Introduction

Apache Maven is a powerful project management tool that is based on POM (project object model). Maven is a tool that can be used for building and managing any Java-based project. Maven contains XML files also referred to as pom.xml which include configuration details, project dependencies, and other data.

This article will show two different ways to install Apache Maven on CentOS 8 and other versions of CentOS.

I. Install Maven on CentOS

Installation of Java: Updating the package index
```
# sudo yum update
```

Install the OpenJDK package:

# sudo yum install java-11-openjdk-devel

Verifying the java installation:

# java -version

Output

openjdk version "11.0.17" 2022-10-18
OpenJDK Runtime Environment (build 11.0.17+8-post-Ubuntu-1ubuntu218.04)
OpenJDK 64-Bit Server VM (build 11.0.17+8-post-Ubuntu-1ubuntu218.04, mixed mode, sharing)

Apache Maven Download

Install "wget" package:
```
# sudo yum install wget
```

Download the stable version of Apache Maven and you can download it to the "/tmp" directory, as shown below:

# sudo wget https://mirrors.ibiblio.org/apache/maven/maven-3/3.6.3/binaries/apache-maven-3.6.3-bin.tar.gz -P /tmp

The file will be downloaded as a .tar.gz file. You can extract it to the "/opt" directory by using the command:
```
# sudo tar xf /tmp/apache-maven-*.tar.gz -C /opt
```
In order to have control of Maven versions and updates, we will create a symbolic link to Maven that points to the Maven installation directory
```
# sudo ln -s /opt/apache-maven-3.6.3 /opt/maven
```
Changing the symlink to point to the newer version is all that is needed to upgrade your Maven installation.

Setup the Environment for Maven

You need to configure a few environment variables, including JAVA_HOME, M3_HOME, and MAVEN_HOME.

Create a new file namedmaven.shinside the/etc/profile.d/directory.
```
# sudo vi /etc/profile.d/maven.sh
```

The configuration below needs to be added to this newly created file:

export JAVA_HOME=/usr/lib/jvm/jre-openjdk
export M2_HOME=/opt/maven
export MAVEN_HOME=/opt/maven
export PATH=${M2_HOME}/bin:${PATH}

Save and close the file.

Provide the required privileges to the file using the command below:
```
# sudo chmod +x /etc/profile.d/maven.sh
```
Load the environment variables using thesourcecommand:
```
# source /etc/profile.d/maven.sh
```

Verify the Maven installation

Use the command mvn -version which will print the Maven version:

# mvn -version

Output

Apache Maven 3.6.3 (84538c9988a25aec085021c365c560670ad80f63)
Maven home: /opt/maven
Java version: 11.0.17, vendor: Red Hat, Inc., runtime: /usr/lib/jvm/java-11-openjdk-11.0.17.0.8-2.el8.x86_64
Default locale: en_IN, platform encoding: UTF-8
OS name: "linux", version: "4.18.0-358.el8.x86_64", arch: "amd64", family: "unix"

II. Install Apache Maven Using yum

Easy and simple to install Maven using Yum. Initially, update the package index by using the following command
```
# sudo yum update
```
Install Maven by using the following command
```
# sudo yum install maven
```
Verify the installation by running themvn -versioncommand:
```
# mvn -version
```