fatal: detected dubious ownership in repository at '/srv/maat/src/HelloWorld'
To add an exception for this directory, call:

	git config --global --add safe.directory /srv/maat/src/HelloWorld
gcc -o HelloWorld HelloWorld.c
mcs HelloWorld.cs
make: *** No rule to make target '/usr/lib/jvm/java-15-openjdk/bin/java', needed by 'java'.  Stop.