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OSXFAQ Daily Unix Tricks
Week 51 - How do I...? (14 July 2003)
by
Adrian Mayo - Senior Editor for Mac OS X Unix
Wednesday - ...Delete Blank Lines
How do I delete empty lines from a file?
Using 'sed':
% sed '/^$/d' in-file > out-file
Using 'tr':
% tr -s \\n < in-file > out-file
If the file has blank lines containing spaces:
% sed '/^[ ]*$/d' in-file > out-file
If the blank lines have tabs too:
% sed '/^[ \t]*$/d' in-file > out-file
BUT, OS X 'sed' command does not seem to understand '\t' as meaning tab.
If you want to learn more about Mac OS X Unix visit the Learning Center
click.
- For beginners: the Mac OS X Unix Tutorial
- For detailed information on specific topics: Mac OS X Advanced Unix
- For answers to common problems: Mac OS X How To
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