On the daily build page on cloud-images.ubuntu.com, there are a number of different images published for each architecture, for example:
trusty-server-cloudimg-amd64-disk1.imgtrusty-server-cloudimg-amd64-root.tar.gztrusty-server-cloudimg-amd64-uefi1.imgtrusty-server-cloudimg-amd64.tar.gzWhat is the difference between these different releases?
The best documentation I can find is this wiki page, but it doesn't seem to answer the question.
I don’t need to actually shrink the MBR partition, just the logical volume that contains the root “/” filesystem. It’s ~200GB now, and I need to shrink it to ~150GB to make room for a new logical volume. How do I go about this?
When sending mail, Postfix inserts the authenticated user’s IP and username into the Received header on the email. While this is useful for tracking down who sent a particular email that was sent from your mail server, it also has privacy implications. In a small-scale situation where I can trust all the users not to get their accounts compromised and turned into spam zombies, I’d rather not broadcast IP addresses and account names for all to read. In short, how do I set up Postfix to not send this:
Received: from [x.x.x.x] (pc1.example.com [x.x.x.x]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: user) by mail.example.com (Postfix) with ESMTPSA id CC77010C148 for ; Fri, 11 Nov 2011 04:55:18 +0000 (UTC)
I want to use tinydns to serve up DNS records for my domain name. What is a minimal example of how to set this up in Ubuntu? You can assume that I've already set the name server for the domain to point to the IP of my server.