[olug] Unix Tip: I SED BLANK

[Eric Penne]

Brian R. sent out an email a couple months ago telling people about it.


--- Jeremy Bettis <jeremyb at hksys.com> wrote:
> Who signed olug up for this unix tip mailing list?  I find it
> annoying.
> If you like it so much sign up your own email, not olug at olug.org.
> 
> --
> Jeremy Bettis, Software Development Manager
> HKS Medical Information Systems, Inc.
> jeremyb at hksys.com
> 
> 
> > -----Original Message-----
> > From: Unix Guru Universe [mailto:listserv at ugu.com]
> > Sent: Tuesday, February 18, 2003 1:22 PM
> > To: olug at olug.org
> > Subject: [olug] Unix Tip: I SED BLANK
> > 
> > 
> >
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> > 
> > 			      UNIX GURU UNIVERSE
> > 			         UNIX HOT TIP
> > 
> > 			Unix Tip 1875 - February 18, 2003
> > 
> > 		    http://www.ugu.com/sui/ugu/show?tip.today
> > 
> >
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> > 
> > 
> > I SED BLANK
> > 
> > Using sed, you can remove blank lines, and
> > lines that contain only whitespace, from a
> > file using the following:
> > 
> > sed -e '/^[     ]*$/d' InputFile >OutputFile
> > 
> > Within the single quotes ('), the forward
> > slashes (/) delimit the regular expression
> > that will be interpreted by sed.  The "d"
> > before the closing single quote, tells sed
> > to delete any lines that match the regular
> > expression.
> > 
> > Within the regular expression, the caret
> > (^) matches the beginning of a line.
> > The []* matches zero to many occurrences of
> > the character list between the open bracket
> > ([) and the close bracket (]) (in the above
> > regular expression, you must insert a space
> > and a tab between the brackets).  The dollar
> > sign ($) matches the end of a line.
> > 
> > These three constructs together match any
> > blank line or any line that contains only
> > spaces and tabs (in any combination).
> > 
> > Since the standard operation of sed is to
> > echo lines to stdout, all lines except blank
> > lines (or lines that only contain whitespace)
> > will be sent to OutputFile.
> > 
> > 
> > This tip generously supported by: tim.couger at wcom.com
> > 
> > 
> > 
> >
>
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> >
>
========================================================================
> ==
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> AND
> ARE
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> FIRST.
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> >
>
========================================================================
> ==
> > 
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