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I am looking for a list of the valid characters which can be used in a user account password on Ubuntu. man passwd just tells me:

As a general guideline, passwords should consist of 6 to 8 characters including one or more characters from each of the following sets:

   ·   lower case alphabetics

   ·   digits 0 thru 9

   ·   punctuation marks

Which is not helping much.

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1 Answer

Passwords allows the following:

  • Lowercase Alphabetical (a, b, c, etc.)
  • Uppercase Alphabetical (A, B, C, etc.)
  • Numerics (0, 1, 2, etc.)
  • Special Characters (@, %, !, etc.)

for more details have a look https://help.ubuntu.com/community/StrongPasswords

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This doesn't tell me anything I don't already know.. I want a list of all allowed characters. –  wim Feb 2 '12 at 7:32
    
    
Are you trying to say that ANY special character is allowed ? –  wim Feb 2 '12 at 7:54
    
yes ...in my opinion don't use extra special special character –  One Zero Feb 2 '12 at 8:06
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