upload

After playing with my board on my MAC I moved to a Hp z400 server running Linux Mint 18.1 64 bit.
I downloaded Arduino 1.8.3 and connected the Uno.
I selected "Fade" from the menu and verified it without problems. When I attempted to upload to the UNO I received the error message below. The tools menu showed the "/dev/ttyACMO" port selected with no other option given in the port expansion menu. I have both disconnected the board and reset it without any change.
Thanks in advance for any help. I want to be able to run examples before I start any projects.

Arduino: 1.8.3 (Linux), Board: "Arduino/Genuino Uno"
Archiving built core (caching) in: /tmp/arduino_cache_568866/core/core_arduino_avr_uno_839f4857e55911a94b0685ff7abcf40e.a
Sketch uses 1150 bytes (3%) of program storage space. Maximum is 32256 bytes.
Global variables use 13 bytes (0%) of dynamic memory, leaving 2035 bytes for local variables. Maximum is 2048 bytes.
An error occurred while uploading the sketch
avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied

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THANK YOU Kprims it worked :slight_smile: