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Shell Programming and Scripting

problem is "sed"

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# 1  
Old 07-22-2010
problem is "sed"
Hi,
I want the following string to be printed :

Code:
7.5.aa.sss.dddd

out of
Code:
7.5.aa.sss.dddd_ROLD

my sed string is:

Code:
echo "7.5.aa.sss.dddd_ROLD" | sed -n 's^\(.\).\(.\).\(.*\).\(.*\).\(.*\)^\1.\2.\3.\4.\5^p'

But its not happening.
Can anyone help?
# 2  
Old 07-22-2010
Hi,

keep it simple.

Code:
echo "7.5.aa.sss.dddd_ROLD" | sed -n 's/_[^_]*$//p'

Does the trick for me.

Output:
Code:
7.5.aa.sss.dddd


HTH Chris
# 3  
Old 07-22-2010
with awk:

Code:
echo "7.5.aa.sss.dddd_ROLD" | awk -F_ '{print $1}'

# 4  
Old 07-22-2010
Code:
 
# echo "7.5.aa.sss.dddd_ROLD" | sed -n 's^\(.\).\(.\).\(..\).\(...\).\(....\)_.*^\1.\2.\3.\4.\5^p'
7.5.aa.sss.dddd

or more simple

Code:
 
# echo "7.5.aa.sss.dddd_ROLD" | sed 's/_.*//'
7.5.aa.sss.dddd

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