Linux installation using cacti

Installing SNMP

Http://www.zijidelu.org/thread-7479-1-1.html

Yum Install Net-snmp net-snmp-devel net-snmp-utils

CentOS Install SNMP

Install NET-SNMP

CentOS and other Redhat series products provide a NET-SNMP binary package. We can install it directly from the source.

Yum Install Net-snmp net-snmp-devel net-snmp-utils

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Description: Net-snmp-devel is to use Net-snmp-config, Net-snmp-utils is to use Snmpwalk

Configure NET-SNMP

The NET-SNMP under CentOS cannot use V3 normally in selinux environment. If you want to use SNMP v3, disable SELinux first.

Net-snmp-config--create-snmpv3-user-ro-a snmp@jiankongbao-a MD5 Jiankongbao

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Above command, create a Snmpv3 user, read only, use MD5, username is Jiankongbao, password is Snmp@jiankongbao.

Note: Please deactivate the NET-SNMP service before running.

Service SNMPD Stop

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Run NET-SNMP

The method of running the NET-SNMP service is simpler, but the name of the NET-SNMP service is SNMPD

Service SNMPD Start

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You may need to add it to the Power-on Autorun service list.

Chkconfig snmpd on

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Detect NET-SNMP

We can use Snmpwalk to detect if the SNMP service is turned on properly.

Snmpwalk-v 3-u jiankongbao-a md5-a "Snmp@jiankongbao"-l authnopriv 127.0.0.1 SYSDESCR

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Configuring the Iptables Firewall

NET-SNMP uses UDP protocol, port 161. Add the following rules to the/etc/sysconfig/iptables

-A rh-firewall-i input-p udp-s 60.195.249.83--dport 161-j ACCEPT

-A rh-firewall-i input-p udp-s 60.195.252.107--dport 161-j ACCEPT

-A rh-firewall-i input-p udp-s 60.195.252.110--dport 161-j ACCEPT

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Start how to add are blocked by the firewall, with this rule can pass

Cacti the default username and password are admin

Change the password when you log in

Error 1:php Warning:date (): It isn't safe to rely on the system ' s timezone settings

By observing the error logs of Nginx, a large number of the following errors were found:

PHP warning:date (): It isn't safe to rely on the system's timezone settings. You are are *required* to use the Date.timezone setting or the Date_default_timezone_set () function. In case you are used any of those methods and your are still getting this warning, for you most likely misspelled the timezone Iden Tifier. We selected ' asia/chongqing ' for ' cst/8.0/no DST ' instead in

By searching, it is found that from php5.3, when a function such as the date () is used, a e_notice or e_warning information is generated when the timezone is set incorrectly and every time function is invoked. Know the root cause of the problem, there are three ways to solve, any choice can be.

First, in the page using Date_default_timezone_set () Set Date_default_timezone_set (' PRC ');

Second, the use of Ini_set (' Date.timezone ', ' Asia/shanghai ') in the head of the page;

Third, modify the php.ini. Open Php5.ini Find Date.timezone Remove the preceding semicolon modify to become: Date.timezone =PRC

Note: The above settings are set for mainland China, and PRC can also be replaced with Asia/shanghai,asia/chongqing,asia/urumqi.