Symlinks

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Before the discovery of the Ramdisk Hack, this was used after 1.1.1 to jailbreak. It involved either symlinking the directories to a sandbox or symlinking the NAND block device, in order to retain the jailbroken state.

This exploit was closed in 1.1.3 when /etc/fstab was changed so that /private/var was mounted with the 'nodev' flag in addition to the others.