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  2. File-system permissions - Wikipedia

    en.wikipedia.org/wiki/File-system_permissions

    Most file systems include attributes of files and directories that control the ability of users to read, change, navigate, and execute the contents of the file system. In some cases, menu options or functions may be made visible or hidden depending on a user's permission level; this kind of user interface is referred to as permission-driven.

  3. chmod - Wikipedia

    en.wikipedia.org/wiki/Chmod

    sets read, write, and execute permissions for user, and sets read permission for Group and Others: chmod 1755 findReslts.sh: Sets sticky bit (this suggests that the script be retained in memory), sets read, write, and execute permissions for owner, and sets read and execute permissions for group and others chmod 4755 setCtrls.sh

  4. umask - Wikipedia

    en.wikipedia.org/wiki/Umask

    allow read, write, and execute permission for the file's owner, but prohibit read, write, and execute permission for everyone else umask 113 allow read or write permission to be enabled for the owner and the group, but not execute permission; allow read permission to be enabled for others, but not write or execute permission

  5. Access-control list - Wikipedia

    en.wikipedia.org/wiki/Access-control_list

    Each accessible object contains an identifier to its ACL. The privileges or permissions determine specific access rights, such as whether a user can read from, write to, or execute an object. In some implementations, an ACE can control whether or not a user, or group of users, may alter the ACL on an object.

  6. Create, read, update and delete - Wikipedia

    en.wikipedia.org/wiki/Create,_read,_update_and...

    In computer programming, create, read, update, and delete (CRUD) are the four basic operations (actions) of persistent storage. [1] CRUD is also sometimes used to describe user interface conventions that facilitate viewing, searching, and changing information using computer-based forms and reports .

  7. Discretionary access control - Wikipedia

    en.wikipedia.org/wiki/Discretionary_access_control

    Users (owners) have under this DAC implementation the ability to make policy decisions and/or assign security attributes. A straightforward example is the Unix file mode which represent write, read, and execute in each of the 3 bits for each of User, Group and Others. (It is prepended by another bit that indicates additional characteristics).

  8. setuid - Wikipedia

    en.wikipedia.org/wiki/Setuid

    The setuid and setgid bits are normally represented as the values 4 for setuid and 2 for setgid in the high-order octal digit of the file mode. For example, 6711 has both the setuid and setgid bits (4 + 2 = 6) set, and also the file read/write/executable for the owner (7), and executable by the group (first 1) and others (second 1).

  9. NX bit - Wikipedia

    en.wikipedia.org/wiki/NX_bit

    The SPARC Reference MMU for Sun SPARC version 8 has permission values of Read Only, Read/Write, Read/Execute, and Read/Write/Execute in page table entries, [6] although not all SPARC processors have a SPARC Reference MMU. A SPARC version 9 MMU may provide, but is not required to provide, any combination of read/write/execute permissions. [7]