Monday, September 9, 2013

Making Slave MySQL Server

Setting up a slave MySQL server is a very easy process, that is, if you are aware of the actual commands and the medium which is required to execute the commands.  MySQL server is used to run different commands through a suitable medium for carrying out different actions that cannot be done otherwise. These commands are also useful for keeping the data on your computer secure. It is important to keep a proper back up of the precious data your system is holding. By having a backup it will become easy to restore the data at any required point. 

1.      These points are going to be helpful for those who are basically working from home and are unaware of the importance of the fact, that how important it is to keep a backup and your information protected.
2.      Most of the workplace computers have data backup options that help prevent accidental loss of data. In case it is lost it can be recovered easily with the help of different commands that are used to activate the backup. 

3.      This tells us that the importance of MySQL  database is quite strong if you want to make sure that your data can be transferred from one place to another in any event of loss.  Workplace managers make sure, that their employees are aware of the importance of the MySQL server and how it can save from a great loss.

·         Working of salve MySQL server 

Slave MySQL server enjoys considerable popularity in terms of functioning and user reliability. But it is more important to know the actual functions of the server and how it acts a major backup tool. One important question which might come in the mind of several programmers is that, will this server serve as an online backup tool or an offline backup tool. There is an option to choose online medium or offline medium for the protection of data. Most of the users adopt the online backup strategy in order to deal with any downtime issues.  There are several advantages of an offline backup system as it offers less number of errors and there is no need to worry about the running transactions, orphaned processes or table locks or anything else that can create errors and disrupt the normal functioning. 

·         Characteristics of slave MySQL server

Those users who can easily afford downtime and have slave replication then the offline backup method is best for them. Database is created with the help of data dump option that helps in several other processes. It can be regarded as an expensive exercise but in the end all the efforts will be worth it. The size of files will also get large when an additional SQL syntax is added. But this is not a matter of concern as it does not harm the system or functioning of other programs.  It is important to know all of the steps that are required to set up a Salve MySQL server , as  a single command that is entered wrong will disrupt the process of data migration. 

Installing MySQL with Apache 2.x

For the sake of local development and testing, Apache and MySQL are installed on the computer windows in order to serve for various purposes. 

Installing the latest apache series:

·         For the installation of the latest Apache available few simple steps are followed.
·         While going to the official website of Apache one can search for the best available version of Apache 2.x. One will encounter with the win file containing the setup of Apache version. The version has to be further downloaded on the computer. 

·         Run the file from the desired destination and keep on moving next until it asks about the server information.
·         In server information, local host information has to be given while one can give any email address when required for admin email. 

·         Change the name of the destination folder and keep on moving until the installation is done.
·         As soon as the installation is complete, the file will start running on the screen. A dos window might also open on the computer until the Apache is running on the computer.
·         The next step is the creation of index.hmtl file that can be made with simple steps and has to be saved in Apache folder. Once the file is saved open it for display if the apache is running the step is successful otherwise repeat the process.

Installing MySQL

·         Go to the official page of installing MySQL and scroll down to find the concerned link. From link find the desired file and download it to the computer. 

·         Unzip the file to some folder and run the necessary setup from given destination.
·         Once the installation is complete, one has to create the username and password for further proceedings.
·         The username and password can be modified with php later for further editing.
MySQL and Apache:

Apache helps in running the various modules of the MySQL and if Apache fails to work with the specific version that could result in using the previous MySQL libraries. Recompiling of all modules using MySQL will be a better solution to the problem. For the effective use of MySQL files with apache one needs to understand the importance of availing the options for authentication to apache. There are many online packages available that provide the source that will be helpful in upgrading the version of the program and further helps in verifying the problems. These packages vary with the system it is designed for; from Linux to the MAC system. The basic programs work for the installation of various programs that requires the selected versions of MySQL and apache. Failure in the coordination of the two files will result in the failure of the installation. The settings stand for the security as well as requirements for the concerned activity for the web server.

In short MySQL ad apache works in coordination with their related versions and provides the database that has to be run in order to perform the specific function on the computer. These stand for the efficient components on the web server.

