Open terminal and put the command
| sudo apt-get update
Install Java on your Ubuntu: 
sudo apt-get install openjdk-7-jdk 
Install ant on your Ubuntu: 
sudo apt-get install ant 
Install maven on your Ubuntu: 
sudo apt-get install maven 
Install Apache Tomcat 7: 
sudo apt-get install tasksel 
sudo tasksel 
Select the following packages tomcat java server only by putting (*) Add DSpace User to system useradd -m dspace https://github.com/DSpace/DSpace/releases/download/dspace-6.0/dspace-6.0-src-release.tar.gz Install PostgreSQL 9.6 
Add PostgreSQL Apt Repository 
sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt/ `lsb_release -cs`-pgdg main" >> /etc/apt/sources.list.d/pgdg.list' 
wget -q https://www.postgresql.org/media/keys/ACCC4CF8.asc -O - | sudo apt-key add - 
Install PostgreSQL 
sudo apt-get update 
sudo apt-get install postgresql postgresql-contrib 
sudo su - postgre 
createuser --username=postgres --no-superuser --pwprompt dspace 
createdb --username=postgres --owner=dspace --encoding=UNICODE dspace 
psql --username=postgres dspace -c "CREATE EXTENSION pgcrypto;" 
sudo mkdir /build 
sudo chmod -R 777 /build 
cd /build  
Install DSpace repository 
wget https://github.com/DSpace/DSpace/releases/download/dspace-6.0/dspace-6.0-src-release.tar.gz 
tar -zxf dspace-6.0-src-release.tar.gz 
cd /dspace-6.0-src-release 
mvn -U package 
cd dspace/target/dspace-installer  (if target is not available in /dspace, then try try cd /dsapce/dspace-6.0-src-release/dspace/target/dspace-installer) 
sudo ant fresh_install 
Create ADMINISTRATOR for DSpace 
/dspace/bin/dspace create-administrator 
sudo service tomcat7 stop 
udo cp -r /dspace/webapps/xmlui/ /var/lib/tomcat7/webapps 
sudo cp -r /dspace/webapps/oai/ /var/lib/tomcat7/webapps 
sudo cp -r /dspace/webapps/solr/ /var/lib/tomcat7/webapps 
Fix Tomcat permissions, and restart the Tomcat server 
sudo chown tomcat7:tomcat7 /dspace -R 
sudo service tomcat7 start 
Test DSpace xmlui  in your browser 
That is all that is required to install DSpace on Ubuntu. There are two main webapps that provide a similar turn-key repository interface 
http://localhost:8080/xmlui  |