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UNIX-how to find out the numeric value

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# 1  
Old 07-27-2015
UNIX-how to find out the numeric value
Hi All,

I need to found the below numeric value using unix(shell) commands in .txt file and its available in root directory.

for example: file name is siva.txt and content is

Code:
Siva_12345_werwerwe,11,22,33
Siva_12346_werwerwe,22,33,44
Siva_12347_werwerwe,55,44,66

for above string i need only 12345,12346,12347 numeric values only in before first comma(,).
Kindly help me

Thanks
Siva
Last edited by Don Cragun; 07-27-2015 at 07:11 AM.. Reason: Add CODE AND ICODE tags.
# 2  
Old 07-27-2015
Please use code tags as required by forum rules!

How or where are those strings stored? In a file? One or more shell variables?
What's your system (OS, shell)?
# 3  
Old 07-27-2015
Code:
awk -F ',' '{gsub(/[^0-9]/, x, $1); print $1}' siva.txt

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