请问老师，我的VirtualHosts的DocumentRoot和<Directory>都已经配了 data/www，仍无法指向定制的index.html，但是报错和您视频的报错不一样，所以以下报错是什么意思呢？

AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using localhost.localdomain. Set the 'ServerName' directive globally to suppress this message

[Sat Apr 28 14:11:29.604310 2018] [auth_digest:notice] [pid 3236] AH01757: generating secret for digest authentication ...

[Sat Apr 28 14:11:29.605192 2018] [lbmethod_heartbeat:notice] [pid 3236] AH02282: No slotmem from mod_heartmonitor

[Sat Apr 28 14:11:29.609896 2018] [mpm_prefork:notice] [pid 3236] AH00163: Apache/2.4.6 (CentOS) configured -- resuming normal operations

[Sat Apr 28 14:11:29.609938 2018] [core:notice] [pid 3236] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'

[Sat Apr 28 14:21:51.546818 2018] [core:error] [pid 3313] (13)Permission denied: [client 192.168.0.102:6169] AH00035: access to /index.html denied (filesystem path '/data/www/index.html') because search permissions are missing on a component of the path