Web Reference: Jul 23, 2025 · The exec command in Linux allows you to permanently redirect standard output (stdout) and standard error (stderr) for an entire script or session. Unlike temporary redirections (> or >>), exec applies redirection to all subsequent commands within the script. When you run a Linux command, there are three data stream that play a part in it: 1. Standard input (stdin) is the source of input data. By default, stdin is any text entered from the keyboard. It’s stream ID is 0. 2. Standard output (stdout) is the outcome of command. By default, it is displayed on the screen. It’s stream ID is 1. 3. Standard erro... Apr 13, 2025 · In this article, I will simplify what standard input, output, and error actually are, how to use simple redirection operators like >, >>, and < to control information flow, and how to handle...
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