Ubuntu – How to set Maven home PATH on Ubuntu as User

environment-variablesjavamaven-3

I am new to Ubuntu and Maven. Recently I installed Maven in my system as user and the installation went perfectly, but I can't set path environment variable permanently. I also referred to the following questions but I couldn't solve my problem.

Maven environment variable not working on other terminal

How to permanently set environmental variables PATH and M2_HOME in ubuntu for maven3?

I can set m2_home path in my system as user but when I check if the path is set with mvn -v I get the following error:

Error: JAVA_HOME is not defined correctly. We cannot execute /usr/lib/jvm/jdk1.8.0/bin/java

When I restart the terminal I can't find the path of M2_home. I don't have root access.

Best Answer

Exporting the M2_HOME environment variable is no longer required if you're using Maven 3. The important thing is to have the /bin directory of you maven installation added to the PATH environment variable.

Anyway, personally I find that exporting the M2_HOME env variable makes reconfiguring the location easier at a later time if needed.

The actual error you're reporting is related to JAVA_HOME not being set correctly, but I'll get to that after setting up Maven.

First of all, to have M2_HOME set between terminal restarts you'll have to add the export statement to ~/.bashrc (assuming your shell is bash). This will override any of these environment variables set system wide by /etc/environment

My Maven installation is located at /opt/apache-maven-3.5.4, so to add that to my ~/.bashrc file I could do

echo 'export M2_HOME=/opt/apache-maven-3.5.4' >> ~/.bashrc

And then I would utilize M2_HOME when I add maven to PATH, like so

echo 'export PATH=${M2_HOME}/bin:${PATH}' >> ~/.bashrc

Now configure JAVA_HOME the same way. My java installation is located at /usr/lib/jvm/java-8-oracle/jre/bin/java but when configuring JAVA_HOME some of that path will need to be stripped away.

echo 'export JAVA_HOME=/usr/lib/jvm/java-8-oracle' >> ~/.bashrc

Then, if you start a new terminal you should be able to run mvn -v and get the desired result.

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Ubuntu – How to permanently set environmental variables PATH and M2_HOME in ubuntu for maven3

Update: Eliah pointed out to me that if you are not dynamically building your environment variables, you should store them in /etc/environment. To set M2_HOME and add the bin directory to your PATH, you would modify your /etc/environment as follows. Make sure that you don't just copy/paste, because your /etc/environment file might have a different PATH variable than mine does.

M2_HOME="/home/gaurav/Java/maven3"
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/home/gaurav/Java/maven3/bin"

Alternative (not as recommended) method: Like Mitch said, you'll need to edit a configuration file to permanently change your PATH. I chose to edit my /etc/profile configuration file, because it applies system-wide. To edit this file, run sudo nano /etc/profile Here's the relevant excerpt from my configuration file:

# /etc/profile: system-wide .profile file for the Bourne shell (sh(1))
# and Bourne compatible shells (bash(1), ksh(1), ash(1), ...).

JAVA_HOME=/usr/lib/jvm/java-6-oracle/
export JAVA_HOME

M2_HOME=/usr/local/apache-maven/apache-maven-3.0.4
export M2_HOME
M2=$M2_HOME/bin
export M2

PATH=$PATH:$JAVA_HOME
PATH=$PATH:$M2
export PATH

Ubuntu – Ubuntu adding path/Environment variables

Add those export lines to your ~/.profile file.

If you want it to apply to all users on the system, put it in /etc/profile instead;

sudoedit /etc/profile

Once you've edited either, you'll see the effect next time you log in.

On a side-note, if you instead install maven via the software center or apt-get, you won't need to do any of the above.

Best Answer

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Ubuntu – How to permanently set environmental variables PATH and M2_HOME in ubuntu for maven3

Ubuntu – Ubuntu adding path/Environment variables

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