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Thread: Share your knowledge about UNIX permission

  1. #1
    Contributing Member
    Join Date
    May 2006
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    82

    Share your knowledge about UNIX permission

    I want to know what are the permissions available in UNIX for achieving security? It would be nice if someone could share their thoughts about the UNIX permission usage in other words what level of access if provided to whom for security and how they are provided.


  2. #2
    Contributing Member
    Join Date
    May 2006
    Answers
    71

    Re: Share your knowledge about UNIX permission

    I think you can achieve the same by using chmod a command available in UNIX. But there is lot of permission commands available in UNIX which I am not aware. Hope to get it the knowledge in this discussion. All the above UNIX is a system designed for getting higher security.


  3. #3
    Junior Member
    Join Date
    Mar 2007
    Answers
    2

    Re: Share your knowledge about UNIX permission

    Basically there are three types permission you can set on a file "read", "write" and "execute". These file permission can be changed with the help of command "chmod"
    Ex: drwxrwxrwx 8 bin bin 8192 Mar 7 19:50 tmp

    r=read=4
    w=write=2
    x=excecute=1

    in the above example the first "d" say's tmp is a directory file and after that there are three set of "rwx" in which the first set is for user, the second one is for group and the third is one for others.

    permission on a file can be changed by

    $ chmod 644 <filename>
    6=read and write permission on the file to users
    4=only read permission on the file to group
    4=only read permission on the file to others.

    for more information use "man"
    $man chmod


  4. #4
    Junior Member
    Join Date
    Jan 2007
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    9

    Re: Share your knowledge about UNIX permission

    chown and chgrp are two more of that kind.


  5. #5
    Junior Member
    Join Date
    Feb 2009
    Answers
    2

    Re: Share your knowledge about UNIX permission

    athor type chmod


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