The DNS system is used to associate IP addresses with domain names. The value of ServerName is returned when the server generates a URL. If you are using a certain domain name, you must make sure that it is included in your DNS system and will be available to clients visiting your site.
Posted Date:- 2021-10-11 07:48:47
Both are categorized as a Web Server and here are some of the main differences.
Nginx is an event-based web server where Apache is process based
Nginx is known for better performance than Apache
Apache supports a wide range of OS where Nginx doesn’t support OpenVMS and IBMi
Apache has a large number of modules integration with backend application server where Nginx is still catching up
Nginx is lightweight and capturing the market share rapidly. If you are new to Nginx, then you may be interested in checking out my articles on Nginx.
Posted Date:- 2021-10-11 07:47:53
There are two popular log files created;
access.log – all request details with the status code
error.log – capture all the errors within apache or connecting in the backend.
Posted Date:- 2021-10-11 07:45:21
mod_evasive is a third-party module that performs one simple task and performs it very well. It detects when your site is receiving a Denial of Service (DoS) attack and it prevents that attack from doing as much damage. mod_evasive detects when a single client is making multiple requests in a short period of time and denies further requests from that client. The period for which the ban is in place can be very short because it just gets renewed the next time a request is detected from that same host.
Posted Date:- 2021-10-11 07:44:28
This is a way of hosting more than one domain names on one server using a single IP address. This way, the single server can share its resources which may include memory, processor cycles among others to ensure its efficient use.
Posted Date:- 2021-10-11 07:43:44
You can drop the WAR file inside the web apps folder or use the Tomcat manager to deploy War files.
Posted Date:- 2021-10-11 07:43:02
200 – content found and served OK
403 – tried to access restricted file/folder
503 – the server is too busy to serve the request and in other words – service unavailable.
Posted Date:- 2021-10-11 07:42:19
You can explain based on your experience, however, typically for Internet-facing applications, it would be in the Internet DMZ network and for intranet, core network.
But again this will differ based on application/organization.
Posted Date:- 2021-10-11 07:41:18
No, it will not be possible to capture the MAC address of the clients who are using your server.
Posted Date:- 2021-10-11 07:40:25
1 Servlet life cycle
1 Servlet life cycle
A servlet life cycle can be defined as the entire process from its creation until the destruction.
Life cycle steps followed by a servile
The servlet receives a request from a client through one of its connectors then is initialized by calling the init() method.
The servlet calls service() method to process a client’s request and send the response.
The servlet is terminated by calling the destroy() method.
The servlet is garbage collected by the garbage collector of the JVM.
Posted Date:- 2021-10-11 07:39:39
Adding the logLevel Debug provides you with more information in the error log in order to debug an issue.
Posted Date:- 2021-10-11 07:38:52
Tomcat is a servlet container that supports servlets and JSP technology. An Application server supports many other Java EE technologies. company
Posted Date:- 2021-10-11 07:38:11
Tomcat server provides a host of services which are not provided by normal web servers like Apache Web Server. Those are:
Servlet Life cycle
Handle Web Requests
Database connection pooling
Clustering
High availability
Posted Date:- 2021-10-11 07:37:13
If running Linux, then you can put a script in /etc/init.d/ and enable to start on boot using chkconfig command
Let’s say you create a file called apache and put under /etc/init.d
chkconfig --add apache
chkconfig apache on
if on Windows, then ensure startup type is selected “Automatic.â€
Posted Date:- 2021-10-11 07:36:33
The Common Gateway Interface (CGI) is a computer interface protocol that allows web servers to run an external programme, usually to handle user requests.
Posted Date:- 2021-10-11 07:35:59
A JNDI DataSource object is a file that holds the database connection configuration information. A JNDI server must be used to register the DataSource object, which is then identifiable by a JNDI name. You can use the JNDI service on your application server to register your DataSource object.
Posted Date:- 2021-10-11 07:35:17
The default session timeout in Tomcat is 30 minutes, which you can change in $tomcat home/conf/web.Xml by modifying the entry below. 30
Posted Date:- 2021-10-11 07:34:47
You can use a tool like ApacheBench, SIEGE to perform the load test on web servers including Apache. Another option to perform stress test online to see the overall how web application performs under load.
