[, alias, bg, bind, break, builtin,
       case, cd, command, compgen, complete, continue, declare, dirs, disown, echo, enable, eval,
       exec,  exit,  export,  fc,  fg,  getopts, hash, help, history, if, jobs, kill, let, local,
       logout, popd, printf, pushd, pwd, read,  readonly,  return,  set,  shift,  shopt,  source,
       suspend,  test,  times,  trap,  type, typeset, ulimit, umask, unalias, unset, until, wait,
       while.