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Shell Programming and Scripting

finding the number of dtsessions

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# 1  
Old 02-21-2011
finding the number of dtsessions
I am trying to find out the number of dtsessions.
using the command
Code:
wc -l $FILE_NAME

it works fine

But when I try to assign this value to some variable using the command
Code:
set NUM_DT_SESSION=$(wc -l $FILE_NAME)

it shows error Variable syntax

find below the complete command sequence
Code:
adroit:/home/seo/hitendra 66 ] set PATTERN='dtsession'
adroit:/home/seo/hitendra 67 ] set FILE_NAME='dt_list'
adroit:/home/seo/hitendra 68 ] ps -eaf | grep $PATTERN > $FILE_NAME 
adroit:/home/seo/hitendra 70 ] wc -l $FILE_NAME
13 dt_list
adroit:/home/seo/hitendra 71 ] set NUM_DT_SESSION=$(wc -l $FILE_NAME)
Variable syntax

Is there any command to directly find the number of dtsessions??
# 2  
Old 02-21-2011
Can you try without using the set. But you have -c option for grep which gives the total count of the pattern in the file to be searched. Better you try this option instead of grep'ing and then counting the lines.
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