cut
TextPackage: coreutils
Extracts columns from text, by character or by field with -d and -f. Enough for /etc/passwd; awk takes over when the separator is a variable run of spaces.
What its options do in the lessons
From the same glossary the lessons render under their commands, so the two cannot disagree.
cut -d- The field delimiter.
cut -f- Which fields to keep.
-f2-keeps the second and everything after it.
Lessons that teach it
No lesson names it among its useful commands; it appears inside other lessons' command lines.