I am running a backup script using tar. I am trying to set the option to update, but I am getting the error

tar: options 'Aru' are incompatible with '-f-'

the script I am using is:

tar uvpz $DRIVE/$TARGET_MACHINE > laptop.tar.gz
rm -rf $DRIVE/$TARGET_MACHINE

when I use:

tar cvpz $DRIVE/$TARGET_MACHINE > laptop.tar.gz
rm -rf $DRIVE/$TARGET_MACHINE

with the c instead of the u, everything works ok, it just does the full backup. Does anyone have any idea how to change this? I have already looked at the help for tar but it didn't help me.

Cheers,

Dennis

did you read the man page??
http://man.linuxquestions.org/index....ction=0&type=2

yup and as you can see the options are set right as tar uvpz

any other suggestions or am I missing something??

redirecting the output is about the same as using f. maybe tar can't update a file. you should use something like dar.

tar should be able to update though, the option is there

Dunno much about scripts, but I've used tar from tha command line and got an error when using several parameters. When I changed the order of the parametres everything went fine... might just work in your case.

tar: options 'Aru' are incompatible with '-f-'

tar told him he can't update with f. i'm guessing you can only update with a tape, which is what tar was made for.

here's how.
http://www-es.fernuni-hagen.de/cgi-b...%20to%20update

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