@gerardsamara β you have a space before the βOβ that should not be there.
Compare:
wget takes some options, including -q (be quiet) and -O (write the output to the following file) β and the - straight after than means stdout, writing the output to the terminal. The following | bash - then βpipesβ that output to bash which executes it.
By adding that space, youβve asked wget to get the contents of the address -, O and - (again), none of which it can find.