Update cheatsheets

tldr/linux/evtest

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# evtest
+
+> Display information from input device drivers.
+> More information: <https://manned.org/evtest>.
+
+- List all detected input devices:
+
+`sudo evtest`
+
+- Display events from a specific input device:
+
+`sudo evtest /dev/input/event{{number}}`
+
+- Grab the device exclusively, preventing other clients from receiving events:
+
+`sudo evtest --grab /dev/input/event{{number}}`
+
+- Query the state of a specific key or button on an input device:
+
+`sudo evtest --query /dev/input/event{{number}} {{event_type}} {{event_code}}`