GNU Core Utilities
The GNU Core Utilities or coreutils is a package of GNU software containing implementations for many of the basic tools , such as cat , ls , and rm , which are used on Unix-like operating systems . 
<triplet> GNU Core Utilities <subj> Unix-like <obj> operating system <triplet> package <subj> software <obj> subclass of <triplet> GNU <subj> GNU Core Utilities <obj> has part <subj> operating system <obj> instance of <triplet> cat <subj> GNU Core Utilities <obj> part of <triplet> ls <subj> GNU Core Utilities <obj> part of <triplet> rm <subj> GNU Core Utilities <obj> part of <triplet> Unix-like <subj> operating system <obj> subclass of