|
|
|
|
UGU: Unix Guru Universe - Unix Tip #4639- November 23, 2023
- Home : Help
: Today's Tip
Unix Tip #4639- November 23, 2023
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
4638
- SORT BY FILE SIZE
4637
- ZERO THOSE LOG FILES
4636
- REBOOTING BECAUSE OF FORK BOMBS
4635
- WHAT TIME IS IT REMOTELY?
4634
- WHEN DID THAT SHELL GET DISCONNECTED?
I want to
SUBSCRIBE
and get a UGU Tip everyday.
I want to
UNSUBSCRIBE
and NOT get a UGU Tip everyday.
If you have a UNIX TIP let us know, we just may use it:
(All tips become the property of the Unix Guru Universe)
|
|
| |
Copyright 1994-2018 Unix Guru Universe
|
|
|
|
|
Home
