When I double click on Arduino (executable) there is a warning first "the usb stick contains software intended to be automatically started. Would you like to run it?"
When I click run the error given is "Oops! There was a problem. Unable to locate the program"
The instructions in https://www.arduino.cc/en/Guide/PortableIDE seem straight forward.
I downloaded the linux 64bit from https://www.arduino.cc/en/Main/Software
(I did see some notes about a windows portable version - this inux version has install.sh files etc. I did not run them.)
The tar file was copied to the ext4 formated USB and extracted.
Portable directories were added, then I double clicked on Arduino as above on the USB stick.
Do these instructions work for you? or do you do something else too.
When it says "Unable to locate the program" how do I identify what program it is looking for?
I assume that knows where Arduino is and that Arduino is trying to run another program.
There is the possibility that a simple extract is not enough - the first time I tried on this computer the executable bit was not set on the Arduino executable or the install.sh files.
I have not installed the Arduino IDE on this computer - I thought it is supposed to run off the usb stick.