UPGRADE 9.0 FROM PATCH 13 TO PATCH 21

[T714]

Hallo

Is the update via Release 9.0.0.GA.3924.UBUNTU18.64 UBUNTU18_64 NETWORK edition,
Patch 9.0.0_P13
TO
Patch 9.0.0_P21
with
apt-get update
apt-get upgrade

is the process safe?

[L. Mark Stone]

Patches are cumulative so generally safe yes. I believe Zimbra QAs applying patches just one and two patch levels apart, so to be totally safe you should have a rollback mechanism or clone your machine and try the upgrade on the clone first.

I prefer "apt-get dist-upgrade" so as to get newer kernels.

In future I would plan on applying the patches monthly; the last few patches have contained important security updates. One such patch had a recommendation from Zimbra that the patch be applied "immediately".

Hope that helps,
Mark

[T714]

@Mark
thank you for the answer