Triage of SUSv4 utilities list at
http://pubs.opengroup.org/onlinepubs/9699919799/idx/utilities.html

! sccs: admin delta get prs rmdel sact sccs unget val what
! fortran: asa fort77
! shell:
!   alias bg cd command fc fg getopts hash jobs kill read type ulimit
!   umask unalias wait
! build:
!   ar c99 cflow ctags cxref getcat iconv lex m4 make nm strings strip
!   tsort yacc
! obsolete: compress ed ex pr uncompress uucp uustat uux
! ipc: ipcrm ipcs
! internationalization: iconv locale localedef
! batch: batch qalter qdel qhold qmove qmsg qrerun qrls qselect qsig qstat qsub
! meh: lp mailx pax talk mesg write
  todo: at awk basename bc cal cat chgrp chmod chown cksum cmp
    comm cp crontab csplit cut date dd df diff dirname du echo env expand
    expr false file find fold fuser getconf grep head id join kill link ln
    logger logname ls man mkdir mkfifo more mv newgrp nice nl
    nohup od paste patch pathchk printf ps pwd renice rm rmdir sed sh
    sleep sort split stty tabs tail tee test time touch tput tr true
    tty uname unexpand uniq unlink uudecode uuencode vi wc who xargs
    zcat

  MISSING: bzcat catv chroot chvt count dmesg mkswap netcat oneit seq setsid
   sha1sum sync which yes

  done: basename cal cat cksum cp df dirname echo env false link nice nohup patch pwd rmdir
        sleep sort tee true tty uname unlink wc


  fiddly:
    awk bc file find sh vi man zcat

  medium hanging fruit:
    cron crontab at chgrp chmod chown cut dd diff expr fold join ls newgrp nl
    od paste pathchk printf ps renice sed stty tabs time tput tr uudecode
    uuencode csplit getconf grep test

  low hanging fruit:
    cmp comm date du expand fuser head id kill ln mkfifo
    logger logname mkdir more mv rm
    split tail touch uniq who xargs unexpand

directory recursing:
  HLPx
  notes:
    chgrp has -HLP but chmod never follows symlinks?  (What about to files?)

new argument stuff:
  -m mode
  -u one two three [repeat until spanked, variant of list]