nexus

## update the system packages
sudo apt-get update

## #1: Install OpenJDK 17 on Ubuntu 24.04 LTS
apt install openjdk-17-jdk openjdk-17-jre -y

##Download the SonaType Nexus on Ubuntu using wget
cd /opt 
sudo wget https://download.sonatype.com/nexus/3/latest-unix.tar.gz   


##Extract the Nexus repository setup in /opt directory
tar -zxvf latest-unix.tar.gz     

##Rename the extracted Nexus setup folder to nexus
sudo mv /opt/nexus-3.77.0-08/ /opt/nexus

##As security practice, not to run nexus service using root user, so lets create new user named nexus to run nexus service
sudo adduser nexus   --> give password


##To set no password for nexus user open the visudo file in ubuntu
sudo visudo

##Add below line into it , save and exit
nexus ALL=(ALL) NOPASSWD: ALL

##Give permission to nexus files and nexus directory to nexus user
sudo chown -R nexus:nexus /opt/nexus
sudo chown -R nexus:nexus /opt/sonatype-work        

##To run nexus as service at boot time, open /opt/nexus/bin/nexus.rc file, uncomment it and add nexus user as shown below
sudo nano /opt/nexus/bin/nexus.rc
run_as_user="nexus"   


##To Increase the nexus JVM heap size, you can modify the size as shown below

vi /opt/nexus/bin/nexus.vmoptions

-Xms1024m
-Xmx1024m
-XX:MaxDirectMemorySize=1024m

-XX:LogFile=./sonatype-work/nexus3/log/jvm.log
-XX:-OmitStackTraceInFastThrow
-Djava.net.preferIPv4Stack=true
-Dkaraf.home=.
-Dkaraf.base=.
-Dkaraf.etc=etc/karaf
-Djava.util.logging.config.file=/etc/karaf/java.util.logging.properties
-Dkaraf.data=./sonatype-work/nexus3
-Dkaraf.log=./sonatype-work/nexus3/log
-Djava.io.tmpdir=./sonatype-work/nexus3/tmp 

##To run nexus as service using Systemd
sudo vi /etc/systemd/system/nexus.service


[Unit]
Description=nexus service
After=network.target

[Service]
Type=forking
LimitNOFILE=65536
ExecStart=/opt/nexus/bin/nexus start
ExecStop=/opt/nexus/bin/nexus stop
User=nexus
Restart=on-abort

[Install]
WantedBy=multi-user.target 
----------------------------------------------
TO start the nexus Service

sudo systemctl start nexus 

sudo systemctl enable nexus 

sudo systemctl status nexus  

tail -f /opt/sonatype-work/nexus3/log/nexus.log 

ufw allow 8081/tcp   --> if required

http://server_IP:8081