Enable weak password in Ubuntu

本文揭示了在Linux系统中通过编辑/etc/pam.d/common-password文件,移除‘obscure’选项来增强密码强度检查的过程。删除此选项后,系统将不再对密码进行复杂性限制,从而降低弱密码被攻击的风险。

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WARNING: BAD PRACTICE!

Here we go.

Edit /etc/pam.d/common-password

find the line

password       [success=1 default=ignore]      pam_unix.so obscure sha512

The "obscure" option here disables simple password, according to the man page of pam_unix(8)

Enable some extra checks on password strength. ... The following checks are implemented:
...
Simple
Is the new password too simple? This is based on the length of
               the password and the number of different types of characters
               (alpha, numeric, etc.) used.

So, delete this "obscure" option and now you opened your box to the dumbest attack on the internet: weak password.

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