[linux] How to install maven on redhat linux

Note: When originally posted I was trying to install maven2. Since the main answer is for maven3 I have updated the title. The rest of the question remains as it was originally posted.

I'm trying to install maven2 on a redhat linux box using the command

 yum install maven2

but yum doesn't seem to be able to find maven2.

No package maven2 available

I've run across other posts about this topic, but the answer to the following post suggests to add repos. I add said repos, but run into errors after adding them.

How to install Maven into Red Hat Enterprise Linux 6?

I can only access this box via command line so simply downloading maven from their website is difficult for me.

Pretty much what others said, but using "~/.bash_profile" and step by step (for beginners):

1. Move to home folder and create a new folder for maven artifacts:
   • cd ~ && mkdir installed-packages
2. Go to https://maven.apache.org/download.cgi and wget the latest artifact:
   • If you don't have wget installed: sudo yum install -y wget
   • cd ~/installed-packages
   • wget http://www-eu.apache.org/dist/maven/maven-3/3.5.0/binaries/apache-maven-3.5.0-bin.tar.gz
3. Uncompress the downloaded file:
   • tar -xvf apache-maven-3.5.0-bin.tar.gz
4. Create a symbolic link of the uncompressed file:
   • ln -s ~/installed-packages/apache-maven-3.5.0 /usr/local/apache-maven
5. Edit ~/.bash_profile (This is where environment variables are commonly stored):
   • vi ~/.bash_profile
   • Add the variable: MVN_HOME=/usr/local/apache-maven (do this before PATH variable is defined)
     • (For those who don't know vi tool: Press i key to enable insert mode)
   • Go to the end of the line where PATH variable is defined and append the following: :$MVN_HOME:$MVN_HOME/bin
   • Save changes
     • (For those who don't know vi tool: Press esc key to exit insert mode and :wq! to save and quit file)
6. Reload environment variables:
   • source ~/.bash_profile
7. Confirm that maven command now works properly:
   • mvn --help

Installing maven in Amazon Linux / redhat

--> sudo wget http://repos.fedorapeople.org/repos/dchen/apache-maven/epel-apache-maven.repo -O /etc/yum.repos.d/epel-apache-maven.repo

--> sudo sed -i s/\$releasever/6/g /etc/yum.repos.d/epel-apache-maven.repo

-->sudo yum install -y apache-maven

--> mvn --version

Output looks like

Apache Maven 3.5.2 (138edd61fd100ec658bfa2d307c43b76940a5d7d; 2017-10-18T07:58:13Z) Maven home: /usr/share/apache-maven Java version: 1.8.0_171, vendor: Oracle Corporation Java home: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.171-8.b10.amzn2.x86_64/jre Default locale: en_US, platform encoding: UTF-8 OS name: "linux", version: "4.14.47-64.38.amzn2.x86_64", arch: "amd64", family: "unix"

*If its thrown error related to java please follow the below step to update java 8 *

Installing java 8 in amazon linux/redhat

--> yum search java | grep openjdk

--> yum install java-1.8.0-openjdk-headless.x86_64

--> yum install java-1.8.0-openjdk-devel.x86_64

--> update-alternatives --config java #pick java 1.8 and press 1

--> update-alternatives --config javac #pick java 1.8 and press 2

Thank You

Sometimes you may get "Exception in thread "main" java.lang.NoClassDefFoundError: org/codehaus/classworlds/Launcher" even after setting M2_HOME and PATH parameters correctly.

This exception is because your JDK/Java version need to be updated/installed.

I made the following script:

#!/bin/bash

# Target installation location
MAVEN_HOME="/your/path/here"

# Link to binary tar.gz archive
# See https://maven.apache.org/download.cgi?html_a_name#Files
MAVEN_BINARY_TAR_GZ_ARCHIVE="http://www.trieuvan.com/apache/maven/maven-3/3.3.9/binaries/apache-maven-3.3.9-bin.tar.gz"

# Configuration parameters used to start up the JVM running Maven, i.e. "-Xms256m -Xmx512m"
# See https://maven.apache.org/configure.html
MAVEN_OPTS="" # Optional (not needed)

if [[ ! -d $MAVEN_HOME ]]; then
  # Create nonexistent subdirectories recursively
  mkdir -p $MAVEN_HOME

  # Curl location of tar.gz archive & extract without first directory
  curl -L $MAVEN_BINARY_TAR_GZ_ARCHIVE | tar -xzf - -C $MAVEN_HOME --strip 1

  # Creating a symbolic/soft link to Maven in the primary directory of executable commands on the system
  ln -s $MAVEN_HOME/bin/mvn /usr/bin/mvn

  # Permanently set environmental variable (if not null)
  if [[ -n $MAVEN_OPTS ]]; then
    echo "export MAVEN_OPTS=$MAVEN_OPTS" >> ~/.bashrc
  fi

  # Using MAVEN_HOME, MVN_HOME, or M2 as your env var is irrelevant, what counts
  # is your $PATH environment.
  # See http://stackoverflow.com/questions/26609922/maven-home-mvn-home-or-m2-home
  echo "export PATH=$MAVEN_HOME/bin:$PATH" >> ~/.bashrc
else
  # Do nothing if target installation directory already exists
  echo "'$MAVEN_HOME' already exists, please uninstall existing maven first."
fi