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Full Discussion: compare between files size
Top Forums Shell Programming and Scripting compare between files size Post 302541205 by mogabr on Friday 22nd of July 2011 06:21:00 PM
Old 07-22-2011
Quote:
Originally Posted by mirni
make your list neat and tidy, with filenames grouped in pairs:
Code:
A.txt B.txt
C.txt D.txt

etc...

Then you can loop through the list easily:
Code:
while read A B ; do 
  sizeA=`ls -l $A | awk '{print $5}'`
  sizeB=`ls -l $B | awk '{print $5}'` 
  rat=`echo "$sizeB * 100 / $sizeA" | bc` #integer result
  if [ $rat -lt 10 ] ; then
    #do whatever
  fi
done < yourList.lst

That is assuming your filenames don;t contain whitespace characters. Otherwise, quote all variables.


You could, for example, check the number of files present against the number of files in your list.
thanks a lot for ur help

i think i dont need to check coz the value anyway will be less than 10%

thanks again for ur support
 

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LEARN ABOUT PLAN9

yesterday

YESTERDAY(1)						      General Commands Manual						      YESTERDAY(1)

NAME

       yesterday - print file names from the dump

SYNOPSIS

       yesterday [ -c ] [ -date ] files ...

DESCRIPTION

       Yesterday prints the names of the files from the most recent dump.  Since dumps are done early in the morning, yesterday's files are really
       in today's dump.  For example, if today is March 17, 1992,

	      yesterday /adm/users

       prints

	      /n/dump/1992/0317/adm/users

       In fact, the implementation is to select the most recent dump in the current year, so the dump selected may not be from today.

       With option -c, yesterday copies the dump file to the current directory.

       The date option selects other day's dumps, with a format of 2, 4, 6, or 8 digits of the form dd, mmdd, yymmdd, or yyyymmdd.

       Yesterday does not guarantee that the string it prints represents an existing file.

EXAMPLES

       Back up to yesterday's MIPS binary of vc:

	      cd /mips/bin
	      yesterday -c vc

       Temporarily back up to March 1's MIPS C library to see if a program runs correctly when loaded with it:

	      bind `{yesterday -0301 /mips/lib/libc.a} /mips/lib/libc.a
	      rm v.out
	      mk
	      v.out

FILES

       /n/dump

SOURCE

       /rc/bin/yesterday

SEE ALSO

       fs(4)

BUGS

       It's hard to use this command without singing.

																      YESTERDAY(1)
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