Pat Farrell;211772 Wrote: 
> 
> Yes, that thread has someone saying they think MySql or something needs
> it.
> 

On Debian (dunno about Ubuntu), it is cron that recommends exim4 |
postfix |mail-transfer-agent.  I already stated the reasons, but they
are there in the Debian Packages file.

Here are the details, from cron:
Recommends: exim4 | postfix | mail-transport-agent
Suggests: anacron (>= 2.0-1), logrotate, lockfile-progs, checksecurity

Lookie, there it is.  And if we install logrotate as a suggestion
(which we should):

Depends: libc6 (>= 2.3.5-1), libpopt0 (>= 1.7), libselinux1 (>= 1.30),
cron | anacron | fcron, base-passwd (>= 2.0.3.4)
Recommends: mailx

And then mailx:
Depends: libc6 (>= 2.3.2.ds1-21), liblockfile1 (>= 1.0), exim4 |
mail-transport-agent, base-files (>= 2.2.0)

That adds up to a lot of pressure on apt to install something that
satisfies mail-transport-agent.  For some reason it chose postfix. 
Nullmailer would do at least as well for most people, though postfix in
local mode would work fine, too.

> 
> And perhaps the installation "needs" it to get something else that 
> really is needed. But postfix is not needed by MySql or SlimServer.
> 

No, but both can bring in piles of other things: most specifically cron
for log rotation.  This is why it is useful to install a mailer and why
nullmailer exists.  (It is also useful in instances where apt for some
reason gets mad and kills off the controlling terminal... it then
nicely mails a "oops, i killed your terminal, this is what i was
doing.")

> 
> Chasing this down may be a lot of work, and perhaps not really 
> justified. Package inter-dependancies can get *very* complex.
> 

And real men just install from source?  Or do you reserve such insults
for me and not kdf for some reason?


-- 
snarlydwarf
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