Linux Servers cPanel webhosting blog » Definition / Explanation

Explain rmmod?

Gunjan — Mon, 19 Oct 2009 07:21:21 +0000

The “rmmod" is used to remove the module from kernel.The module name which you wan to remove from the Kernel (excluding the .ko) is specified to identify the module. The kernel will not remove a module that is currently being used in the kernel (a non-zero use count), but a -w option can be specified to "rmmod" to instruct the kernel to remove it once the use-count has decreased to zero.

root@gunjan#rmmod your_module

If you don’t know anything about “lsmod” then please read it first

What is lsmod command?

Gunjan — Mon, 19 Oct 2009 06:05:13 +0000

The “lsmod" command is basically used to check installed module with the kernel.To run "lsmod" command yo require root login details.After login into server run following command.

root@gunjan#lsmod

It will give all modules required with kernel.For example.

root@gunjan#lsmod
Module                  Size Used by
lockd                  61257 0
ipt_owner               6081 4
nls_utf8                6209 0
hfsplus                75589 0
dm_raid45              66509 0
dm_message              6977 1 dm_raid45
dm_region_hash         15681 1 dm_raid45
dm_log                 14529 3 dm_mirror,dm_raid45,dm_region_hash
dm_mod                 62201 4 dm_mirror,dm_multipath,dm_raid45,dm_log
dm_mem_cache            9537 1 dm_raid45
ipt_REJECT              9537 0

As well as you can also read more on lsmod here

What you mean by Virtual Server Mean?

Gunjan — Thu, 15 Oct 2009 03:16:36 +0000

This form of hosting is also commonly referred to as a “Virtual Server” or “Bulk Hosting” server because you purchase a set number of domains hosting accounts, or a set amount of disk space and bandwidth, and can manage it yourself without assistance of an Administrator. This gives you most of the control you would have if you had your own “Dedicated Server” without the high setup fees, and ongoing costs of maintaining your own equipment.In short you can also call is as mini server.

Difference between Dedicated hosting and VPS hosting?

Gunjan — Mon, 28 Sep 2009 05:54:23 +0000

A virtual private server or VPS is a method of partitioning one physical server (or dedicated server) into multiple servers that each has the appearance and capabilities of running on its own dedicated machine. Each virtual server can run its own full-fledged operating system, and each server can be independently rebooted.

Virtual private servers bridge the gap between shared web hosting services and dedicated hosting services, giving independence from other customers of the VPS service in software terms but at less cost than a physical dedicated server

Definition for PHP accelerator

Gunjan — Thu, 20 Aug 2009 22:17:32 +0000

A PHP accelerator is an extension is basically created to improve the performance of software applications using the PHP programming language.PHP accelerators work by caching and its compiled bytecode of PHP scripts to keep away from the transparency of parsing and compiling source code on each an every request.It gives best result, if caching is to basically shared memory with direct execution from the shared memory and the minimum of memory copying at runtime.A PHP accelerator typically reduces server load and increases the speed.

The list of PHP accelerators is as follows.

1) Alternative PHP Cache or APC
2) eAccelerator
3) XCache
4) Zend Optimizer
5) Zend Platform