Q: 开机进入Ubuntu之后，双击quartus会显示“Untrusted application launcher: The application launcher "Quartus (Quartus Prime 18.1) Standard Edition desktop" hasn't been marked as trusted. If you don't know the source of this file, launching it may be unsafe”。然后使用sudo chmod ugo+rx *.desktop会让我输入密码，最开始输入intel123的时候显示密码错误，后来点击账户切换之后，再输入就对了，但是依然无法双击打开quartus，显示的是同样的错误。右键quartus属性，显示的是you are not the owner,so you cannot change these permissions。
