Close Menu
    Facebook X (Twitter) Instagram
    Command Linux
    • About
    • How to
      • Q&A
    • OS
      • Windows
      • Arch Linux
    • AI
    • Gaming
      • Easter Eggs
    • Statistics
    • Blog
      • Featured
    • MORE
      • IP Address
      • Man Pages
    • Write For Us
    • Contact
    Command Linux
    Home - man page - UNIMPLEMENTED

    UNIMPLEMENTED

    WillieBy WillieFebruary 5, 2026Updated:February 5, 2026No Comments1 Min Read

    NAME

    afs_syscall, break, fattach, fdetach, ftime, getmsg, getpmsg, gtty, isastream, lock, madvise1, mpx, prof, profil, putmsg, putpmsg, security, stty, tuxcall, ulimit, vserver – unimplemented system calls  

    SYNOPSIS

    Unimplemented system calls.  

    DESCRIPTION

    These system calls are not implemented in the Linux kernel.  

    RETURN VALUE

    These system calls always return -1 and set errno to ENOSYS.  

    NOTES

    Note that ftime(3), profil(3), and ulimit(3) are implemented as library functions.

    Some system calls, like alloc_hugepages(2), free_hugepages(2), ioperm(2), iopl(2), and vm86(2) exist only on certain architectures.

    Some system calls, like ipc(2), create_module(2), init_module(2), and delete_module(2) exist only when the Linux kernel was built with support for them.

    COLOPHON

    This page is part of release 3.74 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.

    Willie
    • Website

    Willie has over 15 years of experience in Linux system administration and DevOps. After managing infrastructure for startups and enterprises alike, he founded Command Linux to share the practical knowledge he wished he had when starting out. He oversees content strategy and contributes guides on server management, automation, and security.

    Related Posts

    PSTREE

    April 20, 2026

    SIGSUSPEND

    April 20, 2026

    SETFACL

    April 20, 2026

    SYSTEMD-SYSCTL.SERVICE

    April 20, 2026
    Top Posts

    directfb-config

    March 24, 2026

    Arch Based Distros You Should Try in 2026

    March 19, 2026

    Milohacherry Coin The Digital Rewards Through Active Living

    January 30, 2026

    How to Verify, Activate, or Turn Off Secure Boot on Linux

    March 5, 2026
    • Home
    • Contact Us
    • Privacy Policy
    • Terms of Use

    Type above and press Enter to search. Press Esc to cancel.