Igor Kromin |   Consultant. Coder. Blogger. Tinkerer. Gamer.

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I've noticed that when I use the OS X tar command that it adds a bunch of files that start with ._ to the archive. These files store extended file information and are useful on OS X, but on a system that does not understand them, they just add clutter.

Luckily there is a way to stop OS X from adding these files.

This is the kind of thing that I was seeing when testing an archive:
 Terminal output
> tar -tvzf update.tgz
-rw-r--r-- ikromin/staff 463 2015-02-05 22:47 fp-interface/themes/ik/._entry-default.tpl
-rw-r--r-- ikromin/staff 1831 2015-02-05 22:47 fp-interface/themes/ik/entry-default.tpl

To stop tar from including these hidden files, set the COPYFILE_DISABLE variable to 1 before running tar, like this:
export COPYFILE_DISABLE=1; tar -cvzf update.tgz fp-interface/themes/ik/entry-default.tpl

To go a step further, just add an alias to your ~/.profile:
alias tar='export COPYFILE_DISABLE=1; tar'


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