My First Bash-Completion Script

By golly, I’ve finally done it!  I love bash completion and must have it on any shell-based device I own.  I’ve written countless numbers of scripts but for the most part, they’re fairly self-contained — with the exception of the “perms” script.  This script is nice and quick on a one-site box where I can […]

Linux: SSH Strong Public/Private Key Using ssh-keygen

I’ve come to love encryption. My Linux boxes all do not allow password-authentication for SSL and instead use public authentication. I don’t use a standard 1024 or 2048 bit key, I use… a… 16384 bit key.. yeah.. that crazy dude’s the highest ssh-keygen will allow :). If you decide to be as crazy as I […]

Sendmail Failing to Send to Local Domain

I’ve run into this issue a couple of times now so I’m assuming others are as well.  Servers set up on Amazon EC2 with default sendmail configuration seem to get the following error in their /var/log/maillog: 12 Sep 19 19:48:26 DOMAIN sendmail[31192]: q8JJmQQV031192: … User unknown 13 Sep 19 19:48:26 DOMAIN sendmail[31191]: q8JJmQ0D031191: to=orders@DOMAIN.com, ctladdr=DOMAIN.com […]