Bala-Krishna

A network is a logical extension of data communication system. In computer network, two or more computers are link together with the carrier and data communication devices for the purpose of data communication and resources sharing. The manner in which computer nodes are geometrically arranged and connected is known as the topology of network. LAN networks are commonly characterized in terms of topology. Two major classes of LAN topologies are unconstrained and constrained topology. Three basic constrained LAN topologies known as Bus, Ring and Star topologies. Specific topologies depends on the geographical scope of network. Network limited to a company’s [...]

Linux has rm command to delete files and directory in the file system. However rm command alone never work if directory is filled with content and not blank. Rm command support switches that help you to delete all files and sub-directories recursively within a target directory. $rm -rf  [name of directory] Use the command above with -rf switch to removed all content recursively without confirmation. Replace [name of directory] with actual directory name. If name of directory is not in current directory then use full path. -r switch used to delete directory even if directory not blank. -f switch used [...]

Foremost is well known application used in Linux to recover permanently deleted files. It can recover deleted files from number of files systems using data carving recover method. It support following file systems: FAT, ext3/4 and NTFS. Foremost is basically command line tools also available in Ubuntu live cd so you can even use it without installing in Ubuntu. It is safe to run this from live cd instead of running from operating system installed in hard disk. There may be more chance OS can overwrite deleted file location. How to Install Formost Open terminal and run below command to [...]

Google has developed a new apache web server module called “mod_pagespeed” that enable apache web server to load website speedily. Apache mod_pagespeed automatically optimize web pages without rewriting web resources using filters. This module includes many filters to optimize JavaScript, HTML, CSS and JPEG/PNG images. mod_pagespeed available for RPM based and Debain based Linux distributions. I am going to show you how to install this module in Ubuntu. Go to mod_speed download page and download .deb package according to your platform. Save file on your desktop or home folder. Right click on your .deb package file and select “Open with GDebi Package Installer” [...]

WinMHR is free malware check utility with additional features. WinMHR is full featured with no ads or nag screen and free for commercial and non commercial use. WinMHR works differently then other utility. It calculate hash for a every file and then check against its remote database for possible malware. The hashing process done in local pc and sent to the WinMHR server. WinMHR do not download any updates or malware signature file as all updates are done on WinMHR servers. It works on Windows XP SP3, Windows Vista and Windows 7. It take very small space in the system. [...]

This article shows how you can check a personnel computer can run 64-bit window operating system. 64-bit computer can handle large amount of data then a 32-bit system if 64-bit OS installed. 64-bit also refer to number of bits can travel between processor and memory RAM at a time. Why i would like to run 64-bit Window7 instead of 32-bit Windows7. The reason may be different for every one. I have 4GB ram in my Asus laptop but Window7 only showing 2.93 RAM is usable. Rest of the RAM portion unused. I am switching to Win7 64-bit in order to [...]

Videocon released new android based mobile phone Videocon Zeus based on Androidâ„¢1.6 Operating System which is upgradeable to Androidâ„¢2.1 OS. Videocon Zeus is feature packed phone powered by Qualcomm 600 MHz Micro-processor. This phone comes with notable features like 3G network support HSDPA 7.2MBPS and HSUPA 2MBPS, Wi-Fi, 3.5MM headset jack, 5MP camera with LED flash, 3.2 HVGA Multi-Touch Screen, GPS and 1230 mAh battery for long battery life. The phone box bundled with free accessories included the following 8GB Micro SD Card, Extra battery and free car charger. Here are full specifications. Operating System Androidâ„¢1.6 OS. Upgradeable to Androidâ„¢2.1 [...]

I hope everybody is annoyed with auto startup function of Windows Live Messenger/Windows Messenger in during your usage. So here is the instruction on how to disable windows live messenger from startup on Windows 7. Sign in to Windows Live Messenger using your login/password. Click on status bar down arrow and select “Options” from the dropdown. You may find “options” at the end of dropdown. Select “Sign In” tab and uncheck option “Automatically run Windows Live Messenger when I log on to Windows” in the right side panel. Click on Apply and Ok button to change take effect. You have [...]

You may have noticed this error when you try to execute some commands are install new software on windows 7 or windows vista . You get this screen for the program require to run as administrator but you are actually in the normal user mode. This is spacial feature called User Account Control (UAC) that check whether this program has appropriate permission run. If program require to run as administrator user and you are not login as administrator then you may receive this error. There are two way to  fix this issue. 1) This is quick  way to turn off [...]

Well, i never think to do this before. 90% windows users use My Document folder to store daily data. Changing my document path to another drive might help when you PC got crashed accidently due to male-ware or some other reason. Here is quick tip that help you out change Desktop and My Document default folder path to any drive folder. My Document Path Change Changing My Document default path is very easy.  Go to My Document folder and right click and then select properties to open properties dialog box. Change Default path in Target text field. After changing path [...]