How to redirect stdin and stdout and stderr at the same time in bash?

Question

I want to redirect stdin and stdout and stderr at the same time in bash, is this how it's done:

someProgram < stdinFile.txt > stdoutFile.txt 2> stderrFile.txt

@roaima I edited my question. – user258258 Oct 31 '17 at 07:40 — user258258, Oct 31 '17 at 07:40

score 1 · Accepted Answer · answered Oct 31 '17 at 07:42

Yes, your syntax is correct although the following equivalent one is closer to what the shell actually does:

< stdinFile.txt > stdoutFile.txt 2> stderrFile.txt command arguments

The files used for redirection are open before the command is launched, and if there is a failure in this first step, the command is not launched.

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