第一步：（cacti的安装）
yum install net-snmp net-snmp-utils
yum install cacti
vi /etc/snmp/snmpd.conf
com2sec notConfigUser default public
access notConfigGroup "" any noauth exact systemview none none
view all included .1 80
view systemview included .1.3.6.1.2.1.1
view systemview included .1.3.6.1.2.1.25.1.1
view systemview included .1.3.6.1.2.1.2
systemctl start snmpd.service
netstat -tunlp
snmpwalk -v 2c -c public 127.0.0.1 if
whereis cacti
cacti: /etc/cacti /usr/share/cacti
find / -name cacti.sql
/usr/share/doc/cacti-0.8.8b/cacti.sql
create database cacti;
grant all privileges on cacti.* to cacti@‘localhost‘ identified by ‘cacti‘;
flush privileges;
use cacti;
source /usr/share/doc/cacti-0.8.8b/cacti.sql;
vi /usr/share/cacti/include/config.php
$database_type = "mysql";
$database_default = "cacti";
$database_hostname = "127.0.0.1";
$database_username = "cacti";
$database_password = "cacti";
$database_port = "3306";
第二步：（apache的配置）
因为是yum安装的，所以在/etc/httpd/conf.d/下自动生成了cacti.conf配置文件，默认如下：
Alias /cacti /usr/share/cacti
<Directory /usr/share/cacti/>
<IfModule mod_authz_core.c>
# httpd 2.4
Require host localhost
</IfModule>
<IfModule !mod_authz_core.c>
# httpd 2.2
Order deny,allow
Deny from all
Allow from localhost
</IfModule>
</Directory>
<Directory /usr/share/cacti/install>
</Directory>
<Directory /usr/share/cacti/log>
<IfModule mod_authz_core.c>
Require all denied
</IfModule>
<IfModule !mod_authz_core.c>
Order deny,allow
Deny from all
</IfModule>
</Directory>
<Directory /usr/share/cacti/rra>
<IfModule mod_authz_core.c>
Require all denied
</IfModule>
<IfModule !mod_authz_core.c>
Order deny,allow
Deny from all
</IfModule>
</Directory>
第三步：（报错）
报错1：
[Mon Jan 18 11:56:36.849529 2016] [authz_host:error] [pid 13997] [client 110.110.110.110:61446] AH01753: access check of ‘localhost‘ to /cacti failed, reason: unable to get the remote host name
[Mon Jan 18 11:56:36.849636 2016] [authz_core:error] [pid 13997] [client 110.110.110.110:61446] AH01630: client denied by server configuration: /usr/share/cacti
解决：
原文：http://guowang327.blog.51cto.com/6513732/1736067