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UGU: Unix Guru Universe - Unix Tip #4308- December 27, 2012
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Unix Tip #4308- December 27, 2012
REMOVING BLANK LINES
To remove blank lines from a file using sed, use the following:
sed -e '/^$/d' filetoread >filetowrite
The ^ matches the beginning of a line and the $ matches the end.
The two of them together matches a line that begins and ends with
nothing in between (blank line).
The d just says delete the lines for which we have a match.
Since the standard operation of sed is to print every line,
all lines exept blank lines will be sent to filetowrite.
This tip generously supported by: code@ionet.net
NOTE: All tips provided are USE AT YOUR OWN RISK. Tips are submitted
by various unix admins around the globe. UGU suggest you read and
test each tip in a non-volitile environment before placing into
production.
LAST 5 TIPS
4307
- SORT BY FILE SIZE
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- OUTAGE LENGTHS
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