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how to reduce a length in a file?

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Top Forums Shell Programming and Scripting how to reduce a length in a file?
# 1  
Old 02-02-2009
how to reduce a length in a file?
i want to reduce a length in the file called text

in the file im having 10 byte length.
want to reduce it to 9 byte length for all lines.
# 2  
Old 02-02-2009

Code:
FILENAME=text
cut -c1-9 "$FILENAME" > NEWFILE && mv NEWFILE "$FILENAME"

# 3  
Old 02-03-2009
i have 10 lines

each line contains 10byte length.
but in 5th line have only 9 bytes.
have to increase 5th line into 10 bytes.
how can i do that?
# 4  
Old 02-03-2009

Code:
awk '{printf "%-10.10s\N", $0}' "$FILENAME" > NEWFILE && mv NEWFILE "$FILENAME"

# 5  
Old 02-04-2009
can you please explain how this script works
# 6  
Old 02-04-2009
Code:
printf "%-10.10s ...

%-10.10s -- means "left-justified, at least 10 chars, max of 10 chars, string
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