Introduction to Linux:
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Chapter 5. I/O redirection
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5.4. Summary
In this chapter we learned how commands can be linked to each other, and how input from one command can be used as output for another command.
Input/output redirection is a common task on UNIX and Linux machines. This powerful mechanism allows flexible use of the building blocks UNIX is made of.
The most commonly used redirections are > and | .
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