August 26, 2015

Symbolic link hack and its prevention in cPanel based servers.

Linux General,

Just like we use shortcut in windows based operating system. Symbolic link (symlink or soft link) is a shortcut like file in linux operating systems. In linux a normal user cannot access server main/root directory. So, they use this symlink option as a tool to hack/gain access to server main/root directory. User will create a…

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August 14, 2015

DNS Configuration (Internal and External)

Linux General,

bind-9.8.2-0.17.rc1.el6_4.6.i686.rpm bind-chroot-9.8.2-0.17.rc1.el6_4.6.i686.rpm

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July 13, 2015

Routing Basics

Network,

Routers in a network discover remote networks in two ways Statically configured routes Dynamic routing protocols By default routers knows only the directly connected networks represented.

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July 8, 2015

Routers Basics

Network,

It is an internetworking component that connects networks at different geographical locations.It has

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July 1, 2015

Networking Basics

Network,

A network is any collection of independent computers(devices) which are connected to one another to share files and peripherals such as printers, modems, tape drives.

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June 18, 2015

Iperf

Linux General,

Iperf was developed by NLANR/DAST as a modern alternative for measuring maximum TCP and UDP bandwidth performance. Iperf allows the tuning of various parameters and UDP characteristics. Iperf reports bandwidth, delay jitter, datagram loss.

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June 2, 2015

MySQLTuner-perl Script

Linux General,

MySQLTuner is a script written in Perl that allows you to review a MySQL installation quickly and make adjustments to increase performance and stability. The current configuration variables and status data is retrieved and presented in a brief format along with some basic performance suggestions.

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May 25, 2015

Linux – Creating a Partition Size Larger Than 2TB using Parted Command

Linux General,

Disk /dev/sdb: 3000.6 GB, 3000592982016 bytes 255 heads, 63 sectors/track, 364801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes

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May 12, 2015

Add multiple interface and IP address – ubuntu and centos

Linux General,

Save IPs in a file like /opt/dummy.txt and run the script to add them up. Interface add script–Ubuntu or Centos: echo Enter Distribution ubuntu\/centos

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April 30, 2015

MEGACLI Commands to check Hardware RAID config and Setup

Linux General,

01:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator] (rev 05) The above command shows the RAID controller vendor details.

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