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Linux Export command

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# 1  
Old 10-30-2008
Linux Export command
Hi All,

Can anybody tell me . What does it mean by following statement

export $$

Generally export command sets up the environment variable and if any
child process is created it passes on to it

Thanks & Regards
Srivatsav
# 2  
Old 10-30-2008
"echo $$" will display the pid of bash shell, e.g. :
Code:
[sysgate@host:~] $ echo $$
24786
[sysgate@host:~] $ ps -ef | grep 24786
1000     24786 17028  0 16:20 pts/2    00:00:00 /bin/bash

# 3  
Old 10-30-2008
What sysgate is telling you - it will not work to export the current pid. Children will have the $$ defined during creation (exec) of the new process, so it will be written over, anyway. Plus that command generates a syntax error in bash.
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