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  2. Comparison of operating system kernels - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_operating...

    Capsicum, MAC framework SYN cookies? ? ? ? Solaris Kernel Traditional Unix permissions, POSIX ACL, NFSv4 ACL: Default ? Solaris Trusted Extensions? ? ? ? ? ? ? ? ? Windows NT kernel Access control list: DEP: Yes Mandatory Integrity Control: AppContainers No Yes Windows Event Log Yes [15] Yes ? ? ? XNU Traditional Unix permissions, NT/NFSv4 ACL ...

  3. sbrk - Wikipedia

    en.wikipedia.org/wiki/Sbrk

    The brk and sbrk calls dynamically change the amount of space allocated for the heap segment of the calling process. The change is made by resetting the program break of the process, which determines the maximum space that can be allocated. The program break is the address of the first location beyond the current end of the data region.

  4. df (Unix) - Wikipedia

    en.wikipedia.org/wiki/Df_(Unix)

    The total size of the file system in 512-byte units. The exact meaning of this figure is implementation-defined, but should include <space used>, <space free>, plus any space reserved by the system not normally available to a user. <space used> The total amount of space allocated to existing files in the file system, in 512-byte units. <space free>

  5. du (Unix) - Wikipedia

    en.wikipedia.org/wiki/Du_(Unix)

    By default, the Single UNIX Specification (SUS) specifies that du is to display the file space allocated to each file and directory contained in the current directory. Links will be displayed as the size of the link file, not what is being linked to; the size of the content of directories is displayed, as expected.

  6. User space and kernel space - Wikipedia

    en.wikipedia.org/wiki/User_space_and_kernel_space

    The term user space (or userland) refers to all code that runs outside the operating system's kernel. [2] User space usually refers to the various programs and libraries that the operating system uses to interact with the kernel: software that performs input/output, manipulates file system objects, application software, etc.

  7. Comparison of file systems - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_file_systems

    MS-DOS 7.10 / Windows 95 OSR2 [b] QFS: ... No write support since Mac OS X 10.6 and no support at all since macOS 10.15 No ... Available cache space at time of write ...

  8. Memory paging - Wikipedia

    en.wikipedia.org/wiki/Memory_paging

    Windows can be configured to use free space on any available drives for page files. It is required, however, for the boot partition (i.e., the drive containing the Windows directory) to have a page file on it if the system is configured to write either kernel or full memory dumps after a Blue Screen of Death. Windows uses the paging file as ...

  9. Plan 9 from User Space - Wikipedia

    en.wikipedia.org/wiki/Plan_9_from_User_Space

    Plan 9 from User Space (also plan9port or p9p) is a port of many Plan 9 from Bell Labs libraries and applications to Unix-like operating systems. Currently it has been tested on a variety of operating systems , including Linux , macOS , FreeBSD , NetBSD , OpenBSD , Solaris and SunOS .