Need Help!
Don't know if it's right thread here or it should be Nemo, try here first?

Two days ago I was running Ubiboot, correct booting Harmattan, Firefox, Nitdroid and had partition Alt_OS ready for Nemo following this instruction:
http://wiki.maemo.org/Ubiboot

Only thing missing was unpack/install Nemo to Alt_Co.:
Couldn't get this code working in Ubuntu:
sudo tar --numeric-owner -xf nemo-handset-armv7hl-n950-*.tar.bz2 -C /media/Alt_OS/

Tried unpack in Ubuntu (also Nautilus), get message: you are not owner to Alt_OS no permission to unpack
Then made great mistake by using unzip in Windows (?) AND do it wrongly ending up with mess and Fatal error in partitions, which seems solved now (?)

Before starting again install Ubiboot need to know how to run above sudo tar ...code:
Should the code be written in terminal Ubuntu exactly as it stands or should something be substituted (filled in) ex. as with this code:
flasher -F firmware.bin -F emmc.bin --no-preserve -f -R

And/or how to get permission to unpack to device Alt_Os in Ubuntu?