Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am running Fedora 16 and just installed Dropbox from their website. After dismissing the successful installer, I received a 'run as root' authentication popup trying to run the command 'sh /tmp/tmp40RGAW'. I am a little suspicious as it doesn't seem to be initiated by an action on my part.

Here are the relevant files:


#!/bin/sh -e
cp /etc/fstab /etc/fstab.bak &&
cat /tmp/tmp9nzubR > /etc/fstab &&
mount -o remount /


# /etc/fstab
# Created by anaconda on Sat Dec 31 00:50:09 2011
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
UUID=78208710-cd4b-495d-9ae0-18b4e3f7a7a1 /                       ext4    defaults,user_xattr        1 1
UUID=17e40587-deb9-424c-83cf-92c51dd9d8a4 swap                    swap    defaults        0 0

Does anybody know what's going on here? Is this something needed by Dropbox?


share|improve this question
up vote 2 down vote accepted

Dropbox is trying to enable extended attributes for your / filesystem. The user_xattr mount option allows creating and modifying extended attributes (xattrs) in the user.* namespace, and Dropbox uses to store various metadata about the files it manages.

I recommend enabling the user xattr support – it is useful to Dropbox, and it won't do any harm otherwise. Edit your fstab, remount the filesystem as in the script, then after some time you can take a look at the attributes stored – getfattr -R -d ~/Dropbox will dump all xattrs for all files inside. I'm not sure what Dropbox keeps there, though.

share|improve this answer
Thanks for the answer grawity! – noobler Feb 12 '12 at 22:44

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.