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  2. Print Screen - Wikipedia

    en.wikipedia.org/wiki/Print_Screen

    A 104-key PC US English keyboard layout with Print Scrn circled. Print Screen (often abbreviated Print Scrn, Prnt Scrn, Prnt Scr, Prt Scrn, Prt Scn, Prt Scr, Prt Sc, Pr Sc, or PS) is a key present on most PC keyboards. It is typically situated in the same section as the break key and scroll lock key. The print screen may share the same key as ...

  3. Load-link/store-conditional - Wikipedia

    en.wikipedia.org/wiki/Load-link/store-conditional

    Real implementations of LL/SC do not always succeed even if there are no concurrent updates to the memory location in question. Any exceptional events between the two operations, such as a context switch , another load-link, or even (on many platforms) another load or store operation, will cause the store-conditional to spuriously fail.

  4. List of POSIX commands - Wikipedia

    en.wikipedia.org/wiki/List_of_POSIX_commands

    Print a calendar Version 5 AT&T UNIX cat: Filesystem Mandatory Concatenate and print files PDP-7 UNIX cd: Filesystem Mandatory Change the working directory Version 6 AT&T UNIX cflow: C programming Optional (XSI) Generate a C-language call graph: System V chgrp: Filesystem Mandatory Change the file group ownership PWB UNIX chmod: Filesystem ...

  5. pwd - Wikipedia

    en.wikipedia.org/wiki/Pwd

    Multics had a pwd command (which was a short name of the print_wdir command) [11] from which the Unix pwd command originated. [12] The command is a shell builtin in most Unix shells such as Bourne shell, ash, bash, ksh, and zsh. It can be implemented easily with the POSIX C functions getcwd() or getwd().

  6. Magic SysRq key - Wikipedia

    en.wikipedia.org/wiki/Magic_SysRq_key

    It is often used to recover from freezes, or to reboot a computer without corrupting the filesystem. [1] Its effect is similar to the computer's hardware reset button (or power switch) but with many more options and much more control. This key combination provides access to features for disaster recovery.

  7. System request - Wikipedia

    en.wikipedia.org/wiki/System_request

    A 104-key PC US English keyboard layout with System request circled. System Request (SysRq or Sys Req) is a key on personal computer keyboards that has no standard use. Introduced by IBM with the PC/AT, it was intended to be available as a special key to directly invoke low-level operating system functions with no possibility of conflicting with any existing software.

  8. List of Linux distributions - Wikipedia

    en.wikipedia.org/wiki/List_of_Linux_distributions

    This is an accepted version of this page This is the latest accepted revision, reviewed on 25 January 2025. List of software distributions using the Linux kernel This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages) This article relies excessively on references to primary sources. Please improve this ...

  9. Free and open-source software - Wikipedia

    en.wikipedia.org/wiki/Free_and_open-source_software

    "Free and open-source software" (FOSS) is an umbrella term for software that is considered free software and/or open-source software. [1] The precise definition of the terms "free software" and "open-source software" applies them to any software distributed under terms that allow users to use, modify, and redistribute said software in any manner they see fit, without requiring that they pay ...