I want to use space as a delimiter with the cut command.
What syntax can I use for this?
Usually if you use space as delimiter, you want to treat multiple spaces as one, because you parse the output of a command aligning some columns with spaces. (and the google search for that lead me here)
In this case a single cut command is not sufficient, and you need to use:
tr -s ' ' | cut -d ' ' -f 2
Or
awk '{print $2}'