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Full Discussion: Delete multiple lines w/ sed
Top Forums Shell Programming and Scripting Delete multiple lines w/ sed Post 38755 by criglerj on Thursday 24th of July 2003 10:44:02 PM
Old 07-24-2003
If you are using sh/ksh/bash/zsh:
Code:
sed '1d
5d' filex

I.e., you need the line break.

The awk version is a bit more direct:
Code:
awk 'NR!=1 && NR!=5' filex

This takes advantage of the default awk action, which is to print the input line. This method simply accepts all lines except 1 and 5.

It can be generalized:
Code:
#!/bin/sh
while getopts s: arg; do
    case $arg in
    s)  skip="$OPTARG"
    esac
done
shift `expr $OPTIND - 1`
awk -v "sl=$skip" 'BEGIN {
        split(sl, a, ",")
        for (i in a) skip[a[i]] = 1
    }
!skip[NR]' "$1"



Last edited by criglerj; 07-25-2003 at 12:08 AM..
 

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LEARN ABOUT REDHAT

igawk

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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