CRIU (stands for Checkpoint and Restore in Userspace) is a utility that enables you to set a checkpoint on a running container or an individual application and store its state to disk. You can use data saved to restore the container after a reboot at the same point in time it was checkpointed. It is possible to perform operations like container live migration, snapshots, remote debugging etc.

CRIU is integrated by major container engines such as Docker, Podman, LXC/LXD, OpenVZ, etc for implementing associated functionality. It is also available in respective package repositories for linux distributions.

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