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Top Forums Shell Programming and Scripting How to remove the last 3 lines from many files? Post 302662773 by Sheel on Wednesday 27th of June 2012 05:55:31 AM
Old 06-27-2012
Assuming that 9th field gives the name of file from ls command.

Code:
cd /var/ww/vhost
ls -ltr *.js| grep -v '^d' | awk '{print$9}' > fileList
while read line
do
        nbrOfLines=`wc -l $line | awk '{print $1}'`
        minusThree=`expr $nbrOfLines - 3`
        head -$minusThree $line > new$line
done < fileList

 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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