The database become more fragmented whenever you delete any large data from your sql database. It is always a very good practice to optimize your database time by time especially if you are dealing with a lot of varying characters (VARCHAR).

Optimizing a single table is very easy. Here is the command that how we can optimize MySQL database single table with command line.

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Often It happens device remains busy during unmounting a device(CD, Disk or NFS shared partitions) on Linux. It is good idea Linux should tell you what is keeping the device busy? We are using Centos, and message remains same in all the time we have used Linux.

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PHP has now been widely used as a development platform for web-based applications. As PHP is in continued development process, we observe different enhancements in PHP itself. One of the major changes we have recently observed is the release of its new version PHP5. 

Now your application is developed in PHP4 and you want to upgrade it to PHP5, but you also want to test it on PHP5 first.

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I’ve stated that there must be a way of working around the need to provide the root password for certain administrative tasks. This is generally in response to threads started by people who find typing in a password when they want to install programs (For example.) to be extremely irritating.

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Qmailtoaster is a project whose purpose is to install Qmail with RPMs on RPM based Linux and these RPMs are source RPMs. The advantage of Qmailtoaster is that it contains all patches needed for Qmail for example domainkeys etc.

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There are different methods to install MySQL community server on Linux.

• Install from source tar ball
• Install from rpm
• Installing binaries
• Install from Yum repository, Yast OR apt-get

Here we will deal with the 1st option – the installation of MySQL from the source. MySQL source can be compiled on either distribution of Linux for example fedora, centos, ubuntu & slacware etc.

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Red Hat Enterprise Linux v5.4 can be updated via RHN. RHEL 5.4 includes the kernel-based virtualization, and clustered, high-availability filesystem to support Microsoft Windows storage needs on Red Hat Enterprise Linux.

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In Centos 5.x it is very easy to update Kernal Online. Simply we have to login as root and issue following command

First Check Kernels available for update

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