After installing the client software, it is necessary to install the root certificate T-TeleSec GlobalRoot Class 2 on your system.
To do this, navigate to the previously created temporary directory and enter the following commands to download and install the certificate.
mkdir /tmp/backup_client/ -p
./dsmcert -add -server "T-TeleSec GlobalRoot Class 2" -file /tmp/backup_client/rootcert.pem
Clear temporary directory
After the installation has been successfully completed, you can remove the temporary directory and the installation packages.
rm -rf /tmp/backup_client/