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Help with delete "_" once detected from the end of a content

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# 1  
Old 02-02-2012
Help with delete "_" once detected from the end of a content
Input file:
Code:
matrix-remodelling_associated_8____
aurora_interacting_1___
L20
von_factor_A_domain_1
ATP_containing_3B_

Desired output:
Code:
matrix-remodelling_associated_8
aurora_interacting_1
L20
von_factor_A_domain_1
ATP_containing_3B

I wanna delete/remove all the "_" that appears at the end of a content.
Command I try:
Code:
sed 's/_$//g' input_file.txt 
matrix-remodelling_associated_8___
aurora_interacting_1__
L20
von_factor_A_domain_1
ATP_containing_3B

It don't really give my desired output result.
Many thanks for advice.
# 2  
Old 02-02-2012
Code:
sed 's/_*_$//g'

Last edited by Franklin52; 02-03-2012 at 02:00 PM.. Reason: Please use code tags for data and code samples, thank you
This User Gave Thanks to complex.invoke For This Post:
perl_beginner
# 3  
Old 02-02-2012
A perl one-liner:
Code:
perl -pe 's/[_]*$//g' inputfile.dat

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