Need Script to check file exist and compare

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# 1  
Old 01-15-2008
Need Script to check file exist and compare

I need a script that will check for the existence of new files that FTP'd in the morning, results go to log file. The 2nd step is to compare the new file with the previous days file. If the new file size is 30% or more smaller in size then previous day this needs to also be sent to log.

This could also be completed in one step, if the script attempts to do the file size comparison and the file doesn't exist then provide error to log.

This is on Sun Server.
# 2  
Old 01-16-2008
you can make use of find command along with its mtime option to get a list of new files.
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