By enabling ‘mod_bw’ module in apache we can control bandwidth in the server for a domain. When you find a domain using bandwidth via apache service and it need to be controlled within a certain limit and on basics of files , we can use mod_bw module in apache.

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1.Copy the key and save it as .ppk extension [for eg: rsa.ppk]

2.Open puttygen.exe ( This can be downloaded from http://www.putty.org/)

3.Select Load and browse the path to the .ppk file where you have stored.

4.Then Click “Save private key”. It will ask for save and save the file in a locaion in .ppk format. [For eg: C:\MyKeys\key.ppk ]

5.Right-Click Putty and selet Edit and specify the path such asstart c:\putty -ssh root@xxx.xxx.x.x-i C:\MyKeys\key.ppk”

It is not often that we need to test the hard drive for problems, but you never know when you may have to. One of the major reasons to perform a test would be if you are seeing read-only errors often (which can normally be fixed by a reboot), the system crashing out too often, or you are seeing very slow read/write times for small amounts of data. This can often be a signs of a failing drive, something a test can point out.

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Greylisting

Greylisting is a simple way of blocking emails. in Grey listing, what it checks is that if the mail is legitimate or not. If there is a prior relationship between the sender and the receiver, the message get delivered without any issue. If the sender is suspicious and unknown the message gets temporarily rejected with 451 error message.

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One reason behind writing about this topic is because in todays hosting industry one of the major services used is the MySQL. Nowadays, everything solely depends on the working of databases. So all the high traffic websites have clustered their MySQL so that any kind of downtime or load related issues are not affecting the proper working of their website.

As we go through the working of a database, one thing that comes to our mind, how it will help if we have a caching system, something like a distributed memory system, which can be enabled in the server just to manage the traffic of MySQL databases. Yeah! you got it.. So do Brad Fitzpatrick who worked on this theory and made it a reality by developing such a caching system called MEMCACHED.

Memcached, is a simple, but powerful caching system that is mainly be used to speed up the loading of dynamic webpages by controlling the load of MySQL. Its simple design and user friendly nature makes it a paradise for the end users.

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