Install fail on Pi

[Icebuster]

See message #5 which explains the exec errors caused by using 64-bit version on 32-bit OS.
Or using x86(Intel/AMD) exec on ARM CPU or vice versa.

Arduino IDE on Ubuntu 16.04 won't start

Hi, Installed Arduino IDE 1.8.16 on Ubuntu 16.04, as root on a Dell inspiron 3542. It gets as far as having a desktop icon, but this doesn't work. When I invoke the same command "arduino" in the directory I get the following error message: <./arduino: line 35: /home/thomas/arduino/arduino-1.8.16/java/bin/java: cannot execute binary file: Exec format error> Have I got a problem in the Java files? How do I fix this?