Upgrade to Zentyal 6.0

Before upgrade

1. close port 25 on the firewall and maybe also the access to samba shares
2. do a snapshot
3. make a copy of the stubs

    cp -ra /usr/share/zentyal/stubs /usr/share/zentyal/stubs.beforeupgrade-6

4. make a copy of the zentyal config

    cp -ra /etc/zentyal /etc/zentyal.beforeupgrade-6

5. make a copy of previous upgrade.log (just in case)

    cp /var/log/zentyal/upgrade.log upgrade-5.1.log 

6. make sure all system updates have been installed (i.e. there are no system updates)
7. some cleanup of previous updates: Ubuntu clean packages after update

Upgrade

1. click on the upgrade button in the web ui
2. wait until in the console it's written that the upgrade is done
3. reboot

Post upgrade

After login in ssh, we get the following message:

You have packages from the Hardware Enablement Stack (HWE) installed that
are going out of support on 2023-04-30.
        
To upgrade to a supported (or longer-supported) configuration:

* Upgrade from Ubuntu 16.04 LTS to Ubuntu 18.04 LTS by running:
sudo do-release-upgrade -p

OR

* Switch to the current security-supported stack by running:
sudo apt-get install linux-image-generic-hwe-18.04

and reboot your system.

So we execute:

sudo apt-get install linux-image-generic-hwe-18.04

Integrate new package conf files

dns.conf

cd /etc/zentyal/
newcp dns.conf
mv dns.conf.dpkg-dist dns.conf

edit dns.conf and replace

intnets =

by

# ARDITI VPN Addresses: 10.244.6.0/24 
intnets = 10.244.6.0/24,89.109.64.206/32

samba.conf

cd /etc/zentyal/
newcp samba.conf
mv samba.conf.dpkg-dist samba.conf

Edit samba.conf and replace

#exclude = *.tmp|*.temp

by

exclude = *.tmp|*.temp|~*|*.~??|Thumbs.db|.~*|*.TMP

Integrate new stubs

stubs/samba changes

shares.conf.mas

New shares configuration introduces share level access control. However this is problematic for our setup, because we have permissions set at different level on our directory structures: i.e.

ARDITI ---> sg-ARDITI (RO)
ARDITI/Informatica ---> sg-ARDITI (RO) and sg-Infortmatica (RW)

So, the access at share level means that somebody that connects to ARDITI has RO access, so cannot write in Informatica for example. To fix, go back to previous share access control "read only = No".

copy the default config:

sudo cp /usr/share/zentyal/stubs/samba/shares.conf.mas /etc/zentyal/stubs/samba/

Modify as follows:

    read only = No
#    valid users = <% $share->{validUsers} %>
#    read list = <% $share->{readOnly} %>
#    write list = <% $share->{readWrite} %>
#    admin users = <% $share->{administrators} %>

Replace SOGo logo by ARDITI logo

cp sogo-full.svg /usr/share/GNUstep/SOGo/WebServerResources/img/

Finally

reboot