A Handy Reference List:
Computing
How to reset the root password:
1. Reboot the system.
2. When the boot loader menu appears use the arrow keys to select the distribution install you want to edit. Next press "A".
3. You will be given a grub prompt that looks like the following.
grub append> ro root=LABEL=/
4. Put the word "single" at the end of the grub append prompt and press enter. Note there is a space before the word single.
grub append> ro root=LABEL=/ single
5. The system will boot into single-user mode. At the prompt enter passwd root and enter the new root password.
sh-2.05# passwd root
6. Now reboot the server and you should be able to log back in as root.
- byte (B)
- kilobyte (KB) - 1000^1
- megabyte (MB) - 1000^2
- gigabyte (GB) - 1000^3
- terabyte (TB) - 1000^4
- petabyte (PB) - 1000^5
- exabyte (EB) - 1000^6
- zettabyte (ZB) - 1000^7
- yottabyte (YB) - 1000^8
it is estimated that all the printed material in the world only takes up about five exabytes.
computing, data, size
About the author
MC Dug-T is developerWorks' Minister of Science, droppin' the XML, Java, and Web services 411 on the public. In his travels, he gets mad props from his peeps worldwide for the stone-cold, stoopid-fresh style sheets he leaves behind. All his mad-phat nollidge will soon be published by O'Reilly and Associates in the Strictly Non-Fiction book XSLT (ISBN 0596000537, pre-order your copy today at amazon.com) which will then start slayin' soft-sellin' suckas at tha local booksella. Discussing the book in a recent dW interview, he boasted, "I'm gonna empty mah dome into one supa-fly tome."
For relaxation, he likes to put his hands up in the air, and in his words, "wave 'em around like I just don't care." When not chillin' with his worldwide XML krew, he maxes at the crib in Raleigh with his wife, cooking teacher CT-ONE, and their six-year-old shortie, Lily the Flayva Princess. You can send him a shout-out at dtidwell@us.ibm.com.
Domain Name Protection, Email Marketing, and IP Addressing
Steps to avoid having email domains blocked:
- Consider using a service like Constant Contact (www.constantcontact.com) to send out your newsletters. This will help you ensure that your emails are sent out safely and that you do not end up getting blocked.
- Refrain from sending large images, attachments or creating messages that are composed solely of an image(s).
- When employing tracking pixels (Web bugs or beacons), clearly state their presence in your public privacy or P3P policies.
- Practice due diligence by being aware of the age of your email lists and refraining from sending to inactive accounts.
To find more information and useful tips on email best practices, go to:
Network address range
|
Default mask
|
10.0.0.0 - 10.255.255.255
|
255.0.0.0
|
172.16.0.0 - 172.31.255.255
|
255.240.0.0
|
192.168.0.0 - 192.168.255.255
|
255.255.0.0
|
IP Classes
IP Address Classifications, IP Classes
Network address range
|
Default mask
|
10.0.0.0 - 10.255.255.255
|
255.0.0.0
|
172.16.0.0 - 172.31.255.255
|
255.240.0.0
|
192.168.0.0 - 192.168.255.255
|
255.255.0.0
|
IP Subnetting
Kindle
Donald Westlake, James Ellroy, and Dorothy Parker
Alt-Shift-G is the keystroke to take a screenshot on the Kindle2
.kindle, Keystroke, Shortcut, Keyboard
Mac OS X
For the quick thing (like in pre 2000 Pro systems), press 'cmd option esc'. For the full thing (like in 2000 and XP), go to Apps:Utils:Activity Monitor
Command-Shift-3
|
Take a picture of the screen
|
Command-Shift-4
|
Take a picture of the selection
|
Command-Shift-4, then press Control while selecting
|
Take a picture of the screen, place in Clipboard
|
Command-Shift-4, then Spacebar
|
Take a picture of the selected window
|
Option-Command-esc
|
Force Quit
|
Control-Eject
|
Restart, Sleep, Shutdown dialog box
|
Control-Command-Eject
|
Quit all applications and restart
|
Option-Command-Eject or
Option-Command-Power
|
Sleep
|
. ./.profile
echo $PATH
Mac, OS X, Unix
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