By default petalinux uses sstate-cache and download mirrors from petalinux.xilinx.com
This README is for the users who uses tool completely offline.

Setting sstate cache

1) Extract the downloaded tar contents of sstate-cache at any location
2) run petalinux-config
         -> Yocto Settings
             ->Local sstate feeds settings
                  ->local sstate feeds url
                          (press Enter)
3) Provide the path of sstate-cache from above
           Ex: /<path>/aarch64  for Versal projects

4) Save the configurations to use the sstate-cache

Setting download mirror

1) Extract the downloaded tar contents of downloads at any location
2) run petalinux-config
        -> Yocto Settings
                -> Add pre-mirror url
						          ->  (press Enter)
							            Clear default value

3) Provide the path of downloads from above
        file://<path>/downloads for all projects

4) Save the configurations to use the download mirrors

5) Verify the changes in build/conf/plnxtool.conf
6) petalinux-build