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Help with remove last text of a file that have specific pattern

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# 1  
Old 05-20-2011
Help with remove last text of a file that have specific pattern
Input file
Code:
matrix-remodelling_associated_8_
aurora_interacting_1_
L20
von_factor_A_domain_1
ATP_containing_3B_
.
.

Output file
Code:
matrix-remodelling_associated_8
aurora_interacting_1
L20
von_factor_A_domain_1
ATP_containing_3B
.
.

Command I have try:
Code:
sed 's/$_//g' input_file

The command I try is wrong Smilie
I would like to delete the "_" if it is at the end of a text.
Thanks
# 2  
Old 05-20-2011
Hi,

You were there. I think next command works.
Code:
$ sed 's/_$//' infile

Regards,
Birei
This User Gave Thanks to birei For This Post:
perl_beginner
# 3  
Old 05-20-2011
Thanks ya Smilie
hehe...
you're right ^^
# 4  
Old 05-21-2011
using perl
Code:
 perl -ple 'chop if(/_$/);' inputfile

This User Gave Thanks to pravin27 For This Post:
perl_beginner
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