# Nexus repository installation on Linux

Paul Tomoiu

●

Nexus,

repository,

installation,

Linux

●

Published 2022-12-03

This tutorial explains to you how to install Nexus repository on Linux (CentOS 9).

First, we need to create the directory which will keep nexus software:

mkdir -p /u01/nexus

Download the Nexus repository software from sonatype.com or by using the wget command (from the directory in which we want to keep the software):

cd /u01/nexus
wget https://download.sonatype.com/nexus/3/nexus-3.45.1-01-unix.tar.gz

Unpack the archive and remove the archive:

tar xzf nexus-3.45.1-01-unix.tar.gz
rm nexus-3.45.1-01-unix.tar.gz

Now, we have 2 directories: nexus-3.45.1-01 and sonatype-work. The binaries are in nexus-3.45.1-01.

The binaries are in the /u01/nexus/nexus-3.45.1-01/bin :

pwd
/u01/nexus/nexus-3.45.1-01/bin
ls
contrib  nexus  nexus.rc  nexus.vmoptions

Info

We can set the system environment $NEXUS_HOME=/u01/nexus/nexus-3.45.1-01 and add $NEXUS_HOME/bin in $PATH system environment.

At this point Nexus repository is installed, and we can start it using the following command:

We need to have Java8 installed on the machine in order to start Nexus. Java 8 could be installed using yum install java-1.8.0-openjdk-devel command.

If you don't know where JAVA_HOME is you can run the following command:

echo "JAVA_HOME=$(dirname $(dirname $(readlink $(readlink $(which javac)))))"

INSTALL4J_JAVA_HOME must be defined as well.

export INSTALL4J_JAVA_HOME=$JAVA_HOME

In my case I have :

export INSTALL4J_JAVA_HOME=/usr/lib/jvm/jre-1.8.0-openjdk-1.8.0.362.b01-0.3.ea.el9.x86_64

You can start Nexus using the following command:

cd /u01/nexus/nexus-3.45.1-01/bin
nexus run

and you will see something like this:

2023-01-21 10:46:33,858-0500 INFO  [jetty-main-1] *SYSTEM org.eclipse.jetty.server.handler.ContextHandler - Started o.e.j.w.WebAppContext@6c6c1e2b{Sonatype Nexus,/,file:///u01/nexus/nexus-3.45.1-01/public/,AVAILABLE}
2023-01-21 10:46:33,911-0500 INFO  [jetty-main-1] *SYSTEM org.eclipse.jetty.server.AbstractConnector - Started ServerConnector@c8dec4e{HTTP/1.1, (http/1.1)}{0.0.0.0:8081}
2023-01-21 10:46:33,913-0500 INFO  [jetty-main-1] *SYSTEM org.eclipse.jetty.server.Server - Started @131225ms
2023-01-21 10:46:33,914-0500 INFO  [jetty-main-1] *SYSTEM org.sonatype.nexus.bootstrap.jetty.JettyServer -
-------------------------------------------------

Started Sonatype Nexus OSS 3.45.1-01

-------------------------------------------------

If the port Nexus uses ("8081" by default) is protected, you can open the fort:

firewall-cmd --zone=public --add-port=8081/tcp --permanent
firewall-cmd --reload

Now Nexus is started on your Linux Machine.