[fpc-pascal] How to use serial or usb-ports in linux

[P. vanderWal]

Hello all,

I wrote a program to control a hobby milling machine.(Profiler, see Elektor-forum). The programm is written in fpc-pascal and using synaser in the windows version for control of the serial port(s).
Now I want to use the program in Debian 8... and or Ubuntu 15... Compiling and running the present version gives "no permission" for the serial/usb ports.
Please advise how to get the program running with these ports. (lazarus 1.2.4 fpc 2.6.4).

Piet, PE0PWA (ham radio call). 
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