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+# ionice
+
+> get/set program io scheduling class and priority
+
+- sets process with PID 89 as an idle io process
+
+`ionice -c 3 -p 89`
+
+- runs 'bash' as a best-effort program with highest priority
+
+`ionice -c 2 -n 0 bash`
+
+- prints the class and priority of the processes with PID 89
+
+`ionice -p 89`