Whenever I use maven in my raspberry pi (if I run commands such as, mvn exec:exec or mvn --version in my terminal), I get the following error:
Dmaven.multiModuleProjectDirectory system propery is not set. Check $M2_HOME environment variable and mvn script match.
I checked my $M2_HOME environmental variable by running echo $M2_HOME in the terminal, and the following is the value:
/opt/apache-maven-3.3.9
So how do I check if it's matched with the mvn script in my raspberry pi (NOOBS)?
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Found a Solution, See Below:
To fix this issue I re-installed maven in my raspberry pi using the Linux instructions from the following tutorial: https://www.tutorialspoint.com/maven/maven_environment_setup.htm
1) Find out where Maven is installed, use the command echo $M2_HOME or the command whereis mvn
- maven is installed in the following path in my raspberry pi: /opt/apache-maven-3.3.9
2) In the terminal enter the following commands to set the environmental variable M2, it'll be the bin folder in the maven installation folder
export M2=$M2_HOME/bin
3) Append M2 to the Path environmental variable
export PATH=$M2:$PATH
4) Now check to see if maven works by running the following command in terminal:
mvn -version
For some reason my changes aren't sticking, so if you close out of your Raspberry Pi you might have to re-do these steps.