Import/Export MySQL

Generally speaking importing and exporting data in the MySQL is not a difficult task and there are three different ways specified for the efficient working. The first method is to perform it through graphical means with the help of  phpMyAdmin while the method is not highly recommended in case of uploading heavy files on system. The next method is the utilization of the SSH tunnel in which a third party is used to execute the importing function for the system. The last method is to make use of the command line client for MySQL through the SSH connection.

As there are different ways used to develop the backup or restoring for the MySQL yet there are some limitations in each method. The best way recommended is to perform the task locally which helps in dumping of data on the disk in a much faster speed. By simply using the dumping procedure as well as utilities one can perform the task in much better time and error free method. 

Import data of MySQL

One of the widely used methods for restoring or importing data on the server is to start creating with the username for MySQL. Once the account information is made that includes a database, password and username, one is ready for the further proceedings.

·         Upload the dump file of the SQL to the account from the database. Majority files can be recognized with .sql extensions.

·         The file will contain the necessary statements and the tables on which the action of reinserting will be performed. 

·         After uploading of the file, a SSH account is required and a special command is run to make it function. 

·         Replace the mysqluser with the username created by you while the statement of mysqldb will be substituted with the database of the sql created. While the last statement of dbfile.sql will be replaced with the name of the respective sql dump file location.
·         A password will be needed for the necessary action and once it matches with the system, it will immediately load the data. Any error in the dump file path will result in failure in uploading of the file.

Export data for MySQL

·         Exporting the data is convenient when compared to the steps followed for importing. Yet the first step for both the tasks remains the same as one need to create the SSH account.

·         Once the SSH account is generated we will take the same example of the previous statement. The command that has been used to initiate the process earlier. 

·         The next step is to provide the username and password to the system that will further helps in replacing the required statement. 

·         As soon as the password matches with the system, there will be a file created that contains the data on the home directory. Further FTP can be sued in order to download the given file. 

·         If the file is not to be used again after downloading, it is highly recommended to delete it on order to not to be used for the server in future.
What is MySQL?

MySQL is the best source to provide database system working as a server and further provide access to other databases. SQL is the abbreviation of Structured Query Language. In simple words, MySQL helps in creating a structural database on the web for sake of either storing data or an access to automotive procedures.  With the help of such system one can create a number of magnificent projects on the web. MySQL is also one of the open sources that are free to use as it is licensed with general public license GPL. The system is supported by the web host and is further associated with the Linux servers.

How it is used?

MySQL is one of the widely used choices for creating the database on the web. Some of the renowned sites have used it as the database management system that includes YouTube, twitter and Facebook. The choice of the system works as a database to be used in web applications and is considered one of the major components of LAMP. MySQL is although a bit complex in use but easy to be built and can be manually installed. After special customizations it is installed from binary package. Once the system is installed after simple steps, system often require configuration to adjust further settings related to security.

In what way it is better than other system?

The system provides the multiple storage engines in which one can manually select the efficient storage for the web use. The system provides many features storage engines that each carries its own features. While creating the table on the web one use the complicated statements of MySQL for the efficient working. Once the tables are created the major part of the project is done, as the speed of the system as well as reliability is much standardized when compared to other systems. The system works best when a webpage is receiving a record number of hits each day.

The tables of the system provide the real characters of the data type that provide convenience in use. When used LongText data type, one can use billions of text characters, while the Longblob data type provides the functional advantage of holding many characters at the same time. The feature of Bigint data type provides the ultimate storage of countless digits used by the multi user. These features are considered to be the major reason behind the use of the system by many renowned websites that receives a record number hits by the user each day.

As MySQL is free to use being licensed with GPL, the support for the use of the system can be obtained from the manual available on the official website while further support is also available on the wide level at many forums and IRC channels. More advanced support is provided by ORACLE on paid services. Many versions of the system are released and there are further advanced system ready to be released due to the wide use of the system by many experts.
Most Common Shell Commands

Here we are going to discuss a few common shell commands that are being used by the programmers to enable different functions. Beginners are confused about the set of commands that can be used and the command box through which they can execute their commands. All of the shell commands use s sensible and a logical pattern to be executed. All of the shell commands are very short and only include three or four letters. Shell commands that are used frequently have been shortened to ease their usage criteria. Now we will describe a few simple shell commands that will get you going.

