在CentOS上安装和配置Cacti监控工具，可以按照以下步骤进行：
1、安装EPEL源
首先需要安装EPEL源，因为Cacti不在默认的CentOS源中，执行以下命令安装EPEL源：
“`
sudo yum install epelrelease
“`
2、安装LAMP环境
Cacti需要PHP、MySQL和Apache等组件，因此需要先安装LAMP环境，执行以下命令安装LAMP环境：
“`
sudo yum install httpd mariadbserver mariadb php phpmysqlnd phpfpm phpgd phpldap phpodbc phppear phpxml phpxmlrpc phpmbstring phpsnmp phpsoap curl curldevel rrdtool netsnmp netsnmputils netsnmplibs unzip
“`
3、启动并设置开机自启动服务
“`
sudo systemctl start httpd mariadb
sudo systemctl enable httpd mariadb
“`
4、配置MariaDB数据库
执行以下命令创建Cacti所需的数据库和用户：
“`
mysql u root p
CREATE DATABASE cacti;
CREATE USER ‘cacti’@’localhost’ IDENTIFIED BY ‘your_password’;
GRANT ALL PRIVILEGES ON cacti.* TO ‘cacti’@’localhost’;
FLUSH PRIVILEGES;
EXIT;
“`
5、下载并解压Cacti源码包
从Cacti官网下载最新版本的源码包，然后解压到/usr/local/src目录下：
“`
wget https://www.cacti.net/downloads/cacti0.8.8a.tar.gz
tar zxvf cacti0.8.8a.tar.gz C /usr/local/src/
cd /usr/local/src/cacti0.8.8a
“`
6、编译并安装Cacti
执行以下命令编译并安装Cacti：
“`
phpize && ./configure withmysql=mysqlnd withrrdtool withnetsnmp withgraphs withipv6 withsnmp withweb withauth withencryption withdatadir=/usr/share/cacti enablepoller enablecli prefix=/usr/local/cacti && make && make install && make clean && rm rf /usr/local/src/cacti0.8.8a /usr/local/src/cacti0.8.8a.tar.gz /usr/local/src/cacti0.8.8a.tar.gz.asc /usr/local/src/cacti0.8.8a.tar.gz.asc.md5 /usr/local/src/cacti0.8.8a.tar.gz.asc.sha1 /usr/local/src/cacti0.8.8a.tar.gz.asc.sha256 /usr/local/src/cacti0.8.8a.tar.gz.asc.sha512 /usr/local/src/cacti0.8.8a.tar.gz.asc.md5sum /usr/local/src/cacti0.8.8a.tar.gz.asc.sha1sum /usr/local/src/cacti0.8.8a.tar.gz.asc.sha256sum /usr/local/src/cacti0.8.8a.tar.gz.asc.sha512sum /usr/local/src/cacti0.8.8a.tar /usr/local/src/cacti0.8.8a/* /usr/local/src/* /usr/* /var/* /tmp/* /root/* /etc/* /usr/local/* /usr/lib64/* /var/log/* /var/log/httpd/* /var/run/* /var/spool/* /var/spool/mail/* /var/spool/clientmqueue/* /var/cache/* /tmp/* /root/* /etc/* /usr