Posted Date:- 2021-10-11 07:34:13
There are two types of connectors in Tomcat: HTTP Connectors: It has a number of attributes that may be adjusted to control how it works and access features like redirects and proxy forwarding. AJP Connectors: They function similarly to HTTP connectors, however they use the AJP protocol instead of HTTP. The mod jk plug-in technology is extensively used in Tomcat to implement AJP connectors.
Posted Date:- 2021-10-11 07:33:41
The primary distinction between a web server and an application server is that a web server can only execute web applications, such as servlets and JSPs, and has just one container, the Web container, that is used to understand and execute web applications. The application server has the ability to run Enterprise applications, i.e. (servlets, jsps, and EJBs) It consists of two containers: Web Container (for servlets and jsps interpretation and execution) Container for EJB (for executing EJBs). It may execute tasks such as load balancing and transaction demarcation, among others.
Posted Date:- 2021-10-11 07:33:13
Again, you better tell the truth but to make you aware, there are many web servers in the market including the following.
> Nginx
> Microsoft IIS
> LiteSpeed
> GWS
Posted Date:- 2021-10-11 07:32:40
Webserver refers to a transaction that involves an HTTP request and an HTTP response. Webservers use the internet to listen for HTTP requests and respond with HTTP responses. They merely output HTML and do not execute business logic. They can provide HTTP server. They are static.
Posted Date:- 2021-10-11 07:31:53
No. You can add "-D" options to Java if you know how to change Tomcat's startup scripts. However, such properties cannot be added to web.xml or the webapp's context.
Posted Date:- 2021-10-11 07:31:11
Tomcat Servlet Container is a container for servlets. The servlets are contained within a servlet container. This container handles the implementation of Java Servlet and Java Server Pages. Provides an HTTP web server environment in which Java code can be run. Garbage collection is reduced. Platform integration wrappers for Windows and Unix.
Posted Date:- 2021-10-11 07:30:45
Running Tomcat as a Windows service has a number of advantages, including: Automatic startup is critical in environments where a system may need to be re-started remotely after maintenance. Tomcat is frequently run on blade servers that may not even have an active monitor linked to them. Without an active user, Windows services can be started. Security: Running Tomcat as a window service allows you to run it under a separate system account that is separate from the other user accounts.
Posted Date:- 2021-10-11 07:30:08
Tomcat's directory structure is as follows: Bin contains startup, shutdown, and other scripts (*.sh for UNIX systems and *.bat for Windows systems), as well as some jar files. Server configuration files (including server.xml) and related DTDs are stored in the conf directory. Server.xml is the most significant file in this folder. It is the container's main configuration file. JARs used by container and Servlet and JSP application programming interfaces are stored in the lib directory (APIs).
Posted Date:- 2021-10-11 07:29:41
Apache TomEE (pronounced “Tommyâ€) is the Java Enterprise Edition of Apache Tomcat (Tomcat + Java EE = TomEE) that combines several Java enterprise projects including Apache OpenEJB, Apache OpenWebBeans, Apache OpenJPA, Apache MyFaces and others.
Posted Date:- 2021-10-11 07:29:09
There are many web servers as mentioned below:
1. LiteSpeed Web Server
2. GWS Web Server
3. Microsoft IIS Web Server
4. Nginx Web Server
5. Jigsaw Web Server
6. Sun Java System Web Server
7. Lighttpd Web Server
Posted Date:- 2021-10-11 07:28:42
The default port for Tomcat is 8080. You can change the default port by editing the file server.xml under the conf folder in the Tomcat installed directory. Change the property Connector port=â€8080″ to the desired port and restart Tomcat so the changes can take effect.
Posted Date:- 2021-10-11 07:27:37
The name of the Tomcat JSP engine is Jasper. It passes the JSP files for the compilation of them into Java code as servlets. With the running time, it detects all of the changes in JSP files and recompiles them often. Jasper is also the Java server pages Handler and internally it deals with the necessary compiling.
Posted Date:- 2021-10-11 07:27:04
You can add “%D†in httpd.conf file under LogFormat directive to capture the response time taken to serve the request. It will show time in microseconds.
LogFormat "%h %l %u %t "%r" %>s %b "%{Referer}i" "%{User-Agent}i"
Posted Date:- 2021-10-11 07:26:42
Apache Web is an HTTP server to serve static contents where Tomcat is a servlet container to deploy JSP files.
You can always integrate Apache HTTP with Tomcat, however, based on the requirement you need to choose either one. If you need a proper web server, then Apache HTTP else Tomcat for JSP-Servlet Container.
Posted Date:- 2021-10-11 07:26:17
I am afraid, Apache is a Web Server, and Java-based application deployment is not possible with it. However, you can integrate Java application servers like WebLogic, WebSphere, JBoss where you can deploy war, ear files.
Posted Date:- 2021-10-11 07:25:55
We may claim that we worked on httpd – 2.2.3 for this.
Posted Date:- 2021-10-11 07:25:30
There are numerous web servers, as listed below: LiteSpeed Web Server GWS Web Server Microsoft IIS Web Server Nginx Web Server Jigsaw Web Server Sun Java System Web Server Lighttpd Web Server
Posted Date:- 2021-10-11 07:25:12
The web content is hosted by Apache Tomcat, whereas the static content is served by Apache Web server, which is an HTTP server. Integrating Apache Tomcat with Apache Web Server is always an option.
Posted Date:- 2021-10-11 07:24:41
DocumentRoot directive is the configuration where you can specify the folder location from where the static files will be served. It’s also called as WebRoot.
Default DocumentRoot location is /var/www/html
Posted Date:- 2021-10-11 07:23:24
Tomcat Coyote is an HTTP connector based on HTTP/1.1 setup that accepts and sends web requests to the Tomcat engine before returning to the client who made the request.
Posted Date:- 2021-10-11 07:22:39
Under the Tomcat-users.XML configuration files, the entire Tomcat users are specified and defined. It is located in the conf folder in the server root of Tomcat.
Posted Date:- 2021-10-11 07:22:12
Often needed when you are troubleshooting the issue and wish to capture more details. You can change the logging level to debug by ensuring the following in httpd.conf file.
LogLevel debug
Posted Date:- 2021-10-11 07:21:54
This file is derived from the servlet specification in Tomcat. It contains information which is used to deploy the components on web applications or servers.
Posted Date:- 2021-10-11 07:21:37
The server.xml file is the main Tomcat configuration file which is responsible for specifying the entire setup and Tomcat configuration while startup.
Posted Date:- 2021-10-11 07:21:02
The Engine element represents the entire request processing machinery associated with a particular Catalina Service. It receives and processes all requests from one or more Connectors, and returns the completed response to the Connector for ultimate transmission back to the client.
Exactly one Engine element MUST be nested inside a Service element, following all of the corresponding Connector elements associated with this Service. ( devops training online )
Posted Date:- 2021-10-11 07:20:29
The web.xml file is derived from the Servlet specification and contains information used to deploy and configure the components of your web applications. ( data science training online )
Posted Date:- 2021-10-11 07:20:08
The Apache Software Foundation. The Apache Software Foundation is an umbrella organization that looks after a number of Open Source projects.
Jakarta is the group name for the Java-based projects of the Apache Software Foundation.
Tomcat is a Web Server that handles server-side Java (in the form of Servlets and JSPs), and it’s a part of the Apache Jakarta project group. Tomcat is the “reference†implementation of the Servlet and JSP standards – in other words, if it runs under Tomcat, it should run under any compliant Servlet / JSP container.
Posted Date:- 2021-10-11 07:19:54
The answer is yes since the installation of Apache requires the support of both the SSL and PHP support.
Posted Date:- 2021-10-11 07:19:39
No, Apache web server has no fixed limit on the total aliases and redirects that may be prompted in the configuration files. ( hadoop training online)
Posted Date:- 2021-10-11 07:19:23
Apache Tomcat is used to host the web contents whereas Apache Web server is an HTTP server that is built to serve the static contents.
There is always a possibility to integrate Apache Tomcat and Apache Web Server.
Posted Date:- 2021-10-11 07:19:08
There are a plenty of check levels provided and out of which “warn†is the default level.
1. Info
2. Debug
3. Warn
4. Notice
5. Crit
6. Alarm
7. Emerg
8. Error
Posted Date:- 2021-10-11 07:18:47
This query would display all the tables that are stored in the database.
Posted Date:- 2021-10-11 07:17:46