·         Man command

Also known as manual command, it is used to help users with different problems that can be faced while using Linux operating system. It is a built in command and needs not to be modified. The man commands pages are not the standalone guidelines for the beginners but can be used as a reference to mix the reference material which you learned somewhere else.

·         Info command

Info command is a very useful command, which is also used as a reference source for gaining help in different matters of Linux operating system.

1.      Troubleshooting suggestions and GNU information can be gained with the help of info command. It is somewhat different from man command as in info command you can make use of the hyperlinks for easy and secure browsing.

2.      You can access the required material easily as there are several shortcuts available for scrolling through different pages.

·         Date command

By looking at the name of this command you will get an idea about the working of this command. When you enter this command on your system you will come to know about the current date and time on your system.  If you use cal command along with date command it will show the calendar. You can look into the calendar of the current month or choose a special date where the calendar can take you to.

·         Is command

Is command is a basic command that will display the different contents which are present in a directory that you have chosen already. It means that you will be able to see all of the files which are present in a specific directory with the help of this simple command. This command has different switches that can be used to modify its functionality and behavior. You can use different commands with the basic Is command to get more detail and description of the content which is present in the directory, or even a specific directory for which you are looking. Hidden files in any directory can also be viewed if you use another command with the basic Is command.

·         Cat command

Cat command can be used for viewing all of the text which is present in any simple file. This simple command comes handy if you are dealing with basic text files and want to see the text which is present in these files.

All of these commands are quite simple and can be placed to execute different actions according to your requirements.

Overview of phpMyAdmin

PhpmyAdmin can be described as the most popular application, which is being used for the MySQL database management. Basically it is a free management tool that has been developed in PHP and it is a very useful tool. As with the help of this application you can easily export, import, delete, drop, alter or create a MySQL database table. Not only this, but you can also run various MySQL queries, check tables, optimize, repair, execute different database commands and even change collation. 
·         The different unique features of PhpMyAdmin are:
1.      It supports a user friendly interface for different web based applications
2.      As told above it works as a support for many MySQL functions which include dropping, creating, browsing, copying and altering different databases, views, indexes, tables and fields, executing MySQL queries, managing the stored functions and procedures.
3.      Importing data from the SQL and CSV files
4.      Exporting data to different formats including the XML, SQL, PDF, CSV, IEC/ISO 26300 – LATEX, Spreadsheet and Open Document Text and MS Word, MS Excel
5.      Searching globally in any database or a possible subset of it
6.      Several more features

·         Requirement of PhpMyAdmin
There are several blogs, making use of the export and import tools in the WordPress to handle different requirements of their websites. In case of an emergency and to repair your blog you might need the WP-DB-Backup tool. But for the backup of your data you will require the phpMyAdmin. Importance of phpMyAdmin can be judged from that factor that it helps in handling the MySQL server, as all of the programs are basically series of different MySQL and databases which manage them. We can describe SQL as the main language that is being inside different databases. So the important fact over here is that phpMyAdmin allows handling different databases in a very easy manner. phpMyAdmin is basically a PHP script that allows users to interact directly with their MySQL database.  Raw data stored in MySQL database can be accessed through the phpMyAdmin facility easily.  
·         Location of phpMyAdmin
To locate your phpMyAdmin, you need to login to the back office or the cPanel. After you login you will see different boxes where similar programs are being grouped together. You have to select the box which shows databases and there you will be able to see the phpMyAdmin. Host control panels like Plesk and cPanel might have the phpMyAdmin installed earlier, so there is not much work left to do. Basically it is linked with the database page and to make sure, it is properly linked or not, you can ask your host for the availability.
·         Location of database
After accessing you can click on Databases which is located under the localhost or the MySQL. If you have several databases you will see a list of different databases. It depends on you, which one you actually need and then you can click on it.
You must keep in mind that phpMyAdmin allows direct interaction with the different databases, so it means any changes you are going to make will take an immediate effect. You cannot modify the changes once they are made in the database, so always work with caution while using both of the elements together. 
Setting up Master MySQL Server

