btrfs-extent-same(8) System Manager's Manual btrfs-extent-same(8) (NAME) btrfs-extent-same - ioctl FIDEDUPRANGE (SYNOPSIS) btrfs-extent-same extent-len file1 offset1 file2 offset2 [...] (DESCRIPTION) btrfs-extent-same ioctl FIDEDUPRANGE . extent-len . (SEE ALSO) o filesystems(5) o btrfs(8) o ioctl_fideduprange(2) o xfs_io(8) btrfs-extent-same March 2014 btrfs-extent-same(8)