centos7安装MariaDB教程，分享给大家
1.centos7现状：
　　新系统无法再使用yum install mysql-server来安装mysql，因为已使用mariadb代替mysql。
2.安装mariadb：

1. [root@localhost ~]# yum -y install mariadb*
   
2. Loaded plugins: fastestmirror
   
3. Loading mirror speeds from cached hostfile
   
4. * base: mirrors.linode.com
   
5. * extras: mirrors.linode.com
   
6. * updates: mirrors.linode.com
   
7. Resolving Dependencies
   
8. --> Running transaction check
   
9. ---> Package mariadb.x86_64 1:5.5.37-1.el7_0 will be installed
   
10. ---> Package mariadb-bench.x86_64 1:5.5.37-1.el7_0 will be installed
    
11. ---> Package mariadb-devel.x86_64 1:5.5.37-1.el7_0 will be installed
    
12. ---> Package mariadb-embedded.x86_64 1:5.5.37-1.el7_0 will be installed
    
13. ---> Package mariadb-embedded-devel.x86_64 1:5.5.37-1.el7_0 will be installed
    
14. ---> Package mariadb-libs.x86_64 1:5.5.37-1.el7_0 will be installed
    
15. ---> Package mariadb-server.x86_64 1:5.5.37-1.el7_0 will be installed
    
16. --> Processing Dependency: perl-DBD-MySQL for package: 1:mariadb-server-5.5.37-1.el7_0.x86_64
    
17. ---> Package mariadb-test.x86_64 1:5.5.37-1.el7_0 will be installed
    
18. --> Running transaction check
    
19. ---> Package perl-DBD-MySQL.x86_64 0:4.023-5.el7 will be installed
    
20. --> Finished Dependency Resolution
    
21. 
    
22. Dependencies Resolved
    
23. 
    
24. ==========================================================================================================
    
25. Package              Arch       Version           Repository     Size
    
26. ==========================================================================================================
    
27. Installing:
    
28. mariadb              x86_64      1:5.5.37-1.el7_0      updates      8.9 M
    
29. mariadb-bench           