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I'm trying to install wordpress to a USB stick on a RP3.

I've downloaded the latest version using the following command in to my USB directory:

sudo wget http://wordpress.org/latest.tar.gz

I then try to unpack it using:

sudo tar xzf latest.tar.gz

But I get the following output:

tar: wordpress/wp-config-sample.php: Cannot change ownership to uid 65534, gid 65534: Operation not permitted
tar: wordpress: Cannot change ownership to uid 65534, gid 65534: Operation not permitted
tar: Exiting with failure status due to previous errors

I have set the directory's ownership using the chown command and know that that's OK.

Am I missing something? I'm following the guide here Guide To Install Wordpress On Raspberry Pi

  • How is the USB stick formatted? – Milliways Jan 14 '17 at 0:23
  • FAT32, however I have realised that the stick isn't "mounted", not sure if it needs to be? – SilverShotBee Jan 14 '17 at 5:09
  • I suspect you want sudo tar --no-same-owner xzf latest.tar.gz. When run as uid=0, tar doesn't default to extract files as yourself. If the pi (I haven't checked) limits the uid/gid to less than 65534, you are trying to extract as a user/group that cannot be created. – David C. Rankin Jan 14 '17 at 5:24
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The simple answer is that FAT does not support users, or any other Linux attributes or permissions. The best it can do is inherit the permissions of the mount point. OBVIOUSLY the drive needs to be mounted!

I am not sure if it even makes sense to try to extract Wordpress files to FAT. AFAIK these are just php and js so probably nothing special is required. I don't currently have easy access to a Wordpress installation.

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  • I'm extremely new to this, anything obvious is not obvious to me – SilverShotBee Jan 14 '17 at 8:39
  • @SilverShotBee In which case you would be better installing Wordpress (and presumably LAMP) on your SD Card, the way it is intended. – Milliways Jan 14 '17 at 8:59
  • I at least need to get the uploads on the ssd as there will be multiple videos exceeding 2GB and the SD card will not be future proof as it fills up. A 1TB SSD is Les likely to be filled in the next couple of years. – SilverShotBee Jan 14 '17 at 9:03
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    @SilverShotBee If you wish to use an external drive as a drive for software and not just data file storage , you should reformat your drive from FAT to EXT4 and call it a day, however this drive will not be compatible with Windows and Apple computers without additional drivers. – crasic Aug 3 '17 at 18:51
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    You can also consider using the ssd as a mount point for video files only and leave the drive as is, I believe that wordpress has a way to change the storage path for videos. There are other limitations, FAT has a 4GB file size limit. – crasic Aug 3 '17 at 18:53

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