So, we can resume:
There are two methods to upgrade NS 6.5 to NS 6.7:
1. Successive updates from 6.5 to 6.6 and then from 6.6 to 6.7, according those docs:
2. Directly update from NS 6.5 to 6.7 (Tested by @Technet on VM) :
a. Make sure the system is fully updated:
b. Installing “yum-presto” should reduce the total download size:
yum install yum-presto
c. Since repository configuration has changed, remove the old configuration file:
rm -f /etc/yum.repos.d/NethServer.repo
d. Start the upgrade:
yum -c http://mirror.nethserver.org/nethserver/nethserver-6.6.conf update
e. Make sure the new system is fully updated:
f. Clean up yum cache and run update again (optional):
yum clean all && yum update
g. Finally, reboot the system (optional).
I’m I right?