shell command to get pid

I'm trying to extract the process id of a process using a shell command.   I know how to get the line from ps using:

ps -e | grep process_name

I dont know how to further parse this output to just print the first field (i.e. the pid number).    Can anyone help?
aplattiAsked:
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galemanyConnect With a Mentor Commented:
ps -e|awk '$4 == PROC {print $1}' PROC=process_name

this works if ps -e gives an output like this:

 11602 ?          0:00 telnetd
 11604 pts/4    0:00 -sh
    877 ?          7:56 lpsched
    883 ?          0:20 lpNet
 11622 pts/4    0:00 ps
   1387 ?         0:03 nsrexecd
     912 ?         0:00 mountd  
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aplattiAuthor Commented:
By the way, I tried using awk but the syntax is confusing the hell out of me.
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aplattiAuthor Commented:
By the way, I tried using awk but the syntax is confusing the hell out of me.
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micaeleCommented:
you like grep? Use it! :) See:

ps -e | grep process_name | sed 's/^ *\([0-9]*\) .*$/\1/'

Undestend me?
see also: man sed, man regex. Good luck!
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