I/O redirection (was RE: Import question)

[Kenneth Brody]

Quoting Don Coleman (Thu, 23 Mar 2006 10:06:56 -0500):
[...]
> >     tr -d "\0" <file1.txt >file2.txt
[...]
> Ken, Wally, and others; thanks for the tip, after one question answered
> by Ken off-list it is working fine (processing a 3.5 MB file in about 1
> second).  One final question, what does the < do?

<filename

    Redirects the "standard input" to come from the specified file.

>filename

    Redirects the "standard output" to go to the specified file.

2>filename

    Redirects the "standard error" to go to the specified file.

tr -d "\0" <file1.txt >file2.txt

    Runs the command:

        tr -d "\0"

    redirecting stdin from "file1.txt" (rather than reading from
    the keyboard) and stdout to "file2.txt" (rather than displaying
    on the screen).

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