I am in a similar situation as in this post But I couln't get the solution provided there to work in my situation as the answer seems related to that question only.
In particular, I couldnt understand what was the purpose of
cat my.fifo | nc remotehost.tld 10000
In my case, I have a process running and waiting for input. how can I send input to that process using named pipes?
echo 'h' > /proc/PID/fd/0 it just displays 'h' on the process' window.