How to backup an Imac 24'inch into a external HD using the prompt

Hi,

I have an Imac 24 ich, 1GB ram, 256 GB space. I can''t see anything because the screen gone Pink and green. I cannot see anythins on the screen that why i would like to ask you HOW DO I AFTER PRESS APPLE + S IT TAKES ME TO A PROMPT WHERE WE CAN DO MANY THINGS BUT I AM NOT SURE IF IS LINUX. BY USING THIS PROMPT " WHAT IS THE COMMAND TO COPY THE INTERNAL PROFILES OR ALL DATA FROM THE HARD DISK TO AN EXTERNAL DISK? ( THE REASON OF THAT IS BECAUSE I CANNOT SEE NOTHING ON THE SCREEM, CAN YOU HELP?

EDUARDO.
emilhomemAsked:
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Aaron TomoskySD-WAN SimplifiedCommented:
You can plugin an external monitor using the minidisplayport plug. I use a mdp->dvi adapter to add a second monitor to many iMacs.
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emilhomemAuthor Commented:
I don't have this adapter and would like to backup using the prompt " root #" . Do you know how can i backup?
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Aaron TomoskySD-WAN SimplifiedCommented:
I think dd is the way to go. You may have to guess the disk numbers since you have no screen...
dd bs=512 if=/dev/rdisk0 of=/volumes/Nameofexternaldrive/internaldrive.dmg conv=noerror,sync

Rdisk0 is the internal drive. This will make one giant DMG file you can mount on another Mac. If you want to just clone the drive:
dd if=/dev/sda of=/dev/sdb

Feel free to read up on dd commands:
http://serverfault.com/questions/4906/using-dd-for-disk-cloning
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strungCommented:
What are you trying to back up to? Do you have a second Mac? If so, you have a couple of choices. You can control the 24" remotely using screen sharing, or you can hookup the 24" to another Mac using a firewire cable and use Firewire Target Disk Mode to retrieve your data:

http://support.apple.com/kb/ht1661
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Aaron TomoskySD-WAN SimplifiedCommented:
"WHAT IS THE COMMAND TO COPY THE INTERNAL PROFILES OR ALL DATA FROM THE HARD DISK TO AN EXTERNAL DISK? "

He os trying to copy the harddrive to an external harddrive it sounds like
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emilhomemAuthor Commented:
excellent!
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strungCommented:
So, what exactly worked?
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emilhomemAuthor Commented:
It works with your advice by using a Firewire cable.

It was perfect.
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