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Extract a string from a line

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# 1  
Old 02-15-2011
Extract a string from a line
Hiee all

Can anyone tell me how to extract a string from a given line.
Code:
STAPISDK_RELEASE_32_BL012_2011_JAN_25.1597

I want to extract BL012 from above.

as 102 keeps on changing i want smthing like that it extract BL and 102 extrct by its own.

Thankx guyzz
Last edited by Yogesh Sawant; 02-15-2011 at 07:09 AM.. Reason: added code tags
# 2  
Old 02-15-2011
Have you tried using cut ?
# 3  
Old 02-15-2011
Code:
awk -F"_" '{for(i=1;i<=NF;i++) if($i~/BL[0-9]+/) print $i}' file

This User Gave Thanks to yinyuemi For This Post:
abhijtr
# 4  
Old 02-15-2011
Try this,
Code:
echo 'STAPISDK_RELEASE_32_BL012_2011_JAN_25.1597' | cut -d"_" -f4

# 5  
Old 02-15-2011
can u explain me how did u do it? It will be great if u spend your litl bit time to explain me ?
thanx a lot
can u explain me how did u do it? It will be great if u spend your litl bit time to explain me ?

Quote:
Originally Posted by yinyuemi
Code:
awk -F"_" '{for(i=1;i<=NF;i++) if($i~/BL[0-9]+/) print $i}' file

# 6  
Old 02-15-2011
Code:
-F"_": using "_" as record separator variable
for (i=1;i<=NF;i++) :make a loop
if($i~/BL[0-9]+/) print $i : if $i contains patten "BL[0-9]+", which you want, then print it

This User Gave Thanks to yinyuemi For This Post:
abhijtr
# 7  
Old 02-15-2011
Bug thanks yaa.
Quote:
Originally Posted by yinyuemi
Code:
-F"_": using "_" as record separator variable
for (i=1;i<=NF;i++) :make a loop
if($i~/BL[0-9]+/) print $i : if $i contains patten "BL[0-9]+", which you want, then print it
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