$ cd /var/www/cacti/plugins/ (将下载好的npc.tar.gz放到该目录下)
$ tar zxfv npc.tar.gz
$ sudo vi /var/www/cacti/include/config.php
$plugins[]='npc';
:wq
$ sudo service apache2 restart
$ cd
$ tar zxfv PDO_MYSQL-1.0.2.tgz
$ sudo ln -s /usr/include/php5 /usr/include/php
$ cd PDO_MYSQL-1.0.2
$ phpize
$ ./configure
$ sudo make
$ sudo make install
$ mysql -u root -p123456
mysql> use cacti;
mysql> alter table npc_eventhandlers add long_output TEXT NOT NULL default '' after output;
mysql> alter table npc_hostchecks add long_output TEXT NOT NULL default '' after output;
mysql> alter table npc_hoststatus add long_output TEXT NOT NULL default '' after output;
mysql> alter table npc_notifications add long_output TEXT NOT NULL default '' after output;
mysql> alter table npc_servicechecks add long_output TEXT NOT NULL default '' after output;
mysql> alter table npc_statehistory add long_output TEXT NOT NULL default '' after output;
mysql> alter table npc_systemcommands add long_output TEXT NOT NULL default '' after output;