Can You Downgrade Ubuntu 26.04 to 24.04?
There is no supported way to take Ubuntu 26.04 back to 24.04 in place. Here are the three real paths, ranked by cost, and what each one makes you lose.
#rollback
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ZFS snapshots, clones, rollback and promote
Take, list and diff ZFS snapshots, roll back past newer ones, clone a snapshot, promote the clone so the origin can be destroyed, and read the space columns.