mysql administration with command

1. Mohd Yasin Abd Karim
yasin@teras-solution.com

2.  Configuring
 Monitoring, Starting & Stopping
 Managing Users and Connection
 Performing backups
 Others

4.  Mysqladmin or mysql
 GUI
◦ MySQL Administrator
◦ MySQL Workbench
◦ phpMyAdmin

5.  OS packages place files in many areas and
varies
◦ e.g. /usr/lib, /var/lib, /var/log, /etc
 Source rpm, yum, .tar.gz, exe
 Online/repo update
◦ #yum update mysql-*
 For Ms Windows Environment
C:>cd localmysqlbin
C:localmysqlbin>
Local folder normally Program Files folder

6.  Start MySQL process before create database
 To configure MySQL start at boot time
#chkconfig mysqld on
 Or using GUI tools such as OS Services
Management

7.  After boot time using the services commands
#service mysqld start
#service mysqld stop
#Service mysqld restart
 Remember to restart mysqld process every
time after configuration changed

8.  to know whether your MySQL server is alive
#pgrep mysqld
 Should get response process ID numbers
 Or
#mysqladmin –u root –p ping
 The "mysqld is alive" message tells you that
your MySQL server is running ok. If your
MySQL server is not running, you will get a
"connect ... failed" message.

9.  my.cnf
◦ Watch out for /etc/my.cnf, /etc/mysql/my.cnf
 To get the server listening on all
interfaces, use 0.0.0.0 as the bind address.
i.e.:
--bind-address=0.0.0.0

10.  Configured to listen TCP/IP Port (default
3306)
 Additional Instances
◦ Different Ports
◦ Different IP‟s using default Port
 Local connection using Socket

11.  Login to MySQL server
#mysql –h hostname –u root -p
 Create a database
msql> create database [databasename];
 List all databases on the MySQL server
msql> show databases;

12.  Swicth to a database
msql> use [db_name];
 To see all the tables in the db
msql> show tables;
 To delete a db
msql> drop database [databasename];

13.  To see database‟s field formats
msql> describe [table name];
 To delete a table
msql> drop table [table name];
 Show all data in a table
msql> SELECT * FROM [table name];

14.  SHOW TABLES;
 SHOW WARNINGS;
 SHOW STATUS; FLUSH STATUS;
 SHOW VARIABLES;
 SHOW VARIABLES LIKE „%size%‟;
 SHOW VARIABLES LIKE „sort_buffer_size‟;
 SHOW GLOBAL STATUS;

15.  to check version number of your MySQL
server
C:localmysqlbin>mysqladmin -u root version

16.  According to the /etc/my.cnf
 Usually located in subdirectory
/var/lib/mysql/ directory
 Example : test database
◦ /var/lib/mysql/test

17.  Root or superuser account is used to create
and delete database
 New installation MySQL set password
#mysqladmin –u root password new-password

18.  to know what else you can do with
"mysqladmin", you should run the "-?"
#mysqladmin –?

19.  Creating new user
# mysql -u root -p
mysql> use mysql;
mysql> INSERT INTO user (Host,User,Password)
VALUES('%','username',PASSWORD('password'));
mysql> flush privileges;

20.  Change a user password from unix shell
# mysqladmin -u username -h hostname.org -p password
'new-password'
 Change user password from MySQL prompt
# mysql -u root -p
mysql> SET PASSWORD FOR 'user'@'hostname' =
PASSWORD('passwordhere');
mysql> flush privileges;

21.  Update root password
# mysqladmin -u root -p oldpassword newpassword
 Allow the user “bob” to connect to server
from localhost using password „passwd‟
# mysql -u root -p
mysql> use mysql;
mysql> grant usage on *.* to bob@localhost identified by
'passwd';
mysql> flush privileges;

22.  Give user privileges for a db.
# mysql -u root -p
mysql> use mysql;
mysql> INSERT INTO db
(Host,Db,User,Select_priv,Insert_priv,Update_priv,Delete_priv
,Create_priv,Drop_priv) VALUES
('%','databasename','username','Y','Y','Y','Y','Y','N');
mysql> flush privileges;
or
mysql> grant all privileges on databasename.* to
username@localhost;
mysql> flush privileges;

23.  To update info already in table
mysql> UPDATE [table name] SET Select_priv = 'Y',Insert_priv
= 'Y',Update_priv = 'Y' where [field name] = 'user';
 Delete a rows from table
mysql> DELETE from [table name] where [field name] =
'whatever';
 Update database permissions/privileges
mysql> flush privileges;

24.  Dump all databases for backup
# mysqldump -u root -ppassword --opt >/tmp/alldatabases.sql
 Dump one database for backup
# mysqldump -u username -ppassword --databases
databasename >/tmp/databasename.sql
 Dump a table from a database
# mysqldump -c -u username -ppassword databasename
tablename > /tmp/databasename.tablename.sql

25.  Restore database / table from backup
# mysql -u username -ppassword databasename <
/tmp/databasename.sql

26.  Example
mysql> create table [table name] (personid int(50) not null
auto_increment primary key,firstname varchar(35),middlename
varchar(50),lastnamevarchar(50) default „yasin');
mysql> CREATE TABLE [table name] (firstname
VARCHAR(20), middleinitial VARCHAR(3), lastname
VARCHAR(35),suffix VARCHAR(3),officeid VARCHAR(10),userid
VARCHAR(15),username VARCHAR(8),email VARCHAR(35),phone
VARCHAR(25), groups VARCHAR(15),datestamp DATE,timestamp
time,pgpemail VARCHAR(255));

27.  yasin@teras-solution.com