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Full Discussion: How to replace first line of every file using awk
Top Forums Shell Programming and Scripting How to replace first line of every file using awk Post 302876742 by Corona688 on Tuesday 26th of November 2013 10:55:59 AM
Old 11-26-2013
Not bad but I would modify it a little to make it safer:

Code:
# VITAL:  Back up first!  Otherwise one typo could mangle all your input files
# and make you very sad.
tar -cf type-backup.tar *.type

for file in *.type; do
       awk 'NR==1 {$0=replace} 1' replace=">mm200" "$file" > tmpfile
       # Using cat instead of mv means $file will not change ownership
       # or permissions by accident.  This is because it overwrites the file,
       # rather than deleting it and putting a brand-new file in its place.
       cat tmpfile > "$file"
done

rm -f tmpfile

Last edited by Corona688; 11-26-2013 at 12:01 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)
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