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How to remove spaces on a line?

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# 1  
Old 12-04-2013
How to remove spaces on a line?
Hi, suppose I have the following data:

Code:
 
albert music=top40 age=20
bob music=punk rock age=25
candy music=r n b age=22
dave music=mozart or bach only age=30

I want to extract and manipulate the music column but it's got spaces in it. How can I substitute the space with an underscore like this:

Code:
 
albert music=top40 age=20
bob music=punk_rock age=25
candy music=r_n_b age=22
dave music=mozart_or_bach_only age=30

# 2  
Old 12-04-2013
Code:
 perl -nle 'if (/^(.+?music=)(.+?)(\s*age.+?)$/) {$a=$1;$b=$2;$c=$3; $b=~s/\s/_/g;print $a,$b,$c;}' filename

This User Gave Thanks to pravin27 For This Post:
almonds
# 3  
Old 12-04-2013
Try this:

Code:
 awk -F "="  '{ OFS = "="; gsub(/ /, "_", $2) }1' file | awk '{sub(/_age=/, " age=")}1'

This User Gave Thanks to aydj For This Post:
almonds
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