Master

1. Configure master to listen on all ip addresses (pico /etc/mysql/my.cnf)

#bind-address = 127.0.0.1


Comment out this line or remove it

2. Configure server id, log file location and which databases are allowed to be replicated (pico /etc/mysql/my.cnf)

server-id = 1
log_bin = /var/log/mysql/mysql-bin.log
binlog_do_db = {database}


Replace {database} with the one you would like to replicate

3. Restart MySql

/etc/init.d/mysql restart


4. Create a user and allow it to act as slave for this server (mysql -u root -p)

GRANT REPLICATION SLAVE ON *.* TO {username}@'{ip}' IDENTIFIED BY '{password}';
FLUSH PRIVILEGES;


{username} = Your preferred username
{password} = Your password
{ip} = IP address of the slave system or % to allow all ip addresses

5. Show current log file and position (mysql -u root -p)

SHOW MASTER STATUS;


This will return something like this:

+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000004 | 2751 | {database} | |
+------------------+----------+--------------+------------------+


Keep the file name and position. It will be used later on the slave

6. Transfer data from the master to the slave

You can do this using various methods including exporting and importing using phpMyAdmin, creating a database dump from the master and import to the slave and "LOAD DATA FROM MASTER".

Slave

1. Configure this server to be a slave for the master MySql server (pico /etc/mysql/my.cnf)

server-id = 2
master-host = {master_ip}
master-user = {username}
master-password = {password}
master-connect-retry = 60
replicate-do-db = {database}


{master_ip} = The ip of the master server
{username} = The username you provided earlier on the master server
{password} = The password you provided earlier on the master server
{database} = The database you want to replicate

2. Restart MySql

/etc/init.d/mysql restart


3. Final configurations to make the slave replicate with the master (mysql -u root -p)

SLAVE STOP;
CHANGE MASTER TO MASTER_HOST='{master_ip}', MASTER_USER='{username}', MASTER_PASSWORD='{password}', MASTER_LOG_FILE='{log_file}', MASTER_LOG_POS={log_position};
SLAVE START;


{master_ip} = The ip of the master server
{username} = The username you provided earlier on the master server
{password} = The password you provided earlier on the master server
{log_file} = Log file name from the master (ex. mysql-bin.000004)
{log_position} = Log position from the master (ex. 2751)

mysqldump -h localhost -u {username} -p --all-databases > database_dump.sql


Replace {username} with your MySql username.

You can also export a single database using this command:

mysqldump -h localhost -u {username} -p {database} > database_dump.sql


Replace {username} with your MySql username and {database} with the database you are going to export.

2. Move the database_dump.sql file to your destination server. You could grab it from FTP server or put it on a public web location and use wget on the destination server to receive the file. This process it outside the scope of this tutorial.

3. Import the dump to the destination MySql server by running the following command:

mysql -h localhost -u {username} -p < database_dump.sql


Replace {username} with your MySql username.

If you are only exporting a single database, use this command instead:

mysql -h localhost -u {username} -p {database} < database_dump.sql


Replace {username} with your MySql username and {database} with the database you are going to export.

1. Install packages

apt-get install postgresql postgresql-client


2. Create a user

// Change to the postgres linux user and create the actual user
su postgres
createuser user1

// Using the default template allow the user and set password
psql template1
alter user aip password 'password'

That's actually all you need to install and create the firt user. Follow the remaining steps to allow remote access to the PostgreSQL server.

3. Enable TCP/IP connections to the server to be able to manage by a remote client. Edit this line in the main PostgreSQL config file (pico /etc/postgresql/7.4/main/postgresql.conf):

tcpip_socket = true


If managing on Windows I recommend using the EMS SQL Manager

4. Allow connections from you IP address or a range (pico /etc/postgresql/7.4/main/pg_hba.conf)

host all all 85.234.0.0 255.255.0.0 trust


Using this code I enabled the 85.234.0.0/255.255.0.0 IP range to connect to the server. Make sure you allow as few IP addresses as possible.

You're all set. Make sure the port 5432 is open in all firewalls to be able to remote manage the server.