rootraspberrypisrvwwwadminshangxiacom # tar –x imagestar tar invalid option -- �Try tar --help or tar --usage for more information

The error message indicates that the option used with the tar command is not recognized. In this case, the character preceding "x" is not the correct hyphen character (ASCII 45) but a different character.

To fix the issue, you need to replace the incorrect hyphen character with the correct one. You can do this by manually typing the hyphen character or copying it from a reliable source.

Corrected command: root@raspberrypi:/srv/www/admin.shangxia.com # tar -x images.tar