mask and umask in *Nix operating systems

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I know that a set of permissions for a given file is usually represented by a bit stream of machine code (a bit field) and a Bitwise Operation is the name for several operations on one or more bit patterns of a given bit field.



What are a mask and umask, in regarding to that?






shell permissions security 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
    5 hours ago










  • umask is both a command and an option in fstab . Take a look at the arch page I gave you
    – Panther
    4 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
    2 hours ago














up vote
-2
down vote

favorite












I know that a set of permissions for a given file is usually represented by a bit stream of machine code (a bit field) and a Bitwise Operation is the name for several operations on one or more bit patterns of a given bit field.



What are a mask and umask, in regarding to that?






shell permissions security 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
    5 hours ago










  • umask is both a command and an option in fstab . Take a look at the arch page I gave you
    – Panther
    4 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
    2 hours ago












up vote
-2
down vote

favorite









up vote
-2
down vote

favorite











I know that a set of permissions for a given file is usually represented by a bit stream of machine code (a bit field) and a Bitwise Operation is the name for several operations on one or more bit patterns of a given bit field.



What are a mask and umask, in regarding to that?






shell permissions security umask







share|improve this question















I know that a set of permissions for a given file is usually represented by a bit stream of machine code (a bit field) and a Bitwise Operation is the name for several operations on one or more bit patterns of a given bit field.



What are a mask and umask, in regarding to that?






shell permissions security umask




shell permissions security umask






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 10 mins ago

























asked 5 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
    5 hours ago










  • umask is both a command and an option in fstab . Take a look at the arch page I gave you
    – Panther
    4 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
    2 hours ago












  • 2




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










  • umask is both a command and an option in fstab . Take a look at the arch page I gave you
    – Panther
    4 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
    2 hours ago







2




2




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




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












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




umask is both a command and an option in fstab . Take a look at the arch page I gave you
– Panther
4 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
2 hours ago




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















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