DOWN LOADING TO LIBRARIES - NEWBIE !

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 !!!!

(deleted)

Thought it might be a PI only issue.

Made a guess and used a command ' make root directory or something ' - managed to copy files to Library !!! - haven't tested it yet.

Thanks anyway