at the first i installed tor by the Ubuntu software , and i couldn't start tor , it always shows a failure saying that if I'm under attack or if I'm having a problem with the connection , definitely none of them does exist , the second time i downloaded the tor browser normally from tor project website , and i run the written commands on the terminal , tor browser didn't work neither .
You're in the wrong directory.
The screenshot shows you running the command from your home directory (
~) but the file exists in your Downloads directory (
cd Downloads then
tar vJxf tor-browser-linux64-7.0a2-hardened-All.tar.xz
tar vJxf ~/Downloads/tor-browser-linux64-7.0a2-hardened-All.tar.xz
You could also just open the file by double clicking on it in the file manager and choose to extract it from there.