A simple keylogger for Linux written in C. The current version will attempt to detect your keyboard event file automatically.

cd keylog/
sudo ./keylog -f file-to-write-to.txt

This will log all keystrokes to the specified file while the program is running.

cd keylog/
sudo ./keylog -n hostname

This will send all keystrokes to the server running on hostname.

cd keylog/
./server

This will write all keystrokes received from the client to stdout.

cd keylog/
./server -f file-to-write-to.txt

This will write all keystrokes received from the client to the specified file.

Each key press will cause a string representing that key to be written to the chosen location, followed by a newline. When the program quits, an extra newline will be added.

Typing hello world and then quitting the program with Ctrl-C will cause the chosen location to contain the following.

H
E
L
L
O
SPACE
W
O
R
L
D
LEFTCTRL
C

cd keylog/
make

This code was created entirely out of an interest in learning about linux keyboard events. It should never be used on any machine where you are not authorised to log keystrokes.