code: def httpd_cmd(broker):
          
          ps = broker[DefaultSpecs.ps_auxww].content
          ps_httpds = set()
          for p in ps:
              p_splits = p.split(None, 10)
              if len(p_splits) >= 11:
                  cmd = p_splits[10].split()[0]
                  # Should compatible with RHEL6
                  # e.g. /usr/sbin/httpd, /usr/sbin/httpd.worker and /usr/sbin/httpd.event
                  #      and SCL's httpd24-httpd
                  if os.path.basename(cmd).startswith('httpd'):
                      ps_httpds.add(cmd)
          # Running multiple httpd instances on RHEL is supported
          # https://access.redhat.com/solutions/21680
          return list(ps_httpds)
docs: Command: httpd_command