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11-28-2010, 12:46 PM
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#1
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LQ Newbie
Registered: Oct 2006
Posts: 24
Rep: 
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echo $$
What does echo $$ give as output?
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11-28-2010, 12:51 PM
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#2
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LQ Veteran
Registered: Sep 2003
Posts: 10,532
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From the bash man page:
Quote:
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Expands to the process ID of the shell. In a () subshell, it expands to the process ID of the current shell, not the sub-shell.
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11-28-2010, 12:55 PM
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#3
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LQ Addict
Registered: Jul 2002
Location: East Centra Illinois, USA
Distribution: Debian stable
Posts: 5,908
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$$
process ID variable. The $$ variable holds the process ID of the script in which it appears.
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11-29-2010, 06:04 AM
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#4
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LQ Newbie
Registered: Oct 2006
Posts: 24
Original Poster
Rep:
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thanks.
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