It is best practice to remember passwords, but because too many passwords, sometimes we forget. We are not encouraged to write the password on any paper or share the password via email. This can lead to more serious security issues.
UUID (Universally Unique IDentifier) should be unique and it is used to identify storage devices on a linux system. If you cloned a virtual machine from vCenter, the metadata containing information of UUID for the filesystem will be identical for the original and cloned copy, therefore the UUID is no longer unique in /etc/fstab. The […]
1. Introduction of Web Server (Apache Web Server) A web server generally hosts the web content, and responds to requests for this content from web browsers such as Internet explorer, Google chrome and Firefox. The example of web server are apache web server, IIS web server, Nginx webserver and litespeed web server.
Many have asked me, did Zimbra Collaboration (ZCS) 8.6.0 Patch4 will include Patch1 to Patch3? Actually, if you read the release notes document, the answer is there. ZCS patches are cumulative, meaning ZCS 8.6.0 Patch4 includes ZCS 8.6.0 Patch3, ZCS 8.6.0 Patch2 and ZCS 8.6.0 Patch1. These patch release notes provide information about the Zimbra […]
The latest release supersedes all previously released content for CentOS 7, therefore it is recommended for all users to upgrade their CentOS machines. This article will list the URL to download CentOS 7 ISO images. CentOS is an Enterprise-class Linux Distribution derived from sources freely provided to the public by Red Hat. For those who […]
Most system administrators have applied linux login banner on their servers. The purpose of this linux login banner is to show some messages or warnings when ssh session connected and before entry. The message displayed in the linux login banner is dedicated either to the system administrator who wants to perform routine system maintenance or […]
Virtualmin is an advanced web hosting control panel that is very flexible and powerful for Linux and UNIX systems. It is based on the well-known Open Source web-based system management, Webmin. It is a Webmin module for managing multiple virtual hosts, multiple virtual domains, mailboxes, databases, applications, and the entire server, from one comprehensive and […]
Linux kernel includes powerful network filtering subsystem called Netfilter. It allows kernel modules to inspect each packet crossing the linux system such as to allow or drop incoming and outgoing network packet. In older Red Hat Enterprise Linux (RHEL) release such as RHEL 5 and RHEL 6, iptables was the main method of interacting with […]
This article will explain and share how to add and remove user account with useradd(add) and userdel (remove) from the command-line on linux RHEL 6/7, CentOS 6/7, Oracle Linux 6/7 server. 1. Adding a New User to an Linux System. a) Get the useradd manual : # man useradd useradd – create a new user or […]
The following article explain how to Install and configure TigerVNC Server on CentOS 7.1 or Red Hat Enterprise Linux (RHEL 7.1) or Oracle Linux 7. TigerVNC (Tiger Virtual Network Computing) is a remote access utility that allows you to control other computers that running graphical desktop sharing in separate sessions in parallel. It is works […]
What is Tomcat Server and What is Apache Tomcat used for ? Apache Tomcat version 8 is an open source web server and servlet container developed by the Apache Software Foundation (ASF). It provides a web server environment for Java based source code and used to deploy Java Servlets and JSPs. Basically Apache is an […]
The JDK is a development tool for building applications, applets, and components using the Java programming language . It includes a useful tool for developing and testing programs written in the Java programming language and runs on the Java platform. You can go through this document to know more about new enhancement of Java JDK […]