@kahraman451

What specifically are you trying to do? When running:

sudo -u iptv /home/iptv/ligtv/restart_stream stream18

It appears as if you’re trying to run a script, restart_stream and passing an argument, stream18, though when you do, it’s telling you that the command is not found.

If that’s correct, does:

/home/iptv/ligtv/restart_stream

… actually exist? If you run ls /home/iptv/ligtv, does that file show up?