Unix/Linux

Installing maven and setting JAVA_HOME on CentOS7.

download binary tar.gz from - https://maven.apache.org/download.cgi

move it to /usr/local/src/

- Run below command to untar the file

# tar -xvzf apache-maven-3.6.3-bin.tar.gz

- Rename the default directory

# mv apache-maven-3.6.3/ apache-mvn/

- Go to /etc/profile.d

# vi maven.sh

#!/bin/bash

# Apache Maven Environment Variables

# MAVEN_HOME for Maven 1 - M2_HOME for Maven 2

export M2_HOME=/usr/local/src//apache-mvn/

export PATH=${M2_HOME}/bin:${PATH}

- change the permission to executable

# chmod +x maven.sh

# source maven.sh

[root@katello ~]# mvn -version

The JAVA_HOME environment variable is not defined correctly

This environment variable is needed to run this program

NB: JAVA_HOME should point to a JDK not a JRE

Ran into this error - I had two versions of JDK installed jdk1.8.0_271-i586 and java-11-openjdk-11.0.9.11-0.el7_9.x86_64

- Simply followed the JAVA_HOME to set to the latest Java version

# .bashrc

# User specific aliases and functions

alias rm='rm -i'

alias cp='cp -i'

alias mv='mv -i'

# Source global definitions

if [ -f /etc/bashrc ]; then

. /etc/bashrc

#export JAVA_HOME=/usr/java/jdk1.8.0_271-i586

export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-11.0.9.11-0.el7_9.x86_64

- This fixed the issue.

[root@katello ~]# mvn -version

Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)

Maven home: /usr/local/src/apache-mvn

Java version: 11.0.9, vendor: Red Hat, Inc., runtime: /usr/lib/jvm/java-11-openjdk-11.0.9.11-0.el7_9.x86_64

Default locale: en_US, platform encoding: UTF-8

OS name: "linux", version: "3.10.0-1127.19.1.el7.x86_64", arch: "amd64", family: "unix"

[root@katello ~]# date

Tue Dec 8 11:54:27 IST 2020

Monday, December 7, 2020