user=user1
passwd=pss1
dbname=bdtst

Username=`grep 'user=' db.properties | cut -d'=' -f2`
Password=`grep 'passwd=' db.properties | cut -d'=' -f2`
DatabaseName=`grep 'dbname=' db.properties | cut -d'=' -f2`

echo $Username/$Password@$DatabaseName

@bdtst