Have RASPBERRY PI / LINUX / DEBIAN set up with UNO R3
Seems OK eg ' Hello World ' on LCD works
BUT cannot add to Library - downloaded I2C LCD files from GITHUB , unzipped OK , files to new folder in PI/ New documents.
Cannot copy or drag and drop to USR/SHARE/ ARDUINO/LIBRARIES.- PERMISSIONS DENIED.
Cannot create new folder within LIbrary - PERMISSIONS denied
Cannot remove LCD folder to replace with new one [ as suggested ]
Have changed PERMISIONS in Group to READ and WRITE - still doesn't work.
HELP !!!!