Lock list of users in /etc/passwd via script












0















Lets say I have a list of users in a file somewhere:



mark
billy
sam


Here are the entries in /etc/passwd:



mark:x:1001:1001:,,,:/home/mark:/bin/bash
billy:x:1002:1002:,,,:/home/sam:/bin/bash
sam:x:1002:1003:,,,:/home/billy:/bin/csh


I want to change all of these entries to /bin/nologon



Context: I was given a list of users and need to lock the accounts. I'm not allowed to use the typical usermod or passwd command. Only use a script by finding the users and replacing. Here's what I got so far but I'm lost.



#!/bin/bash
User="$(cat /home/billy/file)"
User2="$(cat /etc/passwd | cut -d: -f1)"
for i in $User
do "some sed command?"


It's hard because some users use bash and others use csh.









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    0















    Lets say I have a list of users in a file somewhere:



    mark
    billy
    sam


    Here are the entries in /etc/passwd:



    mark:x:1001:1001:,,,:/home/mark:/bin/bash
    billy:x:1002:1002:,,,:/home/sam:/bin/bash
    sam:x:1002:1003:,,,:/home/billy:/bin/csh


    I want to change all of these entries to /bin/nologon



    Context: I was given a list of users and need to lock the accounts. I'm not allowed to use the typical usermod or passwd command. Only use a script by finding the users and replacing. Here's what I got so far but I'm lost.



    #!/bin/bash
    User="$(cat /home/billy/file)"
    User2="$(cat /etc/passwd | cut -d: -f1)"
    for i in $User
    do "some sed command?"


    It's hard because some users use bash and others use csh.









    share







    New contributor




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























      0












      0








      0








      Lets say I have a list of users in a file somewhere:



      mark
      billy
      sam


      Here are the entries in /etc/passwd:



      mark:x:1001:1001:,,,:/home/mark:/bin/bash
      billy:x:1002:1002:,,,:/home/sam:/bin/bash
      sam:x:1002:1003:,,,:/home/billy:/bin/csh


      I want to change all of these entries to /bin/nologon



      Context: I was given a list of users and need to lock the accounts. I'm not allowed to use the typical usermod or passwd command. Only use a script by finding the users and replacing. Here's what I got so far but I'm lost.



      #!/bin/bash
      User="$(cat /home/billy/file)"
      User2="$(cat /etc/passwd | cut -d: -f1)"
      for i in $User
      do "some sed command?"


      It's hard because some users use bash and others use csh.









      share







      New contributor




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












      Lets say I have a list of users in a file somewhere:



      mark
      billy
      sam


      Here are the entries in /etc/passwd:



      mark:x:1001:1001:,,,:/home/mark:/bin/bash
      billy:x:1002:1002:,,,:/home/sam:/bin/bash
      sam:x:1002:1003:,,,:/home/billy:/bin/csh


      I want to change all of these entries to /bin/nologon



      Context: I was given a list of users and need to lock the accounts. I'm not allowed to use the typical usermod or passwd command. Only use a script by finding the users and replacing. Here's what I got so far but I'm lost.



      #!/bin/bash
      User="$(cat /home/billy/file)"
      User2="$(cat /etc/passwd | cut -d: -f1)"
      for i in $User
      do "some sed command?"


      It's hard because some users use bash and others use csh.







      linux scripting passwd nologin





      share







      New contributor




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










      share







      New contributor




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








      share



      share






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      WallHax is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      asked 1 min ago









      WallHaxWallHax

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      New contributor




      WallHax is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      New contributor





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






      WallHax 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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