Installing Nexus Repositories on CentOS

Nexus is a repository manager. It allows you to proxy, collect, and manage your dependencies so that you are not constantly juggling a collection of JARs. It makes it easy to distribute your software

The Nexus Repository can be installed in CentOS using the following shell script

Requirements

CentOS — 4GB Ram , 2 CPU

#!/bin/bash
yum --help /dev/null
if [ $? -eq 0 ]
then 
yum install java-1.8.0-openjdk.x86_64 wget -y   
mkdir -p /opt/nexus/   
mkdir -p /tmp/nexus/                           
cd /tmp/nexus
NEXUSURL="https://download.sonatype.com/nexus/3/latest-unix.tar.gz"
wget $NEXUSURL -O nexus.tar.gz
EXTOUT=`tar xzvf nexus.tar.gz`
NEXUSDIR=`echo $EXTOUT | cut -d '/' -f1`
rm -rf /tmp/nexus/nexus.tar.gz
rsync -avzh /tmp/nexus/ /opt/nexus/
useradd nexus
chown -R nexus.nexus /opt/nexus 
cat <<EOT>> /etc/systemd/system/nexus.service
[Unit]                                                                          
Description=nexus service                                                       
After=network.target
[Service]                                                                       
Type=forking                                                                    
LimitNOFILE=65536                                                               
ExecStart=/opt/nexus/$NEXUSDIR/bin/nexus start                                  
ExecStop=/opt/nexus/$NEXUSDIR/bin/nexus stop                                    
User=nexus                                                                      
Restart=on-abort
[Install]                                                                       
WantedBy=multi-user.target
EOT
echo 'run_as_user="nexus"' > /opt/nexus/$NEXUSDIR/bin/nexus.rc
systemctl daemon-reload
systemctl start nexus
systemctl enable nexus
date
else
    echo " This Script only works on CentOS "
fi