from Sohib's message:
I've tried Spark 2.7.3 in deepin OS 64 bit, at first in case of error
could not find or load main class com.install4j.runtime.launcher.launcher
then i try to download install4j.tar.gz on
then extract the file and copy the folder
to the directory where the spark installed. ex: /opt/spark
My Spark successfully executed.