WordPress write to disk issues (LAMP, Ubuntu 14.04)


Everything was working fine until suddenly WordPress can’t write anything to disk, such as update plugins, upload media, etc. Also as a result of this, w3 total cache doesn’t work, because it can’t write to disk.

I have checked to make sure that permissions are set to 755 and owner is www-data (apache user).

Temporarily swithching permissions to 775 or 777 and running an update still didn’t work.

I have even tried to recreate the uploads and upgrade directories.

Nothing works. Any suggestions on a fix for this?



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I would recommend checking a couple things.

1.) Make sure that your web files are owned by the user www-data (this is for Ubuntu or Debian and the line below assumes the default web root for apache).

chown -Rf www-data.www-data /var/www/html

2.) Check that you have not run out of disk space