Give me another twenty years and I will still be forgetting the syntax/ordering for doing this in Bash.
# to create ln -s <path to file> <link destination> # to create or update ln -sf <path to file> <link destination>
# to create New-Item <path to file> -Value <link destination> -ItemType 'SymbolicLink' # to create or update New-Item <path to file> -Value <link destination> -ItemType 'SymbolicLink' -Force