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+# ionice
+
+> Get or set program I/O scheduling class and priority.
+> Scheduling classes: 1 (realtime), 2 (best-effort), 3 (idle).
+> Priority levels: 0 (the highest) - 7 (the lowest).
+
+- Set I/O scheduling class of a running process
+
+`ionice -c {{scheduling_class}} -p {{pid}}`
+
+- Run a command with custom I/O scheduling class and priority
+
+`ionice -c {{scheduling_class}} -n {{priority}} {{command}}`
+
+- Print the I/O scheduling class and priority of a running process
+
+`ionice -p {{pid}}`