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Shell Programming and Scripting

Execution problems when added two same content in each line

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# 1  
Old 10-07-2010
Execution problems when added two same content in each line
Input:
Code:
>sample_1
ASDAFDGSGH
>sample_2
ASDFDAFDSFS
>sample_3
ASDAFDAFDFD
>sample_4
ASDFDFDSFDSF
.

Desired output
Code:
>sample_1
ASDAFDGSGHXX
>sample_2
ASDFDAFDSFSXX
>sample_3
ASDAFDAFDFDXX
>sample_4
ASDFDFDSFDSFXX
.
.

I plan to add two more word "XX" at the end of each sample content.
Thanks for any advice Smilie
# 2  
Old 10-07-2010
For your provided input the below codes gives the expected output.
Code:
perl -i -pe 's/^([^>].+)$/$1XX/'  input_file

# 3  
Old 10-07-2010
Code:
awk '/^>/ {print;getline;print $0 "XX"}' infile
or
awk '!/^>/ {$0=$0 "XX"}1' infile

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