Delete and uninstall MySQL from Linux

Because redhat Enterprise 5 comes with a mysql version, skip this step if you did not select mysql installation before installing linux, Because I installed it now and uninstall it as follows:
 
A. Find the installed myslq version:
# Rpm-qa | grep mysql (note the case sensitivity. If mysql doesn't work, change it to MySQL)
 
Appears:
[Ysong @ sva_rec mysql] $ rpm-qa | grep mysql
Mysql-5.0.45-7.el5
Libdbi-dbd-mysql-0.8.1a-1.2.2
Mysql-5.0.45-7.el5
Mysql-server-5.0.45-7.el5
Mysql-connector-odbc-3.51.12-2.2
 
 
Data in/var/lib/mysql and/etc/my. cnf will not be deleted after uninstallation. If it is determined that it is useless, it will be deleted manually.
Rm-f/etc/my. cnf
Rm-rf/var/lib/mysql
 
 
Then, enter the following command:
[Ysong @ sva_rec mysql] $ sudo yum-y remove mysql-5.0.45-7.el5
Password:
Loading "security" plugin
Loading "rhnplugin" plugin
This system is not registered with RHN.
RHN support will be disabled.
Setting up Remove Process
Resolving Dependencies
--> Running transaction check
---> Package mysql. x86_64. 0.45-7. el5 set to be erased
--> Processing Dependency: libmysqlclient. so.15 () (64bit) for package: dovecot
--> Processing Dependency: libmysqlclient. so.15 () (64bit) for package: mysql-server
--> Processing Dependency: libmysqlclient. so.15 () (64bit) for package: mysql-connector-odbc
--> Processing Dependency: libmysqlclient. so.15 () (64bit) for package: perl-DBD-MySQL
--> Processing Dependency: libmysqlclient. so.15 () (64bit) for package: libdbi-dbd-mysql
--> Processing Dependency: libmysqlclient. so.15 (libmysqlclient_15) (64bit) for package: dovecot
--> Processing Dependency: libmysqlclient. so.15 (libmysqlclient_15) (64bit) for package: mysql-server
--> Processing Dependency: libmysqlclient. so.15 (libmysqlclient_15) (64bit) for package: mysql-connector-odbc
--> Processing Dependency: libmysqlclient. so.15 (libmysqlclient_15) (64bit) for package: perl-DBD-MySQL
--> Processing Dependency: libmysqlclient. so.15 (libmysqlclient_15) (64bit) for package: libdbi-dbd-mysql
--> Processing Dependency: libmysqlclient_r.so.15 () (64bit) for package: mysql-connector-odbc
--> Processing Dependency: libmysqlclient_r.so.15 () (64bit) for package: mysql-server
--> Processing Dependency: libmysqlclient_r.so.15 () (64bit) for package: MySQL-python
--> Processing Dependency: libmysqlclient_r.so.15 (libmysqlclient_15) (64bit) for package: mysql-connector-odbc
--> Processing Dependency: libmysqlclient_r.so.15 (libmysqlclient_15) (64bit) for package: mysql-server
--> Processing Dependency: libmysqlclient_r.so.15 (libmysqlclient_15) (64bit) for package: MySQL-python
--> Processing Dependency: mysql for package: libdbi-dbd-mysql
--> Processing Dependency: mysql = 5.0.45-7. el5 for package: mysql-server
--> Processing Dependency: mysql for package: MySQL-python
---> Package mysql. i386. 0.45-7. el5 set to be erased
--> Running transaction check
---> Package mysql-server.x86_64. 0.45-7. el5 set to be erased
---> Package MySQL-python.x86_64. 2.1-1 set to be erased
---> Package libdbi-dbd-mysql.x86_64 0: 0. 8.1a-1.2.2 set to be erased
---> Package perl-DBD-MySQL.x86_64 0: 3. 0007-1.fc6 set to be erased
---> Package mysql-connector-odbc.x86_64. 51.12-2.2 set to be erased
---> Package dovecot. x86_64. 0.7-2. el5 set to be erased
--> Finished Dependency Resolution

Dependencies Resolved

========================================================== ============================================
Package Arch Version Repository Size
========================================================== ============================================
Removing:
Mysql x86_64 5.0.45-7. el5 installed 7.5 M
Mysql i386 5.0.45-7. el5 installed 7.3 M
Removing for dependencies:
MySQL-python x86_64 1.2.1-1 installed 288 k
Dovecot x86_64 1.0.7-2. el5 installed 3.7 M
Libdbi-dbd-mysql x86_64 0.8.1a-1.2.2 installed 55 k
Mysql-connector-odbc x86_64 3.51.12-2.2 installed 420 k
Mysql-server x86_64 5.0.45-7. el5 installed 22 M
Perl-DBD-MySQL x86_64 3.0007-1. fc6 installed 328 k

Transaction Summary
========================================================== ============================================
Install 0 Package (s)
Update 0 Package (s)
Remove 8 Package (s)

Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Erasing: mysql-server ######################### [1/8]
Warning:/var/log/mysqld. log saved as/var/log/mysqld. log. rpmsave
Erasing: MySQL-python ######################### [2/8]
Erasing: mysql ######################## [3/8]
Erasing: libdbi-dbd-mysql ######################### [4/8]
Erasing: perl-DBD-MySQL ######################### [5/8]
Erasing: mysql-connector-odbc ######################### [6/8]
Erasing: dovecot ######################### [7/8]
Erasing: mysql ######################## [8/8]

Removed: mysql. x86_64. 0.45-7. el5 mysql. i386. 0.45-7. el5
Dependency Removed: MySQL-python.x86_64 0: 1. 2.1-1 dovecot. x86_64. 0.7-2. el5 libdbi-dbd-mysql.x86_64 0: 0. 8.1a-1.2.2 mysql-connector-odbc.x86_64 0: 3. 51.12-2.2 mysql-server.x86_64 0: 5. 0.45-7. el5 perl-DBD-MySQL.x86_64. 0007-1.fc6
Complete!
[Ysong @ sva_rec mysql] $
 
 
OK. At this point, mysql in Linux has been completely uninstalled. Then, enter:
[Ysong @ sva_rec mysql] $ rpm-qa | grep mysql
[Ysong @ sva_rec mysql] $
 
The system has no mysql service;
 
 
[Ysong @ sva_rec mysql] $ netstat-nat
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
Tcp 0 0 127.0.0.1: 2208 0.0.0.0: * LISTEN
Tcp 0 0 0.0.0.0: 139 0.0.0.0: * LISTEN