Tech-Recipes - Latest Comments in Remove blank lines from a file using grep

Re: Remove blank lines from a file using grep

Latthe — Mon, 08 Aug 2011 09:48:35 -0000

RDLC is worst tool

Re: Remove blank lines from a file using grep

Latthe — Mon, 08 Aug 2011 09:44:20 -0000

My Name is Latthe

Re: Remove blank lines from a file using grep

2100822 — Thu, 28 Apr 2011 05:34:22 -0000

thank you

Re: Remove blank lines from a file using grep

Guest — Mon, 28 Mar 2011 18:36:13 -0000

the problem with grep is it has a line limit (2048) lines. If you file has more lines than that it will stop when it gets there. I just learned a cool way to do the same thing using awk. I don't think it has the same limitations.

awk '{ if (length($0) > 0){ print $0 }}' inputfilename >> outputfilename

This will search inputfilename and as long as the line has one character on it it will be sent to the outputfilename eliminating blank lines in outputfilename.

Re: Remove blank lines from a file using grep

r00fus — Thu, 24 Mar 2011 00:04:42 -0000

without the -c flag it worked for me.

Re: Remove blank lines from a file using grep

colacao — Tue, 22 Feb 2011 13:36:13 -0000

this is the the only one that worked for me on a file created on Windows, thanks bryansenter

Re: Remove blank lines from a file using grep

Tntnt — Sun, 10 Oct 2010 14:45:28 -0000

Thank you

Re: Remove blank lines from a file using grep

Mark — Thu, 24 Jun 2010 11:12:28 -0000

add
| grep -v "^$"
to the end of the command chain to eliminate blank lines.

Re: Remove blank lines from a file using grep

sonu — Thu, 13 May 2010 04:28:42 -0000

both are corrects with sed and with grep but i have same question as anonymous

Re: Remove blank lines from a file using grep

peterpan — Thu, 18 Mar 2010 03:07:03 -0000

It's cool~~~~ thanks!

Re: Remove blank lines from a file using grep

sg1973 — Thu, 19 Nov 2009 16:35:04 -0000

thanks

Re: Remove blank lines from a file using grep

bryansenter — Wed, 19 Aug 2009 11:44:37 -0000

Include blank lines that aren't really blank (tabs, spaces, CRLF, etc)

grep -vc '^[[:space:]]*$'

Re: Remove blank lines from a file using grep

sivapitchai — Fri, 07 Aug 2009 18:22:49 -0000

Have you tried the above commans...?

Re: Remove blank lines from a file using grep

Luis — Fri, 13 Mar 2009 16:46:04 -0000

awsome

Re: Remove blank lines from a file using grep

Jadu Saikia — Wed, 07 Jan 2009 06:01:31 -0000

All ways together, :-)

$ grep -v '^$' file
$ grep '.' file
$ sed '/^$/d' file
$ sed -n '/^$/!p' file
$ awk NF file
$ awk '/./' file

unstableme.blogspot.com

Re: Remove blank lines from a file using grep

Anonymous — Sun, 22 Jun 2008 23:55:49 -0000

The easiest way to remove blank lines from a file is to use a sed statement. The following syntax removes the blank lines.

# cat my_file | sed /^$/d

Re: Remove blank lines from a file using grep

Anonymous — Tue, 22 Jan 2008 22:17:56 -0000

This wasn't working for me using Cygwin, then I realised that the file I was looking at had Windows line endings. There are any number of solutions to this, but the one I chose was to pipe through tr -d "r" before piping through grep. Then it worked like a charm. -- Richie Hindle, richie@entrian.com

Re: Remove blank lines from a file using grep

Anonymous — Fri, 03 Sep 2004 00:08:08 -0000

.. or, quicker, grep . <filename>

Re: Remove blank lines from a file using grep

raxxal — Thu, 13 May 2004 08:02:13 -0000

By the way, if you want to see the $ sign, in vi enter :set list
also, in cat do the following: cat -vet

Raxxal

Re: Remove blank lines from a file using grep

qmchenry — Tue, 25 Nov 2003 01:31:59 -0000

Great catch! You are absolutely correct. The recipe has been repaired. Thank you for helping to improve Tech-Recipes.

Quinn

Re: Remove blank lines from a file using grep

Anonymous — Mon, 24 Nov 2003 22:33:49 -0000

From man grep:

<ul id="quote">The caret ^ and the dollar sign $ are metacharacters that respectively
match the empty string at the beginning and end of a line.</ul>
Not "$=beginning of line, ^=end of line"