^ sleep(1) – FreeBSD General Commands Manual.^ sleep – Shell and Utilities Reference, The Single UNIX Specification, Version 4 from The Open Group.The sleep command has also been ported to the IBM i operating system. The command is available as a separate package for Microsoft Windows as part of the UnxUtils collection of native Win32 ports of common GNU Unix-like utilities. Another native version is the timeout command which is part of current versions of Windows. Microsoft also provides a sleep resource kit tool for Windows which can be used in batch files or the command prompt to pause the execution and wait for some time. In PowerShell, sleep is a predefined command alias for the Start-Sleep cmdlet which serves the same purpose. Ī sleep command is also part of ASCII's MSX-DOS2 Tools for MSX-DOS version 2. The FreeDOS version was developed by Trane Francks and is licensed under the GPL. The command is also available in the OS-9 shell, in the KolibriOS Shell, and part of the FreeDOS Package group Utilities. The version of sleep bundled in GNU coreutils was written by Jim Meyering and Paul Eggert. It was inherited into the first version of POSIX and the Single Unix Specification. Sleep for Unix-like systems is part of the X/Open Portability Guide since issue 2 of 1987. The sleep instruction suspends the calling process for at least the specified number of seconds (the default), minutes, hours or days. In computing, sleep is a command in Unix, Unix-like and other operating systems that suspends program execution for a specified time. Unix, Unix-like, V, Plan 9, Inferno, OS-9, MSX-DOS, FreeDOS, Windows, KolibriOS, IBM i AT&T Bell Laboratories, Microsoft, Microware, Trane Francks
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