How to Hack Windows, Mac and Linux User Passwords
![3238029478_aa1df44c98[1]](http://hacknmod.com/wp-content/uploads/2009/09/3238029478_aa1df44c981.jpg "3238029478_aa1df44c98[1]")
Password cracking seems like a difficult task but these techniques make it as simple. We’ll show you some software which cracks windows, mac, and linux user account passwords in a just a few minutes.  The programs basically do all the hard work for you as noted in this tutorial.
Breaking into a computer is an illegal activity but it does help to know how to re-access your own equipment. So, this post is for informational and ethical purposes only! This how-to covers three OS we use and the methods to crack the log-in passwords.
Windows
For Windows OS, Ophcrack is the tool of choice. It is a free Windows Password cracker based on Rainbow Tables. It has a GUI which makes it easier to run. The software can decipher passwords up to 14 characters in length in a quick 10 seconds.
To use Ophcrack one needs to download the Ophcrack ISO and burn it to a CD (or load it via a USB drive). Run the CD by loading it in the tray and restarting the computer with the power switch. Switch to the BIOS options and set the computer to boot from the CD Drive. The computer boots up and reads the Ophcrack CD which then proceeds to break the password. Use this password to log into the machine.
Ophcrack is a multi-platform software and so can be used for Mac and Linux too.
![3237188885_1527db4c72_m[1]](http://hacknmod.com/wp-content/uploads/2009/09/3237188885_1527db4c72_m1.jpg "3237188885_1527db4c72_m[1]")
Mac OS X
Apart from Ophcrack, another simple method involves using the Mac OS X installation CD (for v10.4). Insert and reboot to display UTILITIES. Choose RESET PASSWORD to get a new one. Login using this password. To reset the password in Mac OS X 10.5, reboot the computer and press COMMAND + S.
At the prompt type in:
sck -fy
mount -uw /
launchctl load /System/Library/LaunchDaemons/com.apple.DirectoryServices.plist
dscl . -passwd /Users/UserName newpassword
Login with the new reset password.
Linux
Power on the computer, press the ESC key and on the boot loader (GRUB) screen select the ‘Recovery Mode’. Press the ‘B’ Key to enter the single user mode. At the default prompt, type in ‘passwd’ and key in your new password. For access to a single account on the system type ‘passwd username’ replacing ‘username’ with the login name for the account you would reset the password for.
A lesson in cracking is also a lesson in security. Joe Tech’s article advocates the use of encryption (Blowfish or AES-128) as a failsafe against password breach.
Is ethical hacking for you? Check out these HacknMod tutorials:
October 7th, 2009
Yeah its good to have these tools but sometimes when we come across ant crash or partition table corruption then we need a good recovery tool as well like Stellar Phoenix Partition Recovery software which is quite easy and efficient in recovering all kinds of windows data from FAT and NTFS file systems..
http://www.partitionrecovery-software.com
October 13th, 2009
Linux: Grub can be password protected, and booting into single user mode can also be password protected (default in some distros). If the BIOS is also password protected and you don’t have complete physical access to the machine (to clear CMOS and thus reset the BIOS to factory defaults), you can’t beat Linux
November 18th, 2009
so if you don’t want your pc to get manual hacked make sure to put atleast a password to your bios.
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http://classictutorials.com
January 27th, 2010
What if the computer is on a network and you are looking for the admin password while there about 3000 other usernames and passwords. any advice here?
January 28th, 2010
Hmmm…then your job just got 3,000 times harder
. I’m not sure how you would do that.
February 28th, 2010
FYI, for mac using the single-user mode (Apple+S), you must type “fsck -fy” not “sck -fy”.
March 3rd, 2010
How do i open this iso file?
March 3rd, 2010
Download a program called power iso