Setting up a master MySQL server is an easy process. But for the beginners this process might get tricky as they do not know how to place different commands. Apart from knowing the exact and accurate commands required for executing different actions they also need to be typed correctly, as any wrong command will not let a required action to take place. It will actually prevent MySQL from carrying out the action further in case a wrong command has been detected. So it is important to learn and enter the exact commands for this purpose.

1.      To initiate the process first of all you need to install MySQL on the Windows Dedicated server

2.      After installing MySQL you can start the program and enter the required commands

3.      You will start MySQL with the help of Windows Command Line

4.      To make this process successful you need to know the following steps

Note: the steps that we are going to discuss over here can be used easily on any version of Windows, as there are no special instructions or guidelines that require MySQL to become operational on Windows.

·         Getting started
First of all open the windows command box which is also called as the DOS Windows. After you have opened the console window you can start MySQLD server with the help of special commands.
The exact path of the MySQLD server will actually depend on the server of Windows and on the path where MySQL has been installed. You can also stop the functioning of MySQL sever by entering a simple command.

1.      It is important to note that if there is a password required then you need to bring the p(password) option on the mysqladmin, which will allow your access to the root use account.

With the help of simple commands MySQL administrative utility will come into action and inform the mysqladmin server, to establish a link with the main server and as a result it is ordered to shut down or discontinue its activity.

2.      It is important to note that, the users accessing the MySQL grant system are basically independent and free from the influence of any other users that login Windows for different purposes.

·         MySQL web server
In case you are facing difficulties in initiating the MySQL server then you need to have a look at the error log, which will tell you about the different errors that are stopping the action. You will also know if any action has been dropped by the server due to certain limitations and this will eventually help you out in determining the actual problem. All of the errors are recorded in the system files and you can easily access them at any time.
There is another process for initiating MySQL server with the help of mysqld console. By using this command you will be able to successfully run the program and start the server. By entering this command your screen will display some useful information, which will serve as a guideline to prevent further errors from taking place.

Simple MySQL commands

MySQL is a database system used by many sites in order to maintain a functional database for web use. The system is easy to install and further used by doing simple configuration to the system.  Below are some of the simple commands to be used in MySQL that further provides easy functioning in the system.

The commands used on MySQL helps in the direct interaction with the database on the server. Such commands are most of the time useful in sudden requirements of the application in order to create a database or the tables related to it. By loading the sql script one is ready to create the given requirements. For accessing any command line one has to execute the command by entering the password.

Some simple commands in MySQL

·         For creating the users of the table simple commands are useful.

·         In case of user nickname are required only with their concerned favorite number, some easy to use commands can do the desired task.

·         For the nicknames availed if provided with pair of socks that are less than 10 and if the favorite number specified is more than 100 then the command will specify the detail in it.

·         For inserting the row of data into the system table, an easy to use command of MySQL will provide the best solution.

·         For if the row of the data has the password missing the command is somewhat same as the one recommended for creating the password for the user table.

Common statements to be used:

For more complex type of commands there are different statements and clauses are used that helps in generating the commands. Some of the mostly used statements and clauses are


An example of complete MySQL command:

Apart from these famous statements there is still much to learn regarding the string functions of the system as well as functional aspect of date and time. To explain more about some simple commands let us take an example of a complete set of command performing the desired function.

·         Replacing the statements

The action of replacing the item is performed in a row. The action of replacement is more dependent on the id as in order to REPLACE effectively one has to add the column of PRIMARY. Once the primary column has been set as id the system will be familiar as to which row the necessary action has to be performed.  Consequently if the id is not specified system will have no information of which row one has intended to bring changes.

In the statements where id is not specified to the system it will act more like an INSERT action. In simple words if the primary row is specified the changes will be made only in concerned row.

What is Shell Scripting?

For those who do not have a programming background must be unaware of the basics of different operating systems and scripting. Shell scripting can be confusing for the beginners but with the passage of time when you start learning different things of this language, it will become clearer to you. You might find it interesting to learn and apply later once you are aware of the actual functioning of this script.

·         Basic intro

Shell script can be described as a text file, which contains string of different commands that have been placed in a particular sequence. Once the script is allowed to run all of the commands are executed which are present in that file. Shell, basically refers to a special command line interface which is used for communicating with Linux kernel. Nowadays different shells are being used and the most common shells are csh also known as the C Shell, ksh also known as the Korn Shell, sh which is also known as Bourne Shell and Bourne Again bash or shell.

You will experience different scenarios while making a script using a shell. The different cases can be:
1.      Supporting and existing script while you are looking forward to make few amendments
2.      Automating systems setup procedure while you are installing oracle.

If you pass through any of the above stated conditions you will need to use a special script that will help in determining the actual state of the different requirements of operating system. You have to keep in mind that these requirements must be met before you plan to install the software.

·         Linux
Bash can be described as the most common shell that is being used under Linux. The other name given to this shell is Bourne Again Shell, which is very first name, awarded to this shell. In fact there are several other shells available for using with Linux and are easily compatible with this operating system. But most of the experts recommend using this shell, as it will help in increasing the chances of your operating systems compatibility with other similar operating systems.

·         UNIX

While you are using UNIX, it will allow to string different commands together and then execute them as a set of UNIX commands even when the set of commands which needs to be executed has not been completed. The process of executing a script is made a lot faster by this process. Shell scripting done under UNIX makes it quite easy for the programmers to understand your code. These types of scripts can be shared easily at any corner of the world on the systems that have UNIX f

·         Script for windows

Windows also allows its users to develop certain scripts and then use them for generating and controlling different types of programs. In Windows shell scripting is basically done to generate the logon scripts. These scripts then are used for configuring the different settings of the Windows that a user will prefer after logging in. it is a unique feature that enables programs to use shell scripting in Windows also.

What is phpMyAdmin?

phpMyAdmin is a script made in PHP that is basically used for providing the interaction of the user with the MySQL databases. Wordpress actively works in order to store the data in MySQL database and within the wordpress site the information is generated by the interaction of the database. The tool can be used for various activities that could include creation, modification of databases, execution of SQL statements and management of users and their permissions. The tool was first released in 1998 and since then has introduced many updated compatible versions.

Important features of the phpMyAdmin:

The program actively works for the MySQL while its features deliver the best services. Web interface is the main feature of the program while it is directly involved in working of managing the MySQL database. The program also helps in importing the data from SQL as well as CSV. Another exciting feature of the program is that it can export data in variety of formats. The program administers on multiple servers and further creates complex queries by suing the QBE. The set of function in the program also provide efficient services in transforming the stored data in various other formats. The program also works for the creation of graphics for the database layout.

Uses of phpMyAdmin:

The handy program is performing various important functions that have the major benefits for the user in various ways. The program performs commendable operations related to maintenance of tables, editing required and back up information. The program deals with the various functions related to the handling of MySQL database that could involve deleting, creating modifying and editing.

Access to the program:

Some of the hosting control panels have php program already installed in it and one has to do zero effort in order to take access to it. The link to the program is normally available at the database page and can be asked from the host site to give the access. While the manual download of the program is also available that can be installed from the project page of phpMyAdmin. One of the important considerations for the user is the careful handling of the program, as it provides the direct access of handling the database. Any misuse or mishandling will lead to trouble as the program doesn’t provide any undelete or undo options. It is convenient to exercise with caution in order to deal with database. 

Summarizing the concept of phpMyAdmin, the browser based application is designed to provide the maximum help in managing MySQL database. Apart from using the traditional method of command prompt the program is designed to deliver the services by using the browser. The program itself is free of cost but there could be some charges that one has to pay for MySQL database. Data can also be imported in the program with few simple steps. The data of MySQL cannot be directly deleted with the help of program but the program instead helps in making modification and deleting in tables.