Magento - Admin login problem after fresh installation

Many times it happens, that after fresh installation of magento we are unable to login with admin. Try the solution for the same.

1) Edit varien.php which located in /[Magento_Dir]/app/code/core/Mage/Core/Model/Session/Abstract/


2) Find out the below pattern & comment last three lines.

session_set_cookie_params(

$this->getCookie()->getLifetime(), $this->getCookie()->getPath()//, //$this->getCookie()->getDomain(), //$this->getCookie()->isSecure(), //$this->getCookie()->getHttponly()

);

 3) Now try to login with admin user

Step-by-step configuration of MySQL Replication

Environment:

Master : 192.168.0.2
Slave : 192.168.0.3

MASTER CONFIGURATION

1) Login to MySQL with root user & Create a user for replication.
 
GRANT REPLICATION SLAVE ON *.* TO 'slave_user'@'%' IDENTIFIED BY 'your_password';
FLUSH PRIVILEGES;

2) Edit your my.cnf on master & add below lines in [mysqld] section

log-bin = /home/mysql/logs/mysql-bin.log
binlog-do-db=my_database
server-id=1

3) Restart master server

/etc/rc.d/init.d/mysqld restart



Configuring the Slave

1) Edit my.cnf

server-id=2
master-host=128.0.0.1
master-connect-retry=60
master-user=slave_user
master-password=slave_password
replicate-do-db=my_database

2) Restart MySQL Service

/etc/init.d/mysqld restart



3) Again login to mysql On the Master...

mysql > FLUSH TABLES WITH READ LOCK;

mysql > SHOW MASTER STATUS;

+---------------------+----------+-------------------------------+------------------+
 | File                          | Position | Binlog_Do_DB     | Binlog_Ignore_DB |
+---------------------+----------+-------------------------------+-----------------+
 | mysql-bin.000001   | 98           | my_database       |                  |
+---------------------+----------+-------------------------------+------------------+

You need this info while starting slave So copy it somewhere.


5) Take a DBdump from master & copy it to slave

6) login to MySQL On the Slave

mysql > stop slave;
mysql > CREATE DATABASE `my_database`;

7) Import Ur master dump

8) Login to MySQL on slave.

mysql > CHANGE MASTER TO MASTER_HOST='192.168.0.2', MASTER_USER='slave_user', MASTER_PASSWORD='slave_password', MASTER_LOG_FILE='mysql-bin.000001', MASTER_LOG_POS=98;

slave start;

9) Back on the Master, log in to mysql & unlock the tables.
mysql > unlock tables;

10) Here we completed mysql replication configuration Now change any field in "my_database" on Master server, It will reflect on slave server.