title: Cacti 0.8.8a / CentOS 6.4 / ERROR: opening '/usr/share/cacti/rra/*.rrd': No such file or directory
body: <p>I've just installed Cacti 0.8.8a from EPEL repo of CentOS 6.4. Everything is fine except the graphs do not show up. I checked the log of httpd then I see:</p>
  
  <pre><code>ERROR: opening '/usr/share/cacti/rra/localhost_mem_buffers_3.rrd': No such file or directory
  ERROR: opening '/usr/share/cacti/rra/localhost_proc_7.rrd': No such file or directory
  ERROR: opening '/usr/share/cacti/rra/localhost_users_6.rrd': No such file or directory
  ERROR: opening '/usr/share/cacti/rra/localhost_load_1min_5.rrd': No such file or directory
  </code></pre>
  
  <p>Seems like rrdtool did not generate those files.</p>
  
  <p>This is in /usr/share/cacti</p>
  
  <pre><code>ls -ls /usr/share/cacti
  total 872
   8 -rw-r--r-- 1 root  root   5945 Jun 28  2012 about.php
   8 -rw-r--r-- 1 root  root   5348 Jun 28  2012 auth_changepassword.php
  16 -rw-r--r-- 1 root  root  14288 Jun 28  2012 auth_login.php
  24 -rw-r--r-- 1 root  root  21658 Jun 28  2012 cdef.php
   0 lrwxrwxrwx 1 root  root     18 Jul 25 13:42 cli -&gt; /var/lib/cacti/cli
  28 -rwxr-xr-x 1 root  root  26620 Jun 28  2012 cmd.php
   8 -rw-r--r-- 1 root  root   6974 Jun 28  2012 color.php
  28 -rw-r--r-- 1 root  root  25068 Jun 28  2012 data_input.php
  36 -rw-r--r-- 1 root  root  35505 Jun 28  2012 data_queries.php
  60 -rw-r--r-- 1 root  root  60117 Jun 28  2012 data_sources.php
  36 -rw-r--r-- 1 root  root  32920 Jun 28  2012 data_templates.php
   8 -rw-r--r-- 1 root  root   6107 Jun 28  2012 gprint_presets.php
   4 -rw-r--r-- 1 root  root   3657 Jun 28  2012 graph_image.php
  16 -rw-r--r-- 1 root  root  13469 Jun 28  2012 graph.php
  12 -rw-r--r-- 1 root  root   9208 Jun 28  2012 graph_settings.php
  20 -rw-r--r-- 1 root  root  17426 Jun 28  2012 graphs_items.php
  40 -rw-r--r-- 1 root  root  40166 Jun 28  2012 graphs_new.php
  60 -rw-r--r-- 1 root  root  60571 Jun 28  2012 graphs.php
  12 -rw-r--r-- 1 root  root  10006 Jun 28  2012 graph_templates_inputs.php
  20 -rw-r--r-- 1 root  root  18542 Jun 28  2012 graph_templates_items.php
  28 -rw-r--r-- 1 root  root  26703 Jun 28  2012 graph_templates.php
  40 -rw-r--r-- 1 root  root  40313 Jun 28  2012 graph_view.php
   8 -rw-r--r-- 1 root  root   6022 Jun 28  2012 graph_xport.php
  60 -rw-r--r-- 1 root  root  60031 Jun 28  2012 host.php
  20 -rw-r--r-- 1 root  root  20031 Jun 28  2012 host_templates.php
   4 drwxr-xr-x 2 root  root   4096 Jul 25 13:42 images
   4 drwxr-xr-x 4 cacti root   4096 Jul 25 13:50 include
   4 -rw-r--r-- 1 root  root   2313 Jun 28  2012 index.php
   4 drwxr-xr-x 2 root  root   4096 Jul 25 13:42 install
   4 drwxr-xr-x 3 root  root   4096 Jul 25 13:42 lib
   0 lrwxrwxrwx 1 root  root     15 Jul 25 13:42 log -&gt; /var/log/cacti/
   4 -rw-r--r-- 1 root  root   2838 Jun 28  2012 logout.php
   4 drwxr-xr-x 2 root  root   4096 Jul 25 13:42 plugins
  28 -rw-r--r-- 1 root  root  27362 Jun 28  2012 plugins.php
   8 -rw-r--r-- 1 root  root   4310 Jun 28  2012 poller_commands.php
   4 -rw-r--r-- 1 root  root   2243 Jun 28  2012 poller_export.php
  20 -rwxr-xr-x 1 root  root  18056 Jun 28  2012 poller.php
   4 drwxr-xr-x 5 root  root   4096 Jul 25 13:42 resource
   **0 lrwxrwxrwx 1 cacti cacti    18 Jul 25 13:42 rra -&gt; /var/lib/cacti/rra**
   8 -rw-r--r-- 1 root  root   7394 Jun 28  2012 rra.php
   0 lrwxrwxrwx 1 root  root     22 Jul 25 13:42 scripts -&gt; /var/lib/cacti/scripts
  12 -rw-r--r-- 1 root  root  10820 Jun 28  2012 script_server.php
   8 -rw-r--r-- 1 root  root   5761 Jun 28  2012 settings.php
   4 -rw-r--r-- 1 root  root   1407 Jun  3  2012 snmpv3_priv_proto_none.patch
   8 -rw-r--r-- 1 root  root   6345 Jun 28  2012 templates_export.php
   8 -rw-r--r-- 1 root  root   5835 Jun 28  2012 templates_import.php
  20 -rw-r--r-- 1 root  root  19529 Jun 28  2012 tree.php
  44 -rw-r--r-- 1 root  root  44997 Jun 28  2012 user_admin.php
  68 -rw-r--r-- 1 root  root  65635 Jun 28  2012 utilities.php
  </code></pre>
  
  <p>I also changed the owner of rra folder to <strong>cacti</strong> user like this:</p>
  
  <pre><code>ls -ls /var/lib/cacti/
  total 12
  4 drwxr-xr-x 2 root  root 4096 Jul 25 13:42 cli
  0 lrwxrwxrwx 1 root  root   24 Jul 25 13:42 include -&gt; /usr/share/cacti/include
  0 lrwxrwxrwx 1 cacti root   20 Jul 25 13:42 lib -&gt; /usr/share/cacti/lib
  **4 drwxr-xr-x 2 cacti cacti 4096 Jun 28  2012 rra**
  4 drwxr-xr-x 2 root  root 4096 Jul 25 13:42 scripts
  </code></pre>
  
  <p>What should I do next?
  Thanks a lot!</p>