Linux Export command

UNIX for Advanced & Expert Users
1

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

"echo $$" will display the pid of bash shell, e.g. :

[sysgate@host:~] $ echo $$
24786
[sysgate@host:~] $ ps -ef | grep 24786
1000     24786 17028  0 16:20 pts/2    00:00:00 /bin/bash
3

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.