An awesome Rexx interface to RACF. No more issuing LU/RLIST commands and trapping output like some sort of caveman.
Official IBM manual pages
IRRXUTIL overview presentation by Mark Nelson

Chatting with a mainframe security buddy of mine some time ago I realised that not many people know about IRRXUTIL and even fewer actually use it in anger (mostly thanks to useful tools like zSecure and Vanguard) so I decided to collect and collate some samples.

Because OUTTRAPping stuff is tedious and annoying.

You will need access to one or more IRR.RADMIN.** profiles in the FACILITY class.

ALLUSR - Lists all possible info that can be extracted for a user
AUDIT - Simple audit-style report of group connections
AUDITCLS - Lists RACF classes that are active and audited
CDT - Displays info from dynamic CDT
DATASET - List a Dataset profile - z/OS 2.4 and above
EXTRACTN - Sample for continual extracts
IBMUSER - Sample for listing an ID
IDS - Feed in a list of IDs and get info
IRRXTST - Pull in CLASS and PROFILE and give access list
LISTGRPD - Modified version of XLISTGRP but read/write to a dataset
LISTUSR - Sample to list a user's group connections
RRSFCHK - Sample for how you could use IRRXUTIL to check and fix RRSF issues
RRSFLST - Lists info on your RRSF nodes
SETROPTS - Lists all SETROPTS info
TSTGRP - List a group
TSTRES - List a resource
TSTUSR - List a user
USRSEGS - List the available user segments (including CSDATA)