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Setup Apache 2.4 multiple virtual hosts

February 7, 2022oliver Leave a Comment

Follow steps below to setup multiple virtual hosts on Apache 2.4 Step 1 Create a new file as /etc/apache2/sites-available/aaa.com.conf to represent the virtual host configuration. In this file, you can write the detail of the virtual host setting like Step… Continue Reading →

Website Setup

Configure Apache + Tomcat with Websocket capability

March 4, 2017oliver Leave a Comment

If you configure Apache httpd server and Tomcat server together, you usually use Tomcat connect(AJP) to hook up both of them. Http requests and responses are transferred through the AJP tunnel. AJP works well on HTTP protocols. However, if you… Continue Reading →

Website Setup

CentOS 7 .bash_profile not working

February 12, 2017oliver Leave a Comment

If you experience ~/.bash_profile not loading on CentOS 7, you can try to put your script in ~/.bashrc instead.

Website Setup

Apache HTTP Server Control Interface

January 15, 2017oliver Leave a Comment

apachectl is a front end to the Apache HyperText Transfer Protocol (HTTP) server. It is designed to help the administrator control the functioning of the Apache httpd daemon. Notice. On the httpd server, /etc/resolv.conf will affect how Apache maps the… Continue Reading →

Website Setup

Apache redirect non-www URL

May 19, 2016oliver Leave a Comment

Let’s talk about how to resolve a problem that connecting to abc.com doesn’t work. What you get is 404 not found message. What we want? We want to be able to connect to www.abc.com when the user connects to abc.com… Continue Reading →

Website Setup

Configure Tomcat Manager Gui

April 13, 2016oliver Leave a Comment

This document describes how to configure Tomcat manager functionality including: Web Manager Host Manager Refer to Apache Tomcat Manager App HOW-TO Step 1 Copy manager web application folder(webapps/manager) from the Tomcat source to your webapps directory. Copy host-manager web application… Continue Reading →

Website Setup

Tomcat starts twice

February 18, 2016oliver Leave a Comment

When Tomcat starts up, the log file shows the server status.  We can understand how Tomcat works.  Due to different configuration, Tomcat may starts twice and runs two instances. Why is that? Let’s take a look at server.xml The parameter… Continue Reading →

Website Setup

Invalid access level for requested MBeanServer operation

February 18, 2016oliver Leave a Comment

If you experience error message “Access denied! Invalid access level for requested MBeanServer operation”, this may lead to a problem of lack of enough permission when you invoke MBean method. To solve it, edit jmxremote.access file. Find the user you… Continue Reading →

Website Setup

Enable Tomcat JMX

February 18, 2016oliver Leave a Comment

If you need to obtain server statistical data from Tomcat, you probably have to get it via Tomcat JMX. It’s pretty straight-forward to take a glance of what the current Tomcat server status with the JMX func by Tomcat. Tomcat… Continue Reading →

Website Setup

Tomcat error: java.lang.OutOfMemoryError

July 11, 2015oliver Leave a Comment

If Tomcat fails to start and the log shows “java.lang.OutOfMemoryError”, that means the default Tomcat configures a low memory quota you can use. The web instance actually requires higher memory but failed to have enough capacity. The result is “java.lang.OutOfMemoryError.”… Continue Reading →

Website Setup

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