These are the various command operators that can be specified on the command
line. They allow redirection of input and output. Chaining multiple programs
together and conditional execution of programs.
<
Redirects input
>
Redirects output
>>
Appends redirected output to existing data
|
Pipes output
&& and ||
Processes commands conditionally
& and ()
Separates and groups commands
n>
Redirects output from a specific internal file ID
n>&n
Redirects output from a specific internal file ID to
another specified internal file ID.
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