PID -> User (I need to know the user of a PID) Post: 37776

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printing ppid,child pid,pid

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Hello people, This question might seem to be a little naive but here it goes: I want to know the PID of a script that is running in the background. eg: There is a script called Data_Downloader.sh I am using the command: ps -ef | grep Data_Downloader.sh But I am getting the output as wrkarea...

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Hello, I would like to know what this command means? PID=$! what does "!" stand for?

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Hello, I want to save pid of a child process but I get empty file. su myuser -c "nohup ./mydaemon.sh >/dev/null 2>&1 & print $! > mydaemon.pid" This one works: nohup ./mydaemon.sh >/dev/null 2>&1 & print $! > mydaemon.pid Please help. Thank you in advance.

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apache::session::generate::md5

Apache::Session::Generate::MD5(3pm)			User Contributed Perl Documentation		       Apache::Session::Generate::MD5(3pm)

NAME

       Apache::Session::Generate::MD5 - Use MD5 to create random object IDs

SYNOPSIS

	use Apache::Session::Generate::MD5;

	$id = Apache::Session::Generate::MD5::generate();

DESCRIPTION

       This module fulfills the ID generation interface of Apache::Session.  The IDs are generated using a two-round MD5 of a random number, the
       time since the epoch, the process ID, and the address of an anonymous hash.  The resultant ID number is highly entropic on Linux and other
       platforms that have good random number generators.  You are encouraged to investigate the quality of your system's random number generator
       if you are using the generated ID numbers in a secure environment.

       This module can also examine session IDs to ensure that they are, indeed, session ID numbers and not evil attacks.  The reader is
       encouraged to consider the effect of bogus session ID numbers in a system which uses these ID numbers to access disks and databases.

       This modules takes one argument in the usual Apache::Session style.  The argument is IDLength, and the value, between 0 and 32, tells this
       module where to truncate the session ID.  Without this argument, the session ID will be 32 hexadecimal characters long, equivalent to a
       128-bit key.

AUTHOR

       This module was written by Jeffrey William Baker <jwbaker@acm.org>.

SEE ALSO

       Apache::Session

perl v5.10.1							    2010-10-18				       Apache::Session::Generate::MD5(3pm)

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