When I try executing a *.sh file, I can run it from terminal, but not when double-clicking it form the file manager. The commands chmod +x Test.sh and
chmod -x Test.sh dont seem to work. Every time I double-click the file, it opens on my Text Editor. Here is the text in my file:
#!/bin/bash
xdg-open https://www.google.com
cd home/<username>/Desktop
mkdir Test
cd Test
touch test.txt
The distro that I use is Ubuntu 20.04.
chmod -x Welcome.sh is your exact problem.
-x is the same as u-x, or "remove the execute permission from my user". You need to add the execute permission with chmod +x Welcome.sh.
Also: You can change directory to your user home (if that's what username is) with just cd ~ or cd. If it's another user's $HOME, then use cd /home/<user>.
You can use xdg-mime query filetype shell_script.sh to find the mime type of the script. Afterwards, use xdg-mime query default mime_type to see the current default application associated with the mime type, which is called upon xdg-open invocation. Then you can use xdg-mime default default_application.desktop mime_type to set the default application to be used.
The command output on my laptop is,
$ xdg-mime query filetype /opt/ros/foxy/setup.sh
application/x-shellscript
$ xdg-mime query default application/x-shellscript
gvim.desktop
I need to log out and back in after marking the file as executable to apply the changes. The fastest way to do this is by using the shortcut Ctrl + Alt + Delete