How to become a Superuser to install a package that is downloaded

Hi,

I am using Zorin 15. I found Xampp and downloaded it okay to the Downloads folder. Through the terminal I tried to run it but got this error.

Quote:

david@david-HP-Compaq-6000-Pro-MT-PC:~/Downloads$ sudo chmod +x xampp-linux-x64-7.3.10-1-installer.run chmod: cannot access 'xampp-linux-x64-7.3.10-1-installer.run': No such file or directory david@david-HP-Compaq-6000-Pro-MT-PC:~/Downloads$

I went to the terminal and made myself a Superuser (# at prompt) but it still keeps saying in the GUI that the installer needs Superuser privileges to install.

Quote:

root@david-HP-Compaq-6000-Pro-MT-PC:~/Downloads# sudo chmod +x xampp-linux-x64-7.1.33-1-installer.run root@david-HP-Compaq-6000-Pro-MT-PC:~/Downloads#

According to the Terminal I am now a Superuser but it seems the GUI doesn't know it yet.

Any tips please?