commands used:

check what shell you are using

echo $0

make a new folder

mkdir ~/.scripts

go into that folder

cd ~/.scripts

download a file

wget 'https://example.com/path/to/file'

change permission to allow file to execute

chmod +x name_of_script or chmod +x ~/.script/name_of_script

add folder to $PATH variable

nano ~/.bashrc [ -d "$HOME/.scripts" ] && export PATH="$HOME/.scripts:$PATH" press Ctrl+x to exit; press y to save; press Enter to end

#reload your shell bash or close your terminal and open again ... https://www.youtube.com/watch?v=XM09icz7vaU