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Linux system password cracking

Source: Internet
Author: User
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Linux system password cracking-general Linux technology-Linux technology and application information. For details, refer to the following section. How to obtain the Linux Password File
The password file format is public.
Password File passwd. If the password is moved to shadow, no password information is available.
Some tools can obtain copies of shadow files.

Program cracking
Crack-password guessing
John the Ripper-dictionary attacks can also be exploited.
XIT-dictionary attack, DOS program
......

Countermeasure
Use shadow, MD5
Use strong passwords
The account is locked after multiple failures
Combined with other authentication technologies
Log records

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