Thanks to Dave my server is up and running. That is what we did: Problem is the fact that fldigi is in /usr/bin folder not in /usr/local/bin as it should be for proper operation of Pskmail server ver 1.9.0. So here is an instruction what to do: 1/ go to /usr/local folder: cd /usr/local 2/ Change ownership of /usr/local/bin folder to your use : sudo chown <user name> bin in my case sudo chown robert bin 3/ Copy fldigi to proper folder: cp /usr/bin/fldigi /usr/local/bin 4/ Return ownership of this folder to root: sudo chown root bin That is all. Start your server with pskmail_server command Thanks Dave again, Robert KB2PNM