Difference between revisions of "MySQL/MariaDB Setup"

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  BEFORE Ent 7
 
  BEFORE Ent 7
 
  # service mysqld start
 
  # service mysqld start
 
===  mySQL Quick Reference ===
 
*List Databases*
 
  mysql> show databases;
 
 
*List Tables*
 
  mysql> show tables;
 
 
*Change Passwords*
 
  # mysqladmin -u root password 'new-password'
 
Note: the mysqladmin command should be run from a shell script, so as to not have this critical password exposed in the command history - make sure to delete the shell script after running
 
 
*Delete Database*
 
  mysql> drop database test;
 
 
*Creating a new DB and assigning permissions*
 
 
Command line/scripted
 
  # mysqladmin -p create wikidb
 
  # echo "grant index, create, select, insert, update, delete, alter, lock tables on wikidb.* to 'wikiuser'@'localhost' identified by 'password';" | mysql -p
 
Note: the echo command should be run from a shell script, so as to not have a critical password exposed in the command history - make sure to delete the shell script after running
 
 
mySQL command line - note: this is added to the mysql command history (not a good idea to leave the password exposed):
 
  # mysql -p
 
  mysql> create database wikidb;
 
  mysql> grant index, create, select, insert, update, delete, alter, lock tables on wikidb.* to 'wikiuser'@'localhost' identified by 'password';
 
 
*Delete From Table*
 
*Table Structure*
 
*View Data (Some Query Examples)*
 

Latest revision as of 14:16, 19 May 2017

1. install packages

ENT 7
# yum install mariadb-server mariadb
BEFORE Ent 7
# yum install mysql-server mysql

2. set to start at bootup

ENT 7
# systemctl enable mariadb
BEFORE Ent 7
# chkconfig mysqld on

3. start mysql server

ENT 7
# systemctl start mariadb
BEFORE Ent 7
# service mysqld start

4. secure mysql; setup root password, disallow root remote access, remove test database

# mysql_secure_installation
answer Y to all of the questions and set root password  (sometimes same as OS root pw - NOT A GOOD IDEA!)
OR (see Changing Passwords for issues before running)
# mysqladmin -u root password 'new-password'
# mysql -p mysql
mysql> delete from user where User!='root';
mysql> delete from user where Host!='localhost';
mysql> delete from db;
mysql> drop database test;

5. remove additional/unneeded root acct

# mysql -p
mysql> use mysql;
mysql> delete from user where Host='127.0.0.1';

6. move database directory
6a. stop mysql first

ENT 7
# systemctl stop mariadb
BEFORE Ent 7
# service mysqld stop

6b. move db directory to a partition that has space (/home or the partition which has space allocated for applications)

# cd /var/lib ; mv mysql /home/ ; ln -s /home/mysql

6c. start mysql

ENT 7
# systemctl start mariadb
BEFORE Ent 7
# service mysqld start