mask vs umask in *Nix operating systems

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I understand the following:



  • A set of permissions for a given file is usually represented by a bit stream of machine code (a bit field).


  • A Bitwise operation is the name for several operations on one or more bit patterns of a given bit field.


  • A mask is any data executed in any bitwise operation.


How those a mask differs from a umask?










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  • 2




    In what co text, file creation? Fstab ? Please see wiki.archlinux.org/index.php/umask and update your question
    – Panther
    3 hours ago










  • Sadly I totally misunderstood the comment. I hope you'd consider rephrasing it,
    – JohnDoea
    3 hours ago











  • umask is both a command and an option in fstab . Take a look at the arch page I gave you
    – Panther
    3 hours ago






  • 2




    umask, utime, and ulimit were added in USG UNIX and then other UNIXes adopted them. u probably stands for user.
    – Mark Plotnick
    1 hour ago














up vote
-2
down vote

favorite












I understand the following:



  • A set of permissions for a given file is usually represented by a bit stream of machine code (a bit field).


  • A Bitwise operation is the name for several operations on one or more bit patterns of a given bit field.


  • A mask is any data executed in any bitwise operation.


How those a mask differs from a umask?










share|improve this question



















  • 2




    In what co text, file creation? Fstab ? Please see wiki.archlinux.org/index.php/umask and update your question
    – Panther
    3 hours ago










  • Sadly I totally misunderstood the comment. I hope you'd consider rephrasing it,
    – JohnDoea
    3 hours ago











  • umask is both a command and an option in fstab . Take a look at the arch page I gave you
    – Panther
    3 hours ago






  • 2




    umask, utime, and ulimit were added in USG UNIX and then other UNIXes adopted them. u probably stands for user.
    – Mark Plotnick
    1 hour ago












up vote
-2
down vote

favorite









up vote
-2
down vote

favorite











I understand the following:



  • A set of permissions for a given file is usually represented by a bit stream of machine code (a bit field).


  • A Bitwise operation is the name for several operations on one or more bit patterns of a given bit field.


  • A mask is any data executed in any bitwise operation.


How those a mask differs from a umask?










share|improve this question















I understand the following:



  • A set of permissions for a given file is usually represented by a bit stream of machine code (a bit field).


  • A Bitwise operation is the name for several operations on one or more bit patterns of a given bit field.


  • A mask is any data executed in any bitwise operation.


How those a mask differs from a umask?







shell permissions security umask






share|improve this question















share|improve this question













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edited 15 mins ago

























asked 3 hours ago









JohnDoea

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  • 2




    In what co text, file creation? Fstab ? Please see wiki.archlinux.org/index.php/umask and update your question
    – Panther
    3 hours ago










  • Sadly I totally misunderstood the comment. I hope you'd consider rephrasing it,
    – JohnDoea
    3 hours ago











  • umask is both a command and an option in fstab . Take a look at the arch page I gave you
    – Panther
    3 hours ago






  • 2




    umask, utime, and ulimit were added in USG UNIX and then other UNIXes adopted them. u probably stands for user.
    – Mark Plotnick
    1 hour ago












  • 2




    In what co text, file creation? Fstab ? Please see wiki.archlinux.org/index.php/umask and update your question
    – Panther
    3 hours ago










  • Sadly I totally misunderstood the comment. I hope you'd consider rephrasing it,
    – JohnDoea
    3 hours ago











  • umask is both a command and an option in fstab . Take a look at the arch page I gave you
    – Panther
    3 hours ago






  • 2




    umask, utime, and ulimit were added in USG UNIX and then other UNIXes adopted them. u probably stands for user.
    – Mark Plotnick
    1 hour ago







2




2




In what co text, file creation? Fstab ? Please see wiki.archlinux.org/index.php/umask and update your question
– Panther
3 hours ago




In what co text, file creation? Fstab ? Please see wiki.archlinux.org/index.php/umask and update your question
– Panther
3 hours ago












Sadly I totally misunderstood the comment. I hope you'd consider rephrasing it,
– JohnDoea
3 hours ago





Sadly I totally misunderstood the comment. I hope you'd consider rephrasing it,
– JohnDoea
3 hours ago













umask is both a command and an option in fstab . Take a look at the arch page I gave you
– Panther
3 hours ago




umask is both a command and an option in fstab . Take a look at the arch page I gave you
– Panther
3 hours ago




2




2




umask, utime, and ulimit were added in USG UNIX and then other UNIXes adopted them. u probably stands for user.
– Mark Plotnick
1 hour ago




umask, utime, and ulimit were added in USG UNIX and then other UNIXes adopted them. u probably stands for user.
– Mark Plotnick
1 hour ago















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