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December 6, 2016 00:54
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zerofree.sh for pfSense open-source router firmware - zero out unused disk space for virtual disk compaction | See http://supratim-sanyal.blogspot.com/2016/12/zero-out-free-disk-space-on-virtual.html
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| #!/bin/sh -x | |
| # | |
| # --- | |
| # zerofree.sh (pfSense) | |
| # | |
| # Zeroes Out Ununsed Disk Space for subsequent compacting of virtual hard disk | |
| # Tested on pfSense 2.3 / FreeBSD 10.3 | |
| # To execute: nice -19 ./zerofree.sh | |
| # | |
| # Supratim Sanyal - supratim at riseup dot net | |
| # See http://supratim-sanyal.blogspot.com/2016/12/zero-out-free-disk-space-on-virtual.html | |
| # --- | |
| # | |
| cd / | |
| cat /dev/zero > zero.delete-me | |
| rm -v zero.delete-me |
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