Bill Page wrote:
>
> I am not aware of any problem with Plone. As far as I know what
> Waldek is running is based on the same virtual machine that both Ralf
> and I are running. This was the version of AxiomWiki that was last
> running at the University of Washington.
Yes. You can see error message. The line:
AttributeError: isBibliographyExportable
seem to be key. Also, I saw some messages about problems
loading CMFBibliographyAT.
> By "obsolete system" are you referring to the version of Ubuntu? The
> wiki VM was running Ubuntu 9-something and although this version of
> now really old I never much worried about this since is was "only a
> VM". Having this old VM accessible only behind an Apache proxy
> running on an up to date current version of Linux seemed like more
> than adequate protection from the hostile Internet to me.
Both Ubuntu and wiki software. Running wiki in VM gives reasonable
protection for host so I decided to run it. However thinking
that this is "only a VM" is wrong IMHO:
- Anybody who breaks into VM can subvert wiki content. For
example sombody can turn wiki into a porn redistribution node,
- After breaking into VM attacker could try to harvest passwords.
If somebody uses the same password in the wiki or Plone and in
more important system the attacker can gain easy access to
other system.
- Even if attacker "only" plants a rootkit he would force us
to reinstall the system. Reinstalling obsolete systems is
a pain because frequently components are no longer available
on the net. Either you have _everything_ backed up or
you may be unable to restore system software.
- It is good to have several lines of defence. If attacker breaks
one the other may limit damage and allow faster detection and
recovery from breakin.
Beside security obsolete system may cause other problems:
- We want to install new verions of FriCAS and other software
in the VM. This may be problematic if VM runs old system.
I many times read "System X is three years old. Everybody
should have upgraded to new version" as justification for
dropping support for older versions.
- We may want bug fixes but they are normally provided only to
newest version.
I wrote about backup above but let me explain it in more detail.
AFAICS the actual wiki content (that is pages written by users,
including revision) has volume below 100 MB. Then there are
files obtained from outside of similar volume, but by their
nature static. Some parts of wiki software contain unique
customization, but that is of limited volume (latexwiki +
mathaction subdirectory are below 1.7MB). So ideally we
should be able to dump few hundred megabytes of data from
the old system, install a new one, put data back and have
wiki running on the new system. Making regular backups
of order of few megabytes is not a problem. Actually,
for incremental backups volume would be much lower.
OTOH backing up virtual disk may take 10 GB which is problematic.
--
Waldek Hebisch
[email protected]
--
You received this message because you are subscribed to the Google Groups
"FriCAS - computer algebra system" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/fricas-devel?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
