trace-cmd: add page (#7820)

pages/linux/trace-cmd.md

@@ -0,0 +1,33 @@
+# trace-cmd
+
+> Utility to interact with the Ftrace Linux kernel internal tracer.
+> This utility only runs as root.
+> More information: <https://manned.org/trace-cmd>.
+
+- Display the status of tracing system:
+
+`trace-cmd stat`
+
+- List available tracers:
+
+`trace-cmd list -t`
+
+- Start tracing with a specific plugin:
+
+`trace-cmd start -p {{timerlat|osnoise|hwlat|blk|mmiotrace|function_graph|wakeup_dl|wakeup_rt|wakeup|function|nop}}`
+
+- View the trace output:
+
+`trace-cmd show`
+
+- Stop the tracing but retain the buffers:
+
+`trace-cmd stop`
+
+- Clear the trace buffers:
+
+`trace-cmd clear`
+
+- Clear the trace buffers and stop tracing:
+
+`trace-cmd reset`