using nested acl's with exim

I wanted to configure rate limiting on our exim server and needed to setup an ACL that I could include in multiple spots in the configuration. The keyword acl = acl_name is supported (referred to as nested ACL's) but the logic took a little bit of thought...

I want to ratelimit users, the acl for that is here:

warn authenticated = *

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using a large floppy image with memdisk

I ran into a snag when trying to update the bios on my PE R210ii, the Bios update is 8MB, too large to fit on a floppy image, so I needed to make a floppy image large enough for the file. I tried increasing the size of the Dell floppy image and that didn't work, so I had to start from scratch with a boot floppy made from windows. Funny enough the first link that came back in my google search was that of my coworker.

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creating a password hash for /etc/shadow (sha512,sha256,md5)

I've run into this enough times that I thought I'd write a little script to do the work for me.
It's just a simple one line call to python, but I wrapped it with some argument parsing.

It's a python script that takes a password and returns the salted sha512 hash by default. sha256 and md5 can be specified with switches.

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