calendar sharing/groupware for hardy

Jack Ryder ryder.jack at
Thu Oct 11 16:11:25 UTC 2007

I agree calendar sharing is a missing features under GNU/Linux.

However I recently tested two interesting email server platform for Linux.
- Zimbra Open Source Edition.
- Hula (the open source edition of the former Novell NetMail).
Both are fully supported under Ubuntu (6.06 at least)

Zimbra provides more features and it is a wonderful products but is not
release under GPL.
Hula is still beta but was based on the rock solid Netmail platform. It has
been released under GPL.
I would love that the community invests more efforts into Hula (seems that
Novell totally stops
supporting the project) and makes it come to universe.
I think it is a good basis.
Novell formerly planned to merge Hula with iFolder (GPL as well) to provide
a collaborative solution
for the community but I don't read any recent news about this.

2007/10/11, Dave Kempe <dave at>:
> Hi Guys,
> before I make a wiki page about calendar sharing, I was wondering if
> anyone has any other recent experiences with Calendar sharing with
> ubuntu? from the server side of course.
> I have one I would like to share and think that it represents something
> we will be offering as a calendar sharing solution as an alternative to
> exchange for our SME clients.
> I have a client who already uses Thunderbird and courier imap. They
> lacked internal facing calendar sharing and I hadn't checked the state
> of play recently.
> So I installed lightning (the thunderbird add-in for calendaring) and
> setup Really Simple CalDAV Store:
> It was pretty easy (they provide an apt source) to get going and seeing
> as I already had postgres for their CRM (centric) worked out pretty well.
> So with a little amount of effort (just configuration) I was able to
> have calendars all shared and updated in a read write fashion from
> Thunderbird. Access control is handled by the RSCDS web interface and
> works pretty well, though the group specification needs some work...
> A few points about the solution:
> * Lightning is under heavy development now and will be even nicer by
> Hardy release time
> * RSCDS needs more authentication options. I am happy to contribute
> coder time to make PAM-auth happen, as this would let us tie into other
> authentication schemes. The current auth means you have yet another silo
> of user/passes.
> * RSCDS is begging to be integrated in to Ebox or some other web
> interface for easy access (not that I use or have tried ebox)
> * I think the biggest roadblock to the whole linux-groupware-problem is
> actually Outlook, so I wanted a solution whereby people did not have to
> use it. Thunderbird/IMAP/RSCDS/Webmail(squirrelmail) will get most
> people so far its now a great combo.
> I have tried other shared calendaring solutions on Linux servers with
> windows clients. None worked anywhere near as well as this combination,
> and the most sophisticated (Zimbra, Scalix, etc) a really Outlook
> servers... not interested :) You see the big picture here is that people
> need to stop using Windows on the desktop... and freeing them of Outlook
> is an important first step, as a whole swathe of users are tied to it.
> The only reason to use squirrelmail at present is the large number of
> plugins - change password, Seive rules and/or vacation are important
> user facing admin functions. Aside from that, squirrelmail kinda blows
> for large mailboxes. Its getting better and I prefer v-webmail for my
> inbox and folders (just don't get the plugins)
> Shared calendaring is here people! lets do it :)
> Let me know what you think...
> Dave
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