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May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!

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Remove blank lines from a file

Terminal - Remove blank lines from a file
sed -i.bak '/^[[:space:]]*$/d' file_name
2009-04-07 11:32:06
User: Highwayman
Functions: sed
Remove blank lines from a file

Remove blank lines from files, even if some of the lines have whitespace (spaces, tabs, etc.). Also creates a .bak copy of the original file. Works on Mac also.

Thanks to those all those who left comments.


There are 2 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

"sed -i '/^\ *$/d' file_name" does the same

Comment by prayer 372 weeks and 3 days ago

Following will remove spaces and comments

sed '/ *#/d; /^ *$/d' file_name
Comment by alperyilmaz 372 weeks and 3 days ago
sed -i '/^\s*$/d' file_name

eliminates blank lines or lines with whitespace (spaces, tabs, etc.)

Comment by daithif 372 weeks and 3 days ago

@daithif: Great job! However, your command only works on Linux (Ubuntu 8.10), but not on Mac OS X (I tested against Leopard 10.5.6). The following works on both:

sed -i.bak '/^[[:space:]]*$/d' file_name

It also makes a back up with the .bak extension.

Comment by haivu 372 weeks and 2 days ago

Your point of view

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