How To Save On Vim And Create A Backup File?

I’ve found Vim to be an incredibly powerful tool, but it can be a bit intimidating at first, especially when it comes to basic tasks like saving files and creating backups. Let me break it down in a way that’s easy to follow. To save a file in Vim, you’ll typically use the ':w' command. This writes the current buffer to the file you’re editing. If you’re working with a new file and haven’t specified a name yet, you’ll need to provide one, like ':w newfile.txt'. It’s straightforward, but where things get interesting is when you want to create a backup. Vim has a built-in feature for this called 'backup' files. You can enable it by setting 'set backup' in your .vimrc file. When this is turned on, Vim will automatically create a backup file with a '~' appended to the original filename every time you save. For example, if you’re editing 'document.txt', the backup will be 'document.txt~'. This is super handy if you accidentally overwrite something and need to revert.

Now, if you want more control over where these backups are stored, you can customize the 'backupdir' option. By default, Vim saves backups in the same directory as the original file, but you might prefer to keep them in a dedicated folder. You can set this up by adding something like 'set backupdir=~/.vim/backups//' to your .vimrc. The double slash at the end ensures that Vim preserves the directory structure of the original file, which is useful if you’re working with files in different directories. Another neat trick is using ':w! ' to force a write if the file is read-only, though you’ll need the appropriate permissions. And if you ever want to save the file under a different name without closing Vim, ':saveas newfilename' is your friend. It’s a lifesaver when you’re experimenting with changes but don’t want to lose your original work.

For those who like to go the extra mile, Vim also supports persistent undo, which is different from backups but equally useful. By setting 'undofile' and 'undodir', you can keep track of every change you make, even after closing and reopening Vim. This is great for complex edits where you might need to backtrack. And if you’re paranoid about losing data (like I am), combining backups with version control like Git gives you an extra layer of safety. Just remember to commit your changes regularly. Vim’s flexibility is one of its biggest strengths, and once you get the hang of these features, you’ll wonder how you ever lived without them.

It's interesting how Vim handles this. The backup isn't a separate action; it's a side effect of saving when the 'backup' option is set. So, you set the option, then you save with ":w". Vim, before writing, renames the target file to its backup name. Therefore, the backup is created as part of the save. So, the command sequence is: ":set backup" (or in .vimrc), then ":w". If you want to save and quit in one go, ":wq". The backup will be there. It's a bit of a paradigm shift if you're used to explicit 'Save Backup' menus.

I disagree with some of the methods here. The 'backup' option can clutter your directory with ~ files. I prefer using version control like Git for backups. But if you must use Vim's backup, enable it with 'set backup' and maybe 'set backupdir' to a dedicated folder. Then, saving is the standard ":w". The backup is generated on the first write after changes. So, if you edit and then ":w", you get a backup. Subsequent saves to the same session might not create new backups unless the file changes elsewhere. It's a bit nuanced. For simplicity, just remember: set backup, then save as usual.

Man, I've been using Vim for a while, and I still forget to set backup sometimes. The simplest reminder: add 'set backup' to your .vimrc. Then, whenever you save with ":w", you get a backup. The backup file will be in the same folder, named like 'file.txt~'. To save, just type ":w". To save and quit, ":wq". That's it. If you don't want to modify .vimrc, you can type ":set backup" in Vim before saving. But doing it in the config file is better. Then you don't have to think about it; saving automatically means backing up the previous version.