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Update 'posix_shell.md'

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Jan Danielzick 2022-09-24 17:18:47 +00:00
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@ -61,8 +61,9 @@ the standard output/error streams.
- `COMMAND > FILE` redirects stdout of COMMAND into FILE. - `COMMAND > FILE` redirects stdout of COMMAND into FILE.
- `COMMAND 2>FILE` redirects stderr into FILE. - `COMMAND 2>FILE` redirects stderr into FILE.
- `COMMAND 2>&1` redirects stderr into stdout. - `COMMAND 2>&1` redirects stderr into stdout.
- `COMMAND < FILE` puts the contents of FILE into stdin.
You can have multiple redirects per command though more than two usually don’t make sense. You can have multiple redirects per command though more than three usually don’t make sense.
The most common example of this is redirecting stderr to stdout and The most common example of this is redirecting stderr to stdout and
the combined stdout into a file like so: `COMMAND > FILE 2>&1`. the combined stdout into a file like so: `COMMAND > FILE 2>&1`.