On Wed, 8 Dec 2004, Benjamin J. Weiss wrote:
All,
I'm putting up a new email server, but I can't afford downtime when I switch servers. So, I've been writing a script that will take a CentOS install and turn it into a secure email server with Spam Assassin, Amavis-new, ClamAV and external relay using SASL authentication.
The script is still *very* raw, and I'm relatively new to bash script writing. I still have some areas of work to do:
If you are new to bash, or programming in general, I think you might find learning python is more specifically suited to the task, and more powerful.
However bash can work quite nicely for a lot of things ;-)
- I need to figure out how to automate the certificate generation. Right
now I still have to type in a password at the prompt, as well as hit <enter> to accept the defaults
have you looked at "expect"? It is designed for this sort of operation. There are modules for python or perl both, and I imagine you could also get it to work from the shell. We have scripts for apache ssl cert generation that use pyexpect.
- Some of my sed commands are kludgy. I'm still learning the ins and outs
of sed
If you are doing search/replace filters, many sed commands can be replaced from the shell with perl's re interpreter by doing: perl -pi.orig -e 's/search-this/replace-with-this/' filename which is more overhead, buts lets you make a backup file (named filename.orig), and gives you the power of perl's re engine, which is arguably more forgiving in syntax than sed.
I have *no* idea whether or not Vipul's Razor is working or not.
I need to fix the yum "extras" section.
I need to improve the iptables handling.
Anyway, if you guys'd like to take a look and make comments, I'm open to suggestions and whatnot.
It's at:
http://www.benjamin.weiss.name/mail-server.sh
Thanks!
Ben
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