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Full Discussion: Deleting all lines except last 500
Top Forums Shell Programming and Scripting Deleting all lines except last 500 Post 302802831 by Jotne on Sunday 5th of May 2013 04:42:22 AM
Old 05-05-2013
cat t
Code:
one
two
three
four
five
six
seven
eight
nine
ten

Code:
tail -n 3 t
eight
nine
ten

Code:
awk '(s-NR)<3' s=$(cat t | wc -l) t
eight
nine
ten

This User Gave Thanks to Jotne For This Post:
ailnilanjan
 

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LEARN ABOUT DEBIAN

impressive-gettransitions

IMPRESSIVE-GETTRANSITIONS(1)				      Debian GNU/Linux manual				      IMPRESSIVE-GETTRANSITIONS(1)

NAME

       impressive-gettransitions - Generate Impressive info scripts for LaTeX presentations

SYNOPSIS

       impressive-gettransitions FILE.tex

DESCRIPTION

       A simple script to produce a .info file for use with Impressive, using special comments in a LaTeX/Beamer file. FILE.tex is a file to be
       parsed into .info file. For each /fullpath/blah.tex /fullpath/blah.pdf.info gets produced.

SYNTAX

       In the LaTeX document, impressive-gettransitions counts the pages to determine the PDF slide number of each one.

       The simpler page changes are automatically detected, that is:
	   egin{frame} and:
	   pause

       Other, more elaborated page changes must be noted with a %O comment:
	   item<1-> Foo
	   item<2-> Bar %O

       The transition to apply can be specified in a %O comment:
	   egin{frame} %O SlideUp

OPERATION

       When the .info file corresponding to the LaTeX document already exist, impressive-gettransitions does not clear it, but only adds the
       transitions if finds to it.

       Thus, if you modified your document in a way that requires to completely replace the transitions, manually clear the PageProps section of
       the .info file. This can be done by running the following sed command:
	   sed -i -e "/^PageProps = {/,/^}/d" FILE.info

SEE ALSO

       impressive(1)

AUTHOR

       impressive-gettransitions (originally gettransitions) has been written by Rob Reid.

       This manpage has been originally written by Yaroslav Halchenko <debian@onerussian.com>.

Debian Project							    2012-02-10					      IMPRESSIVE-GETTRANSITIONS(1)
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