Hmmm... I don't know if it's just me, but that question doesn't make much sense: "whatever the last instance of the delimiter is"
The delimiter is going to be the same throughout the expression. As far as I know, cut only supports one delimiter character. So the last delimited will always be the same as the first...
However, what I
think you're asking is how to display the last field regardless of how many delimiters are present. I don't think cut can do that for you, but you can do it rather simply with awk:
Code:
echo "1.2.3.4.5.six" | awk -F '.' '{print $NF}'
