chrt: add page (#5398)

pages/linux/chrt.md

@@ -0,0 +1,20 @@
+# chrt
+
+> Manipulate the real-time attributes of a process.
+> More information: <https://man7.org/linux/man-pages/man1/chrt.1.html>.
+
+- Display attributes of a process:
+
+`chrt --pid {{PID}}`
+
+- Display attributes of all threads of a process:
+
+`chrt --all-tasks --pid {{PID}}`
+
+- Display the min/max priority values that can be used with `chrt`:
+
+`chrt --max`
+
+- Set the scheduling policy for a process:
+
+`chrt --pid {{PID}} --{{deadline|idle|batch|rr|fifo|other}}`