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Checkpoint module (<code>vzcpt</code>) provides the following general functionality by <code>ioctl</code>s:
* <code>CPT_SUSPEND</code> – moving processes to frozen state (container suspending);
* <code>CPT_DUMP</code> – collecting and saving all container's data to image file (container dumping);
* <code>CPT_KILL</code> – killing a container;
* <code>CPT_RESUME</code> – resuming processes from frozen state to running state.
* <code>CPT_SUSPEND</code> – moving processes to frozen state (container suspending);
* <code>CPT_DUMP</code> – collecting and saving all container's data to image file (container dumping);
* <code>CPT_KILL</code> – killing a container;
* <code>CPT_RESUME</code> – resuming processes from frozen state to running state.