+1  A: 

In this context, the | is the pipe symbol, not a bitwise or. The output of the first command is sent to the input of the next command.

Jeanne Pindar  2010-06-04 00:57:37
Marcus Adams  2010-06-04 00:59:33
logical AND connective. If the first program succeeds AND the second program succeeds the whole statement succeeds (otherwise the whole statement fails).
Artelius  2010-06-04 01:00:39

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