On 16.11.2014, Tom Horsley wrote: > A way is to run as root "cp /dev/zero tempfile" for one "tempfile" per partition > until the cp fails due to running out of disk space. That will allocate all > free space and write zeroes to it. Yes. Or "dd if=/dev/zero of=bigfile bs=1M", which is the same. Delete "bigfile" afterwards, and you are done. A single overwrite is enough. On a SSD, you should issue the above command after booting from an external medium and run fstrim after you deleted the bigfile. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org