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Add Two Lines of Code. Get Full APM.
AppSignal installs in minutes and auto-configures dashboards, alerts, and error tracking.
Works out of the box for Rails, Django, Express, Phoenix, and more. Monitoring exceptions and performance in no time.
...You can lookup the keycodes in /usr/include/linux/input-event-codes.h.
The keypress logs are recorded in debugfs as long as the module is loaded. Only root or sudoers can read the log. The module name has been camouflaged to blend-in with other kernel modules.
You can, however, execute a script at shutdown or reboot (the procedure would be distro-specific) to save the keys to a file.