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Linux Shell Scripting Essentials by Sinny Kumari

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Redirecting the standard I/O and error streams

We have an option to redirect standard input, output, and errors, for example, to a file, another command, intended stream, and so on. Redirection is useful in different ways. For example, I have a bash script whose output and errors are displayed on a standard output—that is, terminal. We can avoid mixing an error and output by redirecting one of them or both to a file. Different operators are used for redirection. The following table shows some of operators used for redirection, along with its description:

Operator

Description

>

This redirects a standard output to a file

>>

This appends a standard output to a file

<

This redirects a standard input from a file

>&

This redirects a ...

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