help with !(tail -2) command.. using pipes Post: 62415

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Top Forums UNIX for Advanced & Expert Users help with !(tail -2) command.. using pipes Post 62415 by sdlayeeq on Tuesday 15th of February 2005 05:27:50 PM

02-15-2005

Registered User

Thanks guys.. but still I am not getting the correct result

this is the actual pseudocode for the script I am developing

log files are created by timestamp, so need to extract unique time stamps and save in a list file.. EXCEPT the latest two, then I need to archive those files in an Archive folder (moving). so that only the latest two remains in the .LOG folder.

so I am doing. (awk '{print substr($9,1,14)} as filename is of 14 char.)

cd $LOGDIR
ls -ltr *.log |awk '{print substr($9,1,14)}'|sort -u|!(tail -2) > filenameslist

I tried the following command suggested by one of the guru.. but it is throwing me an error.

ls -ltr *.log |awk 'print substr($9,1,14)}'|sort -u|awk '{if (NR >3) print $0}' > filenameslist

Thanks a lot guys for the valuable thougts.. can any body have a better Idea.

challenge is to get it done using pipe.. I mean in one line

sdlayeeq

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LEARN ABOUT SUSE

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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