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Full Discussion: Compare file size and then copy/overwrite
Top Forums Shell Programming and Scripting Compare file size and then copy/overwrite Post 302968020 by Daniel Gate on Wednesday 2nd of March 2016 01:21:28 PM
Old 03-02-2016
Compare file size and then copy/overwrite
// Redhat

I have this code working, but need to add one more qualification so that I don't overwrite the files.

Code:
#!/bin/sh
cd /P2/log/cerner_prod/millennium/archive/
for f in *
do      [ -f "$f" ] || continue     #If this isn't a regular file, skip it.
        [ -e "/P2/backup/$f" ] && continue  #If a backup already exists, skip it.
        cp "$f" /P2/backup/          # Make a backup copy.
done

What I like to do is:

1) compare the size of the same file (i.e. p2_000001.gz).
2) if the file size (p2_000001.gz) under /P2/backup/ is larger than that under /P2/log/cerner_prod/millennium/archive/, then skip it
3) if if the file size (p2_000001.gz) under /P2/backup/ is smaller than that under /P2/log/cerner_prod/millennium/archive/, then copy or overwrite

In this case, /P2/backup/ will have always the latest file.

Please advise. Appreciate your help!
 

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idevicebackup2

idevicebackup2(1)					      General Commands Manual						 idevicebackup2(1)

NAME

       idevicebackup2 - Create or restore backup for iDevices running iOS4+.

SYNOPSIS

       idevicebackup2 [OPTIONS] CMD [CMDOPTIONS] DIRECTORY

DESCRIPTION

       Create or restore backup from the current or specified directory.

OPTIONS

       -u, --uuid UUID
	      target specific device by its 40-digit device UUID.

       -d, --debug
	      enable communication debugging.

       -h, --help
	      prints usage information.

COMMANDS

       backup create backup for the device.

       restore
	      restore last backup to the device.

	    --system
	      restore system files, too.

	    --reboot
	      reboot the system when done.

	    --copy
	      create a copy of backup folder before restoring.

	    --settings
	      restore device settings from the backup.

       info   show details about last completed backup of device.

       list   list files of last completed backup in CSV format.

       unback unpack a completed backup in DIRECTORY/_unback_/.

AUTHORS

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SEE ALSO

       idevicebackup(1)

																 idevicebackup2(1)
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