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In computing, redirection is a form of interprocess communication, and is a function common to most command-line interpreters, including the various Unix shells that can redirect standard streams to user-specified locations. The concept of redirection is quite old, dating back to the earliest operating systems (OS).
A laptop with an HP USB Multiseat adapter, running Linux. A multiseat, multi-station or multiterminal system is a single computer which supports multiple independent local users at the same time. A multi-seat assembly encompassing four "seats", running Linux. A two-seat system using Windows Multipoint Server.
#!/usr/bin/env python import sys # Save the current stdout so that we can revert sys.stdout # after we complete our redirection stdin_fileno = sys. stdin stdout_fileno = sys. stdout # Redirect sys.stdout to the file sys. stdout = open ("myfile.txt", "w") ctr = 0 for inps in stdin_fileno: ctrs = str (ctr) # Prints to the redirected stdout sys ...
Yes (stdin, stdout, stderr, stdout+stderr) Yes (via 4DOS.INI / NDOS.INI file, startup parameters, environment variables, SETDOS command) Yes (automatic \AUTOEXEC.BAT for primary shell and 4START.BTM / 4START.BAT as well as 4EXIT.BTM / 4EXIT.BAT for any shell, or explicitly via /P , /P:dir\filename.ext or /K startup options)
The Linux tee command was written by Mike Parker, Richard Stallman, and David MacKenzie. [5] 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. [6] The FreeDOS version was developed by Jim Hall and is licensed under the GPL. [7]
>> file means stdout will be appended at the end of file. >>& file means both stdout and stderr will be appended at the end of file. < file means stdin will be read from file. << string is a here document. Stdin will read the following lines up to the one that matches string. Redirecting stderr alone isn't possible without the aid of a sub-shell.
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In computing, Bash (Bourne Again Shell) [7] is a Unix shell and command language first developed for the GNU Project [8] by Brian Fox, supported by the Free Software Foundation. [9] [10] Designed as a 100% [11] free software alternative for the Bourne shell, [12] [13] [14] it was initially released in 1989. [15]