Most of us who belong to the web hosting industry are well aware of the fact that the products and applications released under the GNU project are free. GRUB is also a boot loader package which is available for free i.e. it is released under the GNU project. Now, I would like to explain what does GRUB do.

GRUB is actually one of the multiboot specification which will allow you to install and run 2 different operating systems of the same machine. As you will have 2 different operating systems installed on the machine, you will need an option to select the operating system you wish to run when the machine starts, otherwise this feature won’t be useful. This option is available if you have GRUB installed on the Linux Dedicated Server Hosting. Alongwith this feature, you can also select different images of the kernel and pass boot time parameters on a single operating system’s partitions to such kernels.

Most of the hosting providers who offer Linux Dedicated Servers will assist you to install GRUB boot loader on the Linux Dedicated Servers, however, it might be possible that you will have to reinstall it on your Linux Dedicated Server Hosting. For this purpose, below are some steps which can be followed in order to reinstall GRUB boot loader on Linux Dedicated Servers.

Important : The steps given below are for RedHat and CentOS operating systems only and the steps should be followed in rescue mode. Also, the steps given below are to reinstall a grub which is deleted by mistake or which is corrupted due to some reason.

1. Firstly, it is important to boot the system and hence you should do this before you proceed.

2. As the installation is to be done in the rescue mode, you should enter the rescue mode first and you can do this by entering the Linux rescue command as given below.

Note : Make sure that you enter the Linux rescue command at the installation prompt.

3. In order to mount the root partition, enter the command given below :

4. /dev/hda is the boot partition where you need to reinstall the GRUB boot loader and you can enter the command below to do so.

5. Check the file /boot/grub/grub.conf again.

Reason for the confirmation : It might be possible that some additional entries may be needed for GRUB.

6. There is only step to follow i.e. Reboot the system and you are done.

7. Congratulations as you have already Reinstalled GRUB boot loader on your Linux Dedicated Server Hosting.

Social Bookmarking

Tweet This

TCP Wrapper will check if the external source is authorized to connect to the server. If it is not authorized, the login permission will be denied and if it is authorized, the login attempt will be successful. For this reason, you can also call TCP Wrapper as a domain computer program. It is one of the best programs available to keep hackers away from your Linux based dedicated server hosting.

This program was basically developed as your Linux dedicated server is connected to the network and it is necessary to filter the network before the server anyone can gain access to the server. TCP Wrapper is indeed a very good program, however, you can read below to find out how does it work.

When someone tries to login into the server, “/etc/hosts.allow†is checked for an entry file. If it is present, it is possible to continue. Even if this is not found, it is possible to continue. However, “/etc/hosts.deny†file is checked. If there are no matches found this time too, you will be able to continue, however, if a match is found this time, you won’t be able to continue and the service will be blocked.

For better understanding about this, you can go through the below example:

Example “/etc/hosts.deny” file:

SSHD: 192.168.1.1

If the above file is present, it will block access to the computer with IP address, 192.168.1.1.

Note : It’s when someone from the computer with the IP address, 192.168.1.1 tries to login via SSH, it is possible for you to run commands on your Linux dedicated server.

The below command will send an email to the email address you have registered.

Social Bookmarking

Tweet This

Social Bookmarking

Tweet This

Zend Encoder and Zend SafeGuard Suite are some software’s which encode some files. Zend optimizer is a free application software which runs these files while boosting the running speed of PHP applications. Zend Optimizer is required by many scripts so that you can run the scripts on your server while decrypting and running them on the fly while increasing runtime performance.

http://www.zend.com/store/products/zend-optimizer.php

Installation of Zend optimizer :

Follow the steps given below to install Zend optimizer :-

1) First off grab a copy of the optimizer Linux glibc2.1to install it on your dedicated server. http://www.zend.com/store/free_download.php?pid=1

2) You will have to upload the file on your web server once you have downloaded the file locally. FTP to your server and upload it to a directory of your choice.

3) Now Uncompress/extract the file
tar zvfx ZendOptimizer*.tar.gz
cd ZendOptimizer-2.5.3-linux-glibc21-i386/

4) Now run the installer,
./install.sh

5) The welcome screen

6) The agreement

7) Where do you want to install Zend Optimizer?

Locate your php.ini file

9) Select Yes, chances are you are using Apache web server

10) Enter the location of where apache files are located

11) Zend changing your php.ini file location, make a note of this.

12) Restart your web server for the changes to take effect.

13) Apache should restart successfully.
Note:You may also restart Apache manually using # /etc/init.d/httpd restart

15) Please ensure that Zend Optimizer is working you can do the following in the shell.
php -v

16) After the installation is completed you can remove the directory.
cd to where the extracted Zend first.
rm –rf ZendOptimizer-2.5.3-linux-glibc21-i386

Social Bookmarking

Tweet This

Follow the steps given below to setup Remote MySQL :

1) Login to WHM

2) Click on SQL Services

3) Click on Setup Remote MySQL Server

4) Enter the name of the remote server in the host section and its password in the Remote MySQL Host Root Password

5) Click on ‘Setup’.

The aobve process is to setup Remote MySQL on Dedicated Server Hosting

Social Bookmarking

Tweet This

1. First, login to the server via SSH :

Code :

root@server [~]# cd /etc/sysconfig/network-scripts/

2. Then, Create a blank file ifcfg-eth0-range0 and edit :

Code :

[root@server network-scripts]# vi ifcfg-eth0-range0

3. Here IP range starts from 192.168.5.10 upto 192.168.5.30 .
Add following lines in ifcfg-eth0-range0 :

Code :

IPADDR_START=192.168.5.10
IPADDR_END=192.168.5.30
CLONENUM_START=1

IPADDR_START >> starting IP address
IPADDR_END >> ending IP address
CLONENUM_START >> will create interfaces such as eth0:0, eth0:1, eth0:2 etc …

4. As we have done some changes with the network-scripts directory,The following commands should be executed so that the changes are applied and the IP range is activated

Code :

root@server [~]# /etc/init.d/network restart

5. Now you can verify the IP address range has been added on the server with the command :

root@server [~]# ifconfig

Social Bookmarking

Tweet This

> Do not consider Apache configuration file as Data Storage. Scripts are the examples of the changes which are made to the configuration file.

> State of the domain will be lost if the configuration file is currupted. This is one of the most important file.

> You cannot consider Apache configuration file as configuration interface. Not editing the configuration file is the best way.

> Creating the configuration that works. Ofcourse, creation of nonfunctional configuration also works.

> The changes which are seen in the configuration due to various possibilities should be noted.

Social Bookmarking

Tweet This

The very first advantage of Linux is the fact that Linux is an open source operating system. This means, you will not have to pay the high licensing fees which you will have to pay if you opt for other operating systems which are available. You are able to download Linux for free and use it. The Linux website can be changed as per the users requirements and the user can even convert the Linux website to the Windows website without much trouble. Linux is very economical as you might have to pay the distribution cost to the host or the owner instead of the high licensing fees which you will have to pay if you opt for other operating systems.

If your website requires scripting languages like PHP, MySQL, or Perl etc. then Linux is the best for you as Linux is reliable and is free which will fulfill all your needs. Web hosting providers generally providers MySQL and PostgreSQL databases with Linux but there are many other databases which are supported on Linux. Linux is the first choice for web designers and programmers and the reason for this is the circles which secure Linux operating system and the server which have Linux as an operating system installed on them.

Due to these reasons which are in favor of the user Linux operating system preferred and this makes the Linux Dedicated server the choice of many users. Apart from all these benefits you will also get the benefits you get with a dedicated server. These are some of the reasons for the Linux Dedicated server to be the choice of many users.

Social Bookmarking

Tweet This

If you want the user jason’s process detailsps -aux |grep jason

from the output just kill the process id of that user and that user will be out from the shell without any wall message for him/her.

If you wish to complete this process by any other way then you can follow the steps given below :-

Task: How to halt/stop user called jason

Type the skill command as follows:
# skill -STOP -u jason

You muse be root to stop other users.
Task: How to resume an already halted user called jason

To send a CONT signal to user jason, type the following command:
# skill -CONT -u jason
Task: How to kill and logout user called jason

To send a KILL signal, type the following command:
# skill -KILL -u jason
Task: Kill and logout all users

The ultimate command to kill and logout all users, type the following command:
# skill -KILL -v /dev/pts/*

Important:Make sure that you send a notice or a warning message to the users to logout before you use the wall command which will prevent the data loss.

Social Bookmarking

Tweet This

Follow the below mentioned steps to reset Mailman password on Linux Dedicated web server Hosting :

1. First, login to cPanel

2. Click on Reset a Mailman Password

3. Now, click on Mailman user from list

4. Enter New Mailman Password and click on Change Password and you are done.

Social Bookmarking

Tweet This