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Sahil Sharma
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SED Command Basics
SED also known as Stream Editor, Here we will discuss the basic functionality of the sed that will help in simple scripts with bash. General Syntax: # sed OPTIONS ' ADDRESS ACTION' FILENAME in the above syntax, OPTIONS: We generally use some options with co...

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MySQL Master-Slave Replication
Install a MySQL in Master Server First, proceed with MySQL installation using YUM command. If you already have MySQL installation, you can skip this step. # yum install mysql-server mysql Configure a MySQL in Master Server Open my.cnf configuration file wit...

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Setup Two instances of OTRS on same server
This setup will describe how to run multiple instances of OTRS on one host. We will install OTRS and Apache from sources. Download OTRS from following link: http://ftp.otrs.org/pub/otrs/ Download APACHE from following link: http://httpd.apache.org/download....

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Virtual IP Configuration
Configuring multiple IP addresses on the single interface is known as virtual IP configuration. Some time also known as the IP alias. IP aliasing is very useful in case of creating different websites on same server using virtual hosting (IP based virtual ho...

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IP Bonding
In linux IP bonding generally refers to aggregate multiple network interfaces into single logical interface called as bonded interface. The activity of the bonded interface depends on the mode chosen. There are different modes available in IP bonding that p...

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Packet Capturing using TCPDUMP
Packet Capturing using TCPDUMP TCPdump has a powerful language you can use to describe and filter packets, ranging from matching semantic attributes of the packets, protocols, hosts, and ports being used right down to filtering attributes in the TCP and UDP...

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Network Discovery using NMAP
Network Discovery using NMAP Nmap is a network scanning and host detection tool that is very useful during several steps of penetration testing. It can be used for following purposes: 1. Detect the live host on the network. 2. Detect the open ports on the h...

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RAID Concept


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What to do when you have deleted /etc/fstab file from Linux and rebooted the server?
/etc/fstab is one of the most critical file in the Linux system. It contains the filesystem tables and information of the mount points. We need this file information at the time of reboot. Partition information is required to mount / partition and other par...

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