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  2. PostgreSQL - Wikipedia

    en.wikipedia.org/wiki/PostgreSQL

    The primary front-end for PostgreSQL is the psql command-line program, which can be used to enter SQL queries directly, or execute them from a file. In addition, psql provides a number of meta-commands and various shell-like features to facilitate writing scripts and automating a wide variety of tasks; for example tab completion of object names ...

  3. List of POSIX commands - Wikipedia

    en.wikipedia.org/wiki/List_of_POSIX_commands

    Cut out selected fields of each line of a file System III cxref: C programming Optional (XSI) Generate a C-language program cross-reference table System V date: Misc Mandatory Display the date and time Version 1 AT&T UNIX dd: Filesystem Mandatory Convert and copy a file Version 5 AT&T UNIX delta: SCCS Optional (XSI) Make a delta (change) to an ...

  4. sync (Unix) - Wikipedia

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

    PostgreSQL for example may use a variety of different sync calls, including fsync() and fdatasync(), [5] in order for commits to be durable. [6] Unfortunately, for any single client writing a series of records, a rotating hard drive can only commit once per rotation, which makes for at best a few hundred such commits per second. [ 7 ]

  5. kill (command) - Wikipedia

    en.wikipedia.org/wiki/Kill_(command)

    The taskkill command on Microsoft Windows. In Microsoft's command-line interpreter Windows PowerShell, kill is a predefined command alias for the Stop-Process cmdlet. Microsoft Windows XP, Vista and 7 include the command taskkill [5] to terminate processes. The usual syntax for this command is taskkill /im "IMAGENAME".

  6. Signal (IPC) - Wikipedia

    en.wikipedia.org/wiki/Signal_(IPC)

    To speed the computer shutdown procedure, Mac OS X 10.6, aka Snow Leopard, will send SIGKILL to applications that have marked themselves "clean" resulting in faster shutdown times with, presumably, no ill effects. [17] The command killall -9 has a similar, while dangerous effect, when executed e.g. in Linux; it does not let programs save ...

  7. PL/pgSQL - Wikipedia

    en.wikipedia.org/wiki/PL/pgSQL

    PL/pgSQL (Procedural Language/PostgreSQL) is a procedural programming language supported by the PostgreSQL ORDBMS. It closely resembles Oracle 's PL/SQL language. Implemented by Jan Wieck, PL/pgSQL first appeared with PostgreSQL 6.4, released on October 30, 1998. [ 1 ]

  8. Shutdown (computing) - Wikipedia

    en.wikipedia.org/wiki/Shutdown_(computing)

    In Unix and Linux, the shutdown command can be used to turn off or reboot a computer. Only the superuser or a user with special privileges can shut the system down. One commonly issued form of this command is shutdown -h now, which will shut down a system immediately. Another one is shutdown -r now to reboot.

  9. Command-line interface - Wikipedia

    en.wikipedia.org/wiki/Command-line_interface

    An MS-DOS command line, illustrating parsing into command and arguments. A command-line argument or parameter is an item of information provided to a program when it is started. [23] A program can have many command-line arguments that identify sources or destinations of information, or that alter the operation of the program.