to create a new file and edit it. To create a new file. A vi editor will open then you can start editing your file. Vi is a little bit different than the nano editor, which means for every action you need to do, there is a command that you need to execute first.
User can create a new file using 'Cat' command in unix. Using shell prompt directly user can create a file. Using 'Cat' command user will able to open a specific file also. If user wants to process the file and append data to the specific file use 'Cat' command.
Type the cat command followed by the file or files you want to add to the end of an existing file. Then, type two output redirection symbols ( >> ) followed by the name of the existing file you want to add to.
To create a new file run the cat command followed by the redirection operator > and the name of the file you want to create. Press Enter type the text and once you are done press the CRTL+D to save the files.
Following are some useful ways to
open a file from the
terminal:
Open the
file using cat command.
Open the file using tail command.
- Open File Using cat Command.
- Open File Using less Command.
- Open File Using more Command.
- Open File Using nl Command.
