Examples of common applications in shell scripts

1. How can I redirect the standard output and error output to the same location at the same time?

There are two ways to achieve this:

Method One: 2>&1

# Ls/usr/share/doc > Out.file 2>&1

The implication is that if a file exists, the result is output to out.file,

Otherwise, the wrong prompt is output to out.file, which enables simultaneous redirection of standard output and error output

Method Two:&>

#ls/usr/share/doc &> Out.file

Explanation: Whether the correct output exists for a file, or the output of an error caused by the absence of a file, the result is redirected to the Out.file (either the correct output or the error output, redirected to Out.file)

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Examples of common applications in shell scripts