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Do I have to copy and share both the .bib and .bak file?

Is this even possible?

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You need to carry/share only the .bib file. Be good in synchronization though .:) – Harish Kumar Mar 7 '14 at 8:38
If you want to edit your bibliography simultaneously on multiple machines you should use a MySQL-server: jabref.sourceforge.net/help/SQLExport.php – DG' Mar 7 '14 at 8:43
The bakckup file is just a copy of the bib-file. I'm not sure this is really on-topic here, except for the question of what the .bak file is. You could use Dropbox, or a version control system such as git connected to e.g. Bitbucket. – Torbjørn T. Mar 7 '14 at 9:11
@TorbjørnT. Thanks. Feel free to flag it if you think it is unrelated. – henry Mar 7 '14 at 9:14
@HarishKumar Thanks, good to know. Don't know what exactly you mean by good in in synchronization though, maybe something was lost in the translation? :) – henry Mar 7 '14 at 9:15
up vote 5 down vote accepted

It is enough to carry only the .bib file. .bak files are the backup files created by JabRef and they are the copies of .bib files useful in case you damage the original file.

Since you are modifying the bib file on different computers, it would be better to use some version control like Git or Dropbox etc so that synchronisation becomes easy, otherwise you may end up with a mess.

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