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Input/Output

<
redirect output to a file
>
redirect output to a file
>&
redirect output and error messages to a file
>!
redirect output to a file; overwrite the file if it already exists
>>
same as >, but add to the end of file if it exists
>>!
same as >>, but create the file if it doesn't exist
<<word
read following lines as standard input until a line containing only word is read
|
pipe output to next command
|&
pipe output and error messages to next command

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