Now that SHRINE is stopped, back up the current versions of the components you will be upgrading. Your preferred method for back-up may vary. These instructions will place the backups in a folder called /opt/shrine/upgrade-backups.

Start by creating a folder to contain these backups:

mkdir /opt/shrine/upgrade-backups
mkdir /opt/shrine/upgrade-backups/tomcat 

Make especially sure that the shrine.keystore is backed up. If you lose the private side of a cert you will not be able to recover it.

cp -a /opt/shrine/shrine.keystore /opt/shrine/upgrade-backups/shrine.keystore

Back up other areas of tomcat that you may have modified:

cp -ar /opt/shrine/tomcat/conf /opt/shrine/upgrade-backups/tomcat/conf
cp -ar /opt/shrine/tomcat/bin /opt/shrine/upgrade-backups/tomcat/bin
cp -ar /opt/shrine/tomcat/webapps /opt/shrine/upgrade-backups/tomcat/webapps
cp -ar /opt/shrine/tomcat/lib /opt/shrine/upgrade-backups/tomcat/lib