Arduino IDE running in Mint LINUX Mint 18.2 (Sonya) not uploading to Uno r3

Are you selecting Upload Using Programmer? If so, try just hitting the Upload Arrow after making sure you have the correct port selected.

I get the same error on IDE 1.8.5 Linux Mint 18.3 when using Upload Using Programmer with Tools/Programmer: "AVRISP mkII" selected