change data location of postgres and mysql on ubuntu 13.10

well, just a simple note how to change default data location of mysql and postgres on ubuntu saucy salamander (13.10)

 in this case, i show you to make /home/user/data_mysql and /home/user/data_postgres as default location of both.

changing data postgres 9.3 on ubuntu 13.10

febru@sevilla:~$ mkdir data_postgres
febru@sevilla:~$ sudo chown -R postgres:postgres data_postgres
febru@sevilla:~$ sudo pg_dropcluster --stop 9.3 main
febru@sevilla:~$ sudo pg_createcluster -d ~/data_postgres 9.3 main
Creating new cluster 9.3/main ...
  config /etc/postgresql/9.3/main
  data   /home/febru/data_postgres
  locale en_US.UTF-8
  port   5432
febru@sevilla:~$ sudo /etc/init.d/postgresql start

change data location of mysql 5.5 on ubuntu 13.10

febru@sevilla:~$ mkdir data_mysql
febru@sevilla:~$ sudo chown -R mysql:mysql data_mysql
febru@sevilla:~$ sudo /etc/init.d/mysql stop
 * Stopping MySQL database server mysqld                                                                                                                                                                                   [ OK ]
febru@sevilla:~$ sudo cp -R -p /var/lib/mysql data_mysql
febru@sevilla:~$ sudo vim /etc/mysql/my.cnf

change location to

data_dir = /home/febru/data_mysql

febru@sevilla:~$ sudo vim /etc/apparmor.d/usr.sbin.mysqld 

change 

-  /var/lib/mysql/ r,
-  /var/lib/mysql/** rwk,
+  /home/febru/data_mysql/ r,
+  /home/febru/data_mysql/** rwk,

febru@sevilla:~$ sudo /etc/init.d/apparmor reload
 * Reloading AppArmor profiles                                                                                                                                                                                                    Skipping profile in /etc/apparmor.d/disable: usr.bin.firefox
Skipping profile in /etc/apparmor.d/disable: usr.sbin.rsyslogd
                                                                                                                                                                                                                           [ OK ]
febru@sevilla:~$ sudo /etc/init.d/mysql start
 * Starting MySQL database server mysqld      

if you get problem after restarting your computer, do this :

mysql can not start after reboot 

sudo tail -f /var/log/mysql/error.log

if you get :

[ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist 

do this :

sudo  mysql_install_db -user=mysql -ldata=/home/febru/data_mysql               

Read more ...