I am new in this forum. Excuse my bad englisch, I come from Germany.
Now my problem:
echo "hello" > /dev/ttya1 gives a hello to the screen which is connected to ttya1. I search a command which do this right in the other way. A command which write into /dev/ttya1 such like as the caracters comes from the terminal.
I hope you understand.
I think that was the way from a hacker who delete my data. The userscreen looks like as there is a gost at the keybord. The user has seen all steps on his screen but he had no chance to stop it.
The caracters and commands comes so quickly that I think, it must come from a shellscript startet from the hacker. All commands where logged for this tty.