this post was submitted on 11 Dec 2025
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shredis intended to overwrite the actual on-disk contents by overwriting data in the file prior to unlinking the files. However,shredisn't as effective on journalled filesystems, because writing in this fashion doesn't overwrite the contents on-disk like this. Normally, ext3, ext4, and btrfs are journalled. Most people are not running ext2 in 2025, save maybe on their/bootpartition, if they have that as a separate partition.