http status 404

If Dspace shows the error of "http status 404", it means that Tomcat user has no permission to make changes in Dspace folders. 

The lack of Tomcat user  on Dspace folders can also generate problem of reluctant to upload the documents.

Solution

We need to give the permission to the Tomcat user to access Dspace folders, upload and assetstore. First find the Tomcat user name in the Dspace computer. My Tomcat user name is tomcat. Then assign all permissions to write changes in the folders. Open a Terminal and apply following commands:

sudo su

chown -R tomcat /dspace/upload 
chown -R tomcat /dspace/assetstore

Customise the logo of XMLUI interface

Prepare a logo as follows (125x74 pixel). Here image format is PNG.

Place the image in home folder (e.g. /home/vimal).
Open a Linux Terminal and apply following command to copy the logo image to the folder.

cp logo.png /opt/tomcat/webapps/xmlui/themes/Mirage/images

Open the css file to change the logo image attribute. Open a terminal and apply following command. Here Dspace webapps directory located in /opt/tomcat/. Dspace webapps may be located in /dspace folder. Confirm it before the execution of the below command;

leafpad /opt/tomcat/webapps/xmlui/themes/Mirage/lib/css/style.css

Find the following portion from the file.

change the width and height of the logo. Change the logo name.
Go to the Dspace XMLUI home page and refresh the browser.