What is $$

12-22-2007

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What is $$

What does $$ signifies?

Orbix

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12-22-2007

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The PID of the shell, or the PID of the original shell if it is a subshell

fpmurphy

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12-25-2007

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Quote:

Originally Posted by fpmurphy

The PID of the shell, or the PID of the original shell if it is a subshell

or PID of the shell script if used in a shell script.
can be used to create unique temp files :
ex:
touch temp_$$

mehmet_demirez

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12-25-2007

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Quote:

Originally Posted by Orbix

What does $$ signifies?

In some regexp dialects this is the last line of a file.

bakunin

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UNIX for Dummies Questions & Answers

What is $$