You find some cool piece of software, and you spend a week or so fiddling around with it, but then you decide you like it, and later decide to use it. Well, instead of scrapping everything you’ve been working with and starting over from scratch you just go ahead working with what you’ve got.

Sound familiar? If so, and your software of choice happens to be the DHCP service on OSX 10.5 Server, this post is definitely for you. I went through Server Admin and setup my subnets, static maps, and logging levels. The one thing I forgot to change was the Lease Time. I left it configured to issue leases for a week. No biggie for most folks (including myself) since you’re probably not going to be maxing out your leased IP’s anytime soon. But if you’re like me, it annoys you to have to wait for several leases to expire, and you see duplicate leases for devices in your clients table. Here’s a quick easy fix to clear out all the leases and start fresh (since the option isn’t available via Server Admin):

1. Stop the dhcp server either through Server Admin, or from aTerminal:

% sudo serveradmin stop dhcp

2. delete the file /var/db/dhcpd_leases. You will need root access. Terminal command:

% sudo rm -f /var/db/dhcpd_leases

3. Restart dhcp via server admin or from Terminal:

% sudo serveradmin start dhcp

A very simple Apple Script can be developed to do this (if you have recurring needs). Contact me if you would like it,

-Phenix

Like a champion cyclist knows bike parts,a car buff knows model years, and a sports fan knows win-loss records, all Mac geeks worth the titl

e must know these things.

Marketers and Madison Avenue operators like to reduce consumers to either/or “types”—paper or plastic, boxers or briefs, cotton or cashmere, Honda or Mercedes, Cristal or Bud–you get the idea. But what often fails to register in such a superficial worldview are the specific reasons behind what we choose when presented with a “this or that?” decision.

When it comes to computing, the question is Mac or Windows? And, as a Mac user, your allegiance to your platform of choice–as in marriage–isn’t entered into lightly. But once you renounce the Dark Side and join the growing legions of Mac enthusiasts, it’s not enough to maintain a casual connection to your Mac, iPhone, iPod, or Apple TV. 

The difference between a Mac user and a Mac geek isn’t just how attached you are to your Apple tech–or how often you publicly proclaim that attachment with logo T-shirts, “Think Different” bumper stickers, or by plastering everything you own with Apple logo stickers. Your level of geekitude depends on how deeply you strive to connect with your Mac and OS X–yeah, we know it sounds like psychobabble. The point, friends, is that being a Mac geek is distinguishable from being any other kind of tech geek, because although it helps to have some basic knowledge of technical geekery, like, say, the names of certain coding languages or the fact that Mac OS X is a Unix-type operating system, you need never have written or even seen a line of Unix code to join the ranks of Mac geekdom. All you need, really, is passion for your Apple gadgets–how you show it is up to you.

But to help give you the street cred–that is Mac knowledge–to back up the passion, we present the 50 things you really should know if you want to call yourself a Mac geek. If you’re a recent convert to the Way of the Mac, be sure you stud

y this compendium so you can move up a few levels of geekitude. If you’re a longtime Mac geek, test your know-how against our list–and be sure to let us know what we missed by flaming us at editor@maclife.com.

See original article HERE

-Phenix