Installing Dspace 3.x on Ubuntu 12.04

Installation of prerequisite applications

Open  Applications > Accessories > Terminal and execute following commands. Text in italics are commands to be executed.

sudo apt-get install openjdk-7-jdk
sudo apt-get install tasksel 
sudo tasksel

Select the following packages.
Use space bar for select applications from list.

[*] LAMP server [*] PostgreSQL database [*] Tomcat Java server

 use tab to select OK button and enter. Packages will start to install.
On the way you have to give MySQL root password. MySQL not necessary for Dspace installation.

sudo apt-get install ant maven
Create the database user (dspace)

sudo su postgres 
createuser -U postgres -d -A -P dspace

enter password for new role (select a password like dspace) Shall the new role be allowed to create more new roles? (y/n) n

Exit from the promp, type exit

Allow the database user (dspace) to connect to the database [If the following command not open, check the postgresql version number and apply in the command]

sudo gedit /etc/postgresql/9.1/main/pg_hba.conf

Add this line to the configuration file at the end:   

local all dspace md5 

save and close the file 

Restart PostgreSQL : sudo su      enter,

then paste the following line and enter

/etc/init.d/postgresql restart

Create the Unix 'dspace' user, update the passwd, create the directory in which you will install dspace, and ensure that the Unix 'dspace' user has write privileges on that directory:

sudo useradd -m dspace

sudo passwd dspace (enter any password like dspace for the new user dspace)

sudo mkdir /dspace

sudo chown dspace /dspace

Create the PostgreSQL 'dspace' database.
sudo -u dspace createdb -U dspace -E UNICODE dspace  

Configure Tomcat to know about the DSpace webapps.
[If the following command not open, check the tomcat version number and apply in the command]

sudo gedit /etc/tomcat7/server.xml

Insert the following chunk of text just above the closing </Host> 

<!-- Define a new context path for all DSpace web apps -->
<Context path="/xmlui" docBase="/dspace/webapps/xmlui" allowLinking="true"/>
<Context path="/sword" docBase="/dspace/webapps/sword" allowLinking="true"/>
<Context path="/oai" docBase="/dspace/webapps/oai" allowLinking="true"/>
<Context path="/jspui" docBase="/dspace/webapps/jspui" allowLinking="true"/>
<Context path="/lni" docBase="/dspace/webapps/lni" allowLinking="true"/>
<Context path="/solr" docBase="/dspace/webapps/solr" allowLinking="true"/>

save and close  the file a

This following  step downloads the compressed archive from SourceForge, and unpacks it in your current directory. The dspace-1.x.x-src-release directory is typically referred to as [dspace-src]. You can also download direct from Sourceforge website.

sudo mkdir /build
sudo chmod -R 777 /build
cd /build

tar -xvjf dspace-3.1-src-release.tar.bz2

cd /build/dspace-3.1-src-release
mvn -U package  
cd dspace/target/dspace-3.1-build
sudo ant fresh_install 
Fix Tomcat permissions, and restart the Tomcat server

sudo chown tomcat7:tomcat7 /dspace -R

Restart Tomcat

/etc/init.d/tomcat7 restart

 Make an initial administrator account (an e-person) in DSpace:

/dspace/bin/dspace create-administrator

Test it out 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