June 2004
Intermediate to advanced
1056 pages
39h 58m
English
Content preview from Mac OS X Panther in a Nutshell, 2nd Edition
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Name
nvram
Synopsis
nvram [ -p] [-ffilename] [name] [=value]...
Modifies Open Firmware variables, which control
the boot- time behavior of your Macintosh. To list all Open Firmware
variables, use nvram -p. The
Apple Open Firmware page is http://bananajr6000.apple.com.
To change a variable, you must run nvram as root
or as the super_user. To set a variable, use
variable=value.
For example, to configure Mac OS X to boot verbosely, use
nvram
boot-args=-v. (Booting
into Mac OS 9 or earlier resets this.) The table in this section
lists Open Firmware variables. Some variables use the Open Firmware
Device Tree notation (see the TechNotes available at the Apple Open
Firmware page).
Tip
Be careful changing the nvram utility, since
incorrect settings can turn a G4 iMac into a $2000 doorstop. If you
render your computer unbootable, you can reset Open Firmware by
zapping the PRAM. To zap the PRAM, hold down
Option-
-P-R as you start the computer, and then release
the keys when you hear a second startup chime.
Options
-
-ffilename Read the variables to be set from
filename, a text file ofname=valuestatements.-
-p Display all Open Firmware variables.
|
Variable |
Description |
|---|---|
|
auto-boot? |
The automatic boot settings. If |
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.