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Top Forums UNIX for Dummies Questions & Answers Rsync copy files if dont exist Post 302723587 by Spadez on Tuesday 30th of October 2012 11:43:04 AM
Old 10-30-2012
Rsync copy files if dont exist

I have a setup where I have two drives.
  • TV
  • TVbackup

For what ever reason, I have a lot of content on my TVbackup drive which isn't on my TV drive.
  1. I want to copy all the files across which are on TVbackup but are not currently on TV.
  2. If there is a file with the same name but a different size or date, I want to copy this across too, perhaps with a (1) after it, or something similar so it doesnt overwrite the existing file.

The end result is that the TV drive will end up having all of the files which are on the TVbackup drive as well as its own files.

My starting point is this:
Code:
rsync /media/tvbackup /media/tv

But how do I make it skip if the same file (size and date) already exists in the destination.

Last edited by vbe; 10-30-2012 at 12:55 PM..
 

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volcheck(1)							   User Commands						       volcheck(1)

NAME
volcheck - checks for media in a drive and by default checks all floppy media SYNOPSIS
volcheck [-v] [-i secs] [-t secs] pathname DESCRIPTION
The volcheck utility tells Volume Management to look at each dev/pathname in sequence and determine if new media has been inserted in the drive. The default action is to volcheck all checkable media managed by volume management. OPTIONS
The following options are supported: -i secs Set the frequency of device checking to secs seconds. The default is 2 seconds. The minimum frequency is 1 second. -t secs Check the named device(s) for the next secs seconds. The maximum number of seconds allowed is 28800, which is 8 hours. The fre- quency of checking is specified by -i. There is no default total time. -v Verbose. OPERANDS
The following operands are supported: pathname The path name of a media device. EXAMPLES
Example 1: A sample of the volcheck command. The following example example% volcheck -v /dev/diskette /dev/diskette has media asks Volume Management to examine the floppy drive for new media. The following example example% volcheck -i 2 -t 600 /dev/diskette1 & asks Volume Management if there is a floppy in the floppy drive every 2 seconds for 600 seconds (10 minutes). FILES
/dev/volctl Volume Management control port ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWvolu | +-----------------------------+-----------------------------+ SEE ALSO
eject(1), volcancel(1), volmissing(1) rmmount(1M), vold(1M), rmmount.conf(4), vold.conf(4), attributes(5), volfs(7FS) WARNINGS
Due to a hardware limitation in many floppy drives, the act of checking for media causes mechanical action in the floppy drive. Continu- ous polling of the floppy drive will cause the drive to wear out. It is recommended that polling the drive only be performed during periods of high use. SunOS 5.10 21 Feb 1997 volcheck(1)
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