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How to retrieve digital string using sed or awk

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# 1  
Old 08-12-2010
How to retrieve digital string using sed or awk


I have filename in the following format:


How to retrieve only the digital part with sed or awk and return the following format:


# 2  
Old 08-12-2010
Assuming standard formatting:

#  echo "YUENLONG_20070818.DMP" | nawk -F"[_\.]" '{print $2}'

or if you know these are the only numerics, but position may be an issue:

#  echo "YUENLONG_20070818.DMP" | sed 's/[^0-9]//g'

This User Gave Thanks to Tytalus For This Post:
# 3  
Old 08-12-2010
Hi, Something like this.

ls filename | sed 's/[^0-9]//g'

# 4  
Old 08-12-2010
# sed 's/.*\([0-9]\{8\}\).*/\1/' infile

This User Gave Thanks to ygemici For This Post:

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