vi /etc/yum.repos.d/aducid.repo

Enable only the aducid-media section

[aducid-media]
name=aducid $releasever
baseurl=file:///media/ADUCID/repository/el$releasever/$basearch/
gpgcheck=0
enabled=1

Copy your installation files to the same directory, as specified above (/media/ADUCID), i.e. replace the original files.

yum clean all  
# if the following is OK …
# (running the following command enables you to check that 
#  * you are using the right yum repository
#  * you are upgrading to the right version
 
yum update aducid-installer
# … then do the others 
yum update aducid-aaa-modules aim aducid-proof 

You will need to update database schema. The process depends on the version, from which the update is being performed.

cd /usr/share/doc/aim-<your-installed-version-eg-4.3.1>

In this directory, there are subdirectories for every previous version supported for DB schema update. (4.0.1, 4.1.0, 4.2.0)

• If updating from 4.0.0, start with directory 4.0.1
• If updating from 4.0.1, start with directory 4.1.0
• If updating from 4.1.0, start with directory 4.2.0

For every directory do the following

cd /usr/share/doc/aim-4.2.1/<directory>
for importfile in `ls *.sql` ; do
   psql -e -d aim -f $importfile
done

• You will probably need to replace newly installed file /opt/aaa/conf/aducid-aaa.conf with the file, you saved in previous steps
• Check also the /opt/tomcat/conf/ADUCID.properties file

systemctl start tomcat9.service
tail -f /opt/tomcat/logs/catalina.out
#
systemctl start aducid-aaa.service
systemctl -l status aducid-aaa.service
#
systemctl start httpd.service
systemctl -l status httpd.service