See this page for more details about Nexus: https://books.sonatype.com/nexus-book/reference3/

Prerequisites:

• Install Apache Maven

Download Nexus: https://www.sonatype.com/download-oss-sonatype

Extract the file "nexus-3.18.0-01-unix.tar.gz" in the folder you want to install Nexus: /opt/nexus-3.18.0-01
$ tar -xf ~/Downloads/nexus-3.18.0-01-unix.tar.gz -C /opt/
Change folders permissions:
$ sudo chmod -R 755 /opt/nexus-3.18.0-01/ $ sudo chown -R mtitek:mtitek /opt/nexus-3.18.0-01/ $ sudo chmod -R 755 /opt/sonatype-work/ $ sudo chown -R mtitek:mtitek /opt/sonatype-work/
Create a symbolic link: $ sudo ln -s /opt/nexus-3.18.0-01/ /opt/nexus $ sudo chown -R mtitek:mtitek /opt/nexus
Change the user who run Nexus:
$ vi /opt/nexus/bin/nexus run_as_user='mtitek'
Setup the nexus home environemnt variable:
$ vi .profile export NEXUS_HOME=/opt/nexus export PATH=$PATH:$NEXUS_HOME/bin
Load ".profile" environment variables: $ source ~/.profile
Start Nexus:
$ /opt/nexus/bin/nexus start
Access the default page of Nexus: http://localhost:8081



Other Nexus commands:
Usage: /opt/nexus/bin/nexus {start|stop|run|run-redirect|status|restart|force-reload}
Log directory:
$ ls -al /opt/sonatype-work/nexus3/log

To access the "Server administration and configuration" page you must "Sign In".
The default "admin" password can be found in this file: "/opt/sonatype-work/nexus3/admin.password"



The first time you sign-in, you will see a wizard that will help you complete required setup tasks:

• Setup:
  
  
  
• Please choose a password for the admin user:
  
  
  
• Configure Anonymous Access:
  
  
  
• Complete:
  
  
  

Server administration and configuration:

• Add a "mirror" element (inside element <mirrors>):
  <mirror> <id>nexus</id> <mirrorOf>*</mirrorOf> <url>http://localhost:8081/repository/maven-public/</url> </mirror>
  
• Add "server" elements for Snapshots/Releases (inside element <servers>) You can define only one if you want to use one configuration for both snapshots and releases. The default "admin" password can be found in this file: "/opt/sonatype-work/nexus3/admin.password"
  <server> <id>httpNexusSnapshots</id> <username>admin</username> <password>admin</password> </server> <server> <id>httpNexusReleases</id> <username>admin</username> <password>admin</password> </server>
  
• Add a "profile" element for nexus repositories (inside element <profiles>):
  <profile> <id>nexus</id> <repositories> <repository> <id>central</id> <url>http://central</url> <releases> <enabled>true</enabled> </releases> <snapshots> <enabled>true</enabled> </snapshots> </repository> </repositories> <pluginRepositories> <pluginRepository> <id>central</id> <url>http://central</url> <releases> <enabled>true</enabled> </releases> <snapshots> <enabled>true</enabled> </snapshots> </pluginRepository> </pluginRepositories> </profile>
  
• Add an "activeProfile" element:
  <activeProfiles> <activeProfile>nexus</activeProfile> </activeProfiles>

Create a local directory that will hold the maven project:
$ sudo mkdir /data/workspace $ sudo chmod -R 755 /data/workspace/ $ sudo chown -R mtitek:mtitek /data/workspace/
Run the following command "mvn archetype:generate" to create the maven project:
$ cd /data/workspace/ $ mvn archetype:generate \ -DarchetypeGroupId=org.apache.maven.archetypes \ -DarchetypeArtifactId=maven-archetype-quickstart \ -DarchetypeVersion=1.4 \ -DgroupId=mtitek.nexus.test \ -DartifactId=mtitek-nexus-test-a \ -Dpackage=mtitek.nexus.test \ -Dversion=1.0.0-SNAPSHOT \ -DinteractiveMode=false
Configure the "pom.xml" file of the project "mtitek-nexus-test-a".
Add a "distributionManagement" element to configure the nexus repositories Snapshots and Releases:
$ cd /data/workspace/mtitek-nexus-test-a/ $ vi pom.xml
<distributionManagement> <snapshotRepository> <id>httpNexusSnapshots</id> <name>Snapshots repository</name> <url>http://localhost:8081/repository/maven-snapshots</url> </snapshotRepository> <repository> <id>httpNexusReleases</id> <name>Releases repository</name> <url>http://localhost:8081/repository/maven-releases</url> </repository> </distributionManagement>
Run the follwoing maven command to deploy the maven artifact to nexus:
$ mvn deploy
[INFO] --- maven-deploy-plugin:2.8.2:deploy (default-deploy) @ mtitek-nexus-test-a --- Uploading to httpNexusSnapshots: http://localhost:8081/repository/maven-snapshots/mtitek/nexus/test/mtitek-nexus-test-a/1.0.0-SNAPSHOT/mtitek-nexus-test-a-1.0.0-20161119.020742-1.jar Uploading to httpNexusSnapshots: http://localhost:8081/repository/maven-snapshots/mtitek/nexus/test/mtitek-nexus-test-a/1.0.0-SNAPSHOT/mtitek-nexus-test-a-1.0.0-20161119.020742-1.pom Uploading to httpNexusSnapshots: http://localhost:8081/repository/maven-snapshots/mtitek/nexus/test/mtitek-nexus-test-a/1.0.0-SNAPSHOT/maven-metadata.xml Uploading to httpNexusSnapshots: http://localhost:8081/repository/maven-snapshots/mtitek/nexus/test/mtitek-nexus-test-a/maven-metadata.xml

• Create folders for the "snapshots" and "releases" repositories:
  $ sudo mkdir /data/nexus-repositories /data/nexus-repositories/snapshots /data/nexus-repositories/releases $ sudo chmod -R 775 /data/nexus-repositories $ sudo chown -R mtitek:mtitek /data/nexus-repositories
  
• Follow the following steps to setup a blob store:
  
  • Connect to Nexus Repository Manager (login with "admin").
    
    
  • Click the "Server administration and configuration" link.
    
    
  • Click the "Repository" link.
    
    
  • Click the "Blob Stores" link.
    
    
  • Click the "Create blob store" button.
    
    
  • Select the "Type" and enter a "Name" and a "Path" for the blob store.
    
    
  • Click the "Create blob store" button to save your configuration.
    
  
  
  
  Here are the fields to configure for both the snapshots and releases blob stores.
  Type: File Name: nexus-repositories-snapshots Path: /data/nexus-repositories/snapshots
  Type: File Name: nexus-repositories-releases Path: /data/nexus-repositories/releases
  
  
  
• Follow the following steps to setup the repositories:
  
  • Click the "Server administration and configuration" link.
    
    
  • Click the "Repository" link.
    
    
  • Click the "Repositories" link.
    
    
  • Click the "Create repository" button.
    
    
  • Click the "maven2 (hosted)" link.
    
    
  • Enter a "Name" and Select the "Version policy" and a "Blob store" for the repository.
    
    
  • Click the "Create repository" button to save your configuration.
    
  
  
  
  Here are the fields to configure for both the snapshots and releases repositories.
  Name: nexus-repositories-snapshots Version policy: Snapshot Blob store: nexus-repositories-snapshots
  Name: nexus-repositories-releases Version policy: Release Blob store: nexus-repositories-releases
  You can also define the following properties for your repository:
  
  • Strict Content Type Validation:
    Validate that all content uploaded to this repository is of a MIME type appropriate for the repository format: yes|no
    
    
  • Deployment policy:
    Controls if deployments of and updates to artifacts are allowed
    Deployment policy: Disable redeploy|Allow redeploy|Read-only
    
  
  
  
  
• Configure the "pom.xml" file of your project.
  Add (or modify) the "distributionManagement" element to configure the nexus repositories (Snapshots and Releases):
  $ cd /data/workspace/mtitek-nexus-test-a/ $ vi pom.xml
  <distributionManagement> <snapshotRepository> <id>httpNexusSnapshots</id> <name>Snapshots repository</name> <url>http://localhost:8081/repository/nexus-repositories-snapshots/</url> </snapshotRepository> <repository> <id>httpNexusReleases</id> <name>Releases repository</name> <url>http://localhost:8081/repository/nexus-repositories-releases/</url> </repository> </distributionManagement>
  
• Deploy your project:
  mvn deploy