What if you want to wipe out all of the edits you have made in a session and then return to the original file? The command:
returns you to the last saved version of the file, so you can start over.
quits the file you're editing and returns you to the UNIX prompt.
With both of these commands, you lose all edits made in the
buffer since the last time you saved the file.
vi normally won't let you throw away your edits. The
exclamation point added to the
:q command causes
vi to override this prohibition, performing the operation even
though the buffer has been modified.
File exists File file exists - use w! [Existing file] File is read only
:w! file to overwrite the existing file, or type
:w newfile to save the edited version in a new file.
:w newfile to write out the buffer into a new file.
If you have write permission for the directory, you can use
mv to replace the original version with your copy of it.
If you don't have write permission for the directory,
:w pathname/file to
write out the buffer to a directory in which you do have write
permission (such as your home directory).
:!rm junkfile to delete a (large) unneeded file and
free some space.
(Starting an ex command with an exclamation point gives you
access to UNIX.)
:!df to see whether there's any space on another file system.
If there is, choose a directory on that file system and write your
file to it with
df is the UNIX command to check a
disk's free space.)
The disk with vi's temporary files is filled up.
/tmp to see whether there are any files you can remove to
gain some disk space.
If there are, create a temporary UNIX shell from which you can remove files or issue
other UNIX commands.
You can create a shell by typing
exit to terminate the shell and return to vi. (On
a Berkeley UNIX system, you can simply type
[CTRL-Z] to suspend vi and return to the UNIX prompt; type
% to return to
Once you've freed up some space, write your file with
Try to force the system to save your buffer with the ex command
:pre (short for
If that doesn't work, look for some files to remove.
[CTRL-Z] if you are using a Berkeley system) to move out of vi and remove
%) to return to vi when you're done.
Then write your file with
The only way to learn vi is to practice. You now know enough to create a new file and to return to the UNIX prompt. Create a file called practice, insert some text, and then save and quit the file.
Open a file called practice in the current directory
|Return to command mode||[ESC]|
|Quit vi, saving edits|