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Top Forums Shell Programming and Scripting How to compare prev day file to current day file Post 11465 by PxT on Wednesday 5th of December 2001 06:33:51 PM
Old 12-05-2001
Re: How to compare prev day file to current day file

Quote:
Originally posted by Smurtzy

Sound like a nightmare??? It is. Here is what I have so far, but I am having a problem figuring out how to name/compare files....
Any help would be greatly appreciated!

Well if you want to do something like:

diff $TODAYSFILE $YESTERDAYSFILE

then there are several ways to determine yesterdays date. Search the board because this is a frequently asked question. (Don't think it officially made it to the FAQ section yet though)
 

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ZDIFF(1)						      General Commands Manual							  ZDIFF(1)

NAME
zcmp, zdiff - compare compressed files SYNOPSIS
zcmp [ cmp_options ] file1 [ file2 ] zdiff [ diff_options ] file1 [ file2 ] DESCRIPTION
Zcmp and zdiff are used to invoke the cmp or the diff program on files compressed via gzip. All options specified are passed directly to cmp or diff. If only one file is specified, then it is compared to a file with the same name without the .gz extension. If two files are specified, then they are uncompressed if necessary and fed to cmp or diff. The exit status from cmp or diff is preserved. When both files must be uncompressed before comparison, the second is uncompressed to /tmp. In all other cases, zdiff and zcmp use only a pipe. SEE ALSO
cmp(1), diff(1), zmore(1), zgrep(1), znew(1), zforce(1), gzip(1), gzexe(1) BUGS
Messages from the cmp or diff programs refer to temporary filenames instead of those specified. ZDIFF(1)
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