While working on Linux production boxes, sometimes system admin mistakenly deletes LVM partitions. Using the command ‘vgcfgrestore’ we can recover deleted LVM partitions. Linux keeps the backup copies of lvm configuration in the/etc/lvm/archive directory. In my scenario I have deleted 10GB lvm partition, follow the below steps to recover the LVM partition: Step 1: Find […]
Command To check Network Bonding/NIC Teaming in CentOS/RHEL
Network Bonding/NIC Teaming is the creation of a single bonded interface by combining 2 or more Ethernet interfaces. This helps in high availability and performance improvement. Step 1: Check the bond interface using ifconfig Command as shown below. # ifconfig | grep -i bond Step 2: Bond interface files. # cat /etc/sysconfig/network-scripts/ifcfg-bond0 BONDING_OPTS=”mode=1 primary=eth0 miimon=100″ […]
Top 5 Torrent Clients for Ubuntu and Linux Mint Desktop
Linux/Ubuntu is always never in short supply of useful utilities and applications that enhance your Linux experience to a great extent. When it comes to torrent players for Ubuntu / Linux Mint, there are indeed several of them out there and it is often a tough task to choose the best torrent player for your […]
Understanding Linux Processes from the Scratch
A process is created in memory when a program or command is initiated. A unique identification number, known as the process identification (PID), is assigned to it and is used by the kernel to manage the process until the program or command it is associated with terminates. For example, when a user logs on to […]
How to install Pidgin Internet Messenger on Ubuntu
Pidgin is a chat program tool that is used for chatting on multiple chat networks. It means at the same time you can with your friends on MSN, Yahoo or GMAIL. it Supports chat networks like AIM, ICQ, Google Talk, Jabber/XMPP, MSN Messenger, Yahoo!, Bonjour, Gadu-Gadu, IRC, Novell GroupWise Messenger, Lotus Sametime, SILC, SIMPLE, MXit, […]
How to Upgrade Mozilla firefox on Ubuntu
By default, Mozilla Firefox automatically updates itself but you can also do a manual update. You can update your firefox by following the below steps. Method 1 First, go to your Application Launcher of Ubuntu menu. Follow the complete path as given below. Applications –> System Tools –> Administration –> Software Updater As shown in […]
Java Classes and Objects Introduction
Java is an Object-Oriented Language. As a language that has the Object Oriented feature, Java supports the following fundamental concepts: Polymorphism Inheritance Encapsulation Abstraction Classes Objects Instance Method Message Parsing In this chapter, we will look into the concepts of Classes and Objects. Object – Objects have states and behaviors. Example: A Cat has states […]
Linux Boot Process
In this article, we are going to study the “Linux Boot Process”. During the booting time of the Linux operating system, the boot process has to go through six basic stages. Boot Stage 1 BIOS Checks: When a Linux server or desktop or laptop booted, The processor goes for Basic Input/Output System or BIOS program […]
IBM DB2 Installation on Red Hat Enterprise Linux
IBM DB2 database can be installed on Linux, UNIX, or Windows operating systems. We are going to install DB2 Version 10.1 on Red Hat Enterprise Linux Server from the command interface. IBM DB2 is a next-generation data platform for transactional and analytical operations. Step 1: Download IBM DB2 Package for Red Hat Linux from following […]
Difference between absolute and relative paths in Linux
Absolute Pathnames An absolute pathname begins with a slash (/). The Absolute path defines the location of a Directory or a file from the root file system (/). The absolute path contains the full path to the directory or file. Examples of Absolute Path /usr/share/doc (Absolute path for a Directory) /usr/share/doc/bash/README (Absolute path for a […]