pam_unix Module Not Allowing Random String Passwords in Ubuntu 18.10












1














I just installed Ubuntuy 18.10 on one of my computers, and am trying to understand why a series of passwords are not working, even though they are completely random character strings.



I started by trying to change the initial password to the following character string: XB76cD_*P789_;Eqy10



I receive the following error and was prevented from using the password:




Try to avoid common words.




As far as I know, this string is not a common word in any language so I started to dig into it deeper to see why this password was not allowed.



The fresh installation is still using the default pam_unix module to validate changed passwords, so I looked in: /etc/pam.d/common-password , and did not see any rules that would make this password invalid.



I then started trying slight variations of the same password to dig a little deeper into why the random password was not allowed. I started to find slightly different variations of the password that were also not valid:




XB76cD_*P789_;Eqy12



X76cD_*P789_;Eqy12



[.] B76cD_*P789_;Eqy10




It seems as though there is a regular expression set somewhere that is preventing me from using a lot of passwords which should be valid. Does anyone have any idea as to what I should check next to be able to determine why these passwords are not valid?










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    1














    I just installed Ubuntuy 18.10 on one of my computers, and am trying to understand why a series of passwords are not working, even though they are completely random character strings.



    I started by trying to change the initial password to the following character string: XB76cD_*P789_;Eqy10



    I receive the following error and was prevented from using the password:




    Try to avoid common words.




    As far as I know, this string is not a common word in any language so I started to dig into it deeper to see why this password was not allowed.



    The fresh installation is still using the default pam_unix module to validate changed passwords, so I looked in: /etc/pam.d/common-password , and did not see any rules that would make this password invalid.



    I then started trying slight variations of the same password to dig a little deeper into why the random password was not allowed. I started to find slightly different variations of the password that were also not valid:




    XB76cD_*P789_;Eqy12



    X76cD_*P789_;Eqy12



    [.] B76cD_*P789_;Eqy10




    It seems as though there is a regular expression set somewhere that is preventing me from using a lot of passwords which should be valid. Does anyone have any idea as to what I should check next to be able to determine why these passwords are not valid?










    share|improve this question







    New contributor




    McWayWeb is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.























      1












      1








      1







      I just installed Ubuntuy 18.10 on one of my computers, and am trying to understand why a series of passwords are not working, even though they are completely random character strings.



      I started by trying to change the initial password to the following character string: XB76cD_*P789_;Eqy10



      I receive the following error and was prevented from using the password:




      Try to avoid common words.




      As far as I know, this string is not a common word in any language so I started to dig into it deeper to see why this password was not allowed.



      The fresh installation is still using the default pam_unix module to validate changed passwords, so I looked in: /etc/pam.d/common-password , and did not see any rules that would make this password invalid.



      I then started trying slight variations of the same password to dig a little deeper into why the random password was not allowed. I started to find slightly different variations of the password that were also not valid:




      XB76cD_*P789_;Eqy12



      X76cD_*P789_;Eqy12



      [.] B76cD_*P789_;Eqy10




      It seems as though there is a regular expression set somewhere that is preventing me from using a lot of passwords which should be valid. Does anyone have any idea as to what I should check next to be able to determine why these passwords are not valid?










      share|improve this question







      New contributor




      McWayWeb is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      I just installed Ubuntuy 18.10 on one of my computers, and am trying to understand why a series of passwords are not working, even though they are completely random character strings.



      I started by trying to change the initial password to the following character string: XB76cD_*P789_;Eqy10



      I receive the following error and was prevented from using the password:




      Try to avoid common words.




      As far as I know, this string is not a common word in any language so I started to dig into it deeper to see why this password was not allowed.



      The fresh installation is still using the default pam_unix module to validate changed passwords, so I looked in: /etc/pam.d/common-password , and did not see any rules that would make this password invalid.



      I then started trying slight variations of the same password to dig a little deeper into why the random password was not allowed. I started to find slightly different variations of the password that were also not valid:




      XB76cD_*P789_;Eqy12



      X76cD_*P789_;Eqy12



      [.] B76cD_*P789_;Eqy10




      It seems as though there is a regular expression set somewhere that is preventing me from using a lot of passwords which should be valid. Does anyone have any idea as to what I should check next to be able to determine why these passwords are not valid?







      linux password pam






      share|improve this question







      New contributor




      McWayWeb is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question







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      McWayWeb is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|improve this question




      share|improve this question






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      McWayWeb is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      asked 18 mins ago









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      McWayWeb is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






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