kernel-based keylogger for Linux

[sendersu]

According to kernel module it works with keyboard only, eg: register_keyboard_notifier(), etc

the ssh/putty(=telnet) are not using keyboard, they are network (socket) based protocols, so one would need to intercept tcp/udp sockets.... thats totally different type of logger I guess

keep in mind you might have thousands of open sockets in a system (and just 1 keyboard!)