What is a .un~ file or or why does Vim in the Terminal make the .un~ file?
Solution 1
When you edit and save files, Vim creates a file with the same name as the original file and an un~
extension at the end.
Vim 7.3 contains a new feature persistent undo, that is, undo information
won't be lost when quitting Vim and be stored in a file that ends with .un~
.
You have set the undofile
option, so Vim creates an undo file when saving
the original file. You can stop Vim from creating the backup file, by
clearing the option:
:set noundofile
Note that, by default this option is turned off. You have explicitly
enabled the undofile
option in one of the initialization files. If you
want your undofiles to be stored only in a particular directory, you can
point the undodir
option to a directory that will contain all your
aggregated undofiles.
Source: http://vimhelp.appspot.com/vim_faq.txt.html#faq-7.2
Solution 2
Took me a while to find where to actually put the :set noundofile
command. I am new and I’ll just reply with how I made it not do backups.
- Open vim.
- Type in command mode
:e $HOME/.vimrc
- Write
:set noundofile
- Save & quit:
:wq
Solution 3
Another possible way to avoid vim creating undo files everywhere is set set the undodir to some existing directory, e.g.
if has('persistent_undo') "check if your vim version supports
set undodir=$HOME/.vim/undo "directory where the undo files will be stored
set undofile "turn on the feature
endif
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kaplan
Updated on October 15, 2020Comments
-
kaplan over 3 years
I've noticed I have some dotfiles that end with
.un~
, for example I have a.vividchalk.vim.un~
, but I'm not sure where that came from. It seems like they are created when I use Vim in the Terminal. What are these files? Can have them remove themselves when I close the file I'm editing? -
kaplan over 11 yearsThanks! I'm new to Vim and trying to understand and configure without cargo culting. I see now that setting is coming from
vim-sensible
. Reading the ReadMe on vim-sensible is very helpful. And I learned (from a peepcode screencast) that I can do:verbose set undofile?
and I'll see where that option is set. I think I have that right. -
Dennis about 11 yearsI have Vim 7.3 and persistent undo isn't working for me (I need to have
set undofile
to get the persistent undo). Do other settings interfere with the new feature, e.g.nobackup
ornoswapfile
? -
Josiah Yoder about 9 yearsI think the cream non-cream-vim-installer also sets this enabled by default.
-
ebyrob over 6 yearsOh man!! now I have to remember:
set nobackup set noswapfile set noundofile
in every _vimrc if I don't want puppy tracks??!! You'd think ONE of those could default to off or something... -
Chuck Wolber over 6 yearsIt appears as if vim 8 (at least 8.0.427) has this feature turned on by default. YMMV of course...
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Mário Meyrelles about 4 yearsIt works for my use case, that is a little bit different: using Vim inside ConEmu on Windows. Thanks!
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Cardin almost 4 yearsI got undofiles by default on vim windows installer. Your guide helped me, thanks!
-
Atralb over 3 yearsJust notifying that Vim installed on Windows with the default .exe installer found at vim.org does enable this option by default. At least as of 8.2.
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Eric Duminil about 3 yearsExactly. Vim undo is an extremely valuable tool (when it doesn't litter your folders). I love
:earlier 30m
, for example. -
Eric Duminil about 3 yearsPlease don't! Undo is an extremely valuable feature. You just need to define an undodir.
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Ankit Chawla over 2 yearsThis answer was what worked for me. Thanks.