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Full Discussion: Want to extract certain lines from big file
Top Forums Shell Programming and Scripting Want to extract certain lines from big file Post 302965126 by mad man on Sunday 24th of January 2016 04:55:15 AM
Old 01-24-2016
Hi Don,

Sorry for the inconvenience.

The code you have posted last is not working for me please find the way how i used it.

Code:
 
big_file='/tmp/remedixz.20160120_085021_41222370_1'
trannum="/tmp/transnum"
file_new="${big_file}_23962395676"
awk -F '~' '
FNR == NR {
	t[$1]
	tc = FNR
	next
}
{
	l[++lc] = $0
}
$1 == "%%YEDTRN" && $2 in t {
	remove t[transnum = $2]
	tc--
}
$1 == "0000EOT" {

	if(transnum) {
		for(i = 1; i <= lc; i++)
			print l[i] > ("$file_new:" transnum)
		close("$file_new:" transnum)
		printf("Transaction #%s extracted to file $file_new:%s\n", transnum,
		    transnum)
	}
	if(tc) {
		lc = 0
		transnum = ""
	} else {
		exit
	}
}' $trannum $big_file

---------- Post updated at 03:25 PM ---------- Previous update was at 03:13 PM ----------

Hi Don,

The SED you have modified and posted did not thrown any error like last time but the output file is empty.

Thanks
 

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LEARN ABOUT CENTOS

grub-render-label

GRUB-RENDER-LABEL(1)                                               User Commands                                              GRUB-RENDER-LABEL(1)

NAME

       grub-render-label - generate a .disk_label for Apple Macs.

SYNOPSIS

       grub-render-label [OPTION...] [OPTIONS]

DESCRIPTION

       Render Apple .disk_label.

       -b, --bgcolor=COLOR
              use COLOR for background

       -c, --color=COLOR
              use COLOR for text

       -f, --font=FILE
              use FILE as font (PF2).

       -i, --input=FILE
              read text from FILE.

       -o, --output=FILE
              set output filename. Default is STDOUT

       -t, --text=STRING
              set the label to render

       -v, --verbose
              print verbose messages.

       -?, --help
              give this help list

       --usage
              give a short usage message

       -V, --version
              print program version

       Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options.

REPORTING BUGS

       Report bugs to <bug-grub@gnu.org>.

SEE ALSO

       The  full  documentation  for grub-render-label is maintained as a Texinfo manual.  If the info and grub-render-label programs are properly
       installed at your site, the command

              info grub-render-label

       should give you access to the complete manual.

grub-render-label (GRUB) 2.02-2ubuntu8.3                             July 2018                                                GRUB-RENDER-LABEL(1)
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