Confused by the sed command Post: 302940144

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Top Forums Shell Programming and Scripting Confused by the sed command Post 302940144 by Imre on Wednesday 1st of April 2015 03:32:55 PM

04-01-2015

Registered User

This SED command and the MAN pages drive me nuts, its never as simple to follow and even if you use google its almost impossible to get a simple example and visual representation of what you actually need to do. Anybody can read a story , but just show the actual practicality of it, what?

I have a file which has broken lines, unintended line feeds.
I want to repair them, so my thoughts are , find "something" unique about those particular broken lines and then do something to make them append to the rest of the line accordingly.
I have found out how to do this in AWK and GAWK.

I wish to know how to do this using SED which i understand is the most correct method.
I understand i need to use SED '/find something/ {N something something, i dont undersgand the syntax and the material i have referenced doesn't explain this in a one liner so its just ridiculous.
I have tried for a month already on and off but i am not able to win here.

The character which is unique to the broken records is a "$ at the end of the line....which is CORRECT and just a $ character is the incorrect broken line.
So i need to say find lines that end in ONLY $ and then append the NEXT line to that line with the $ character only.
So again, the lines ending with "$ are OK and the lines ending with $ NOT OK.

I use cat -vet filename.txt to see the $ characters.

I know i need to use N as an option to SED.

Appreciate the simple example and answer. Thanks

Last edited by Imre; 04-01-2015 at 04:38 PM..

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LEARN ABOUT CENTOS

paps

PAPS(1) 						      General Commands Manual							   PAPS(1)

NAME

       paps - UTF-8 to PostScript converter using Pango

SYNOPSIS

       paps [options] files...

DESCRIPTION

       paps reads a UTF-8 encoded file and generates a PostScript language rendering of the file. The rendering is done by creating outline curves
       through the pango ft2 backend.

OPTIONS

       These programs follow the usual GNU command line syntax, with long options starting with  two  dashes  (`-').   A  summary  of  options	is
       included below.

       --landscape
	      Landscape output. Default is portrait.

       --columns=cl
	      Number of columns output. Default is 1.

       --font=desc
	      Set the font description. Default is Monospace 12.

       --rtl  Do rtl layout.

       --paper ps
	      Choose paper size. Known paper sizes are legal, letter, a4. Default is A4.

       --bottom-margin=bm
	      Set bottom margin in postscript points (1/72 inch). Default is 36.

       --top-margin=tm
	      Set top margin. Default is 36.

       --left-margin=lm
	      Set left margin. Default is 36.

       --right-margin=rm
	      Set right margin. Default is 36.

       --help Show summary of options.

       --header
	      Draw page header for each page.

       --markup
	      Interpret the text as pango markup.

       --encoding=ENCODING
	      Assume the documentation encoding is ENCODING.

       --lpi  Set the lines per inch. This determines the line spacing.

       --cpi  Set the characters per inch. This is an alternative method of specifying the font size.

       --stretch-chars
	      Indicates  that  characters  should be stretched in the y-direction to fill up their vertical space. This is similar to the texttops
	      behaviour.

AUTHOR

       paps was written by Dov Grobgeld <dov.grobgeld@gmail.com>.

       This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others).

								  April  17, 2006							   PAPS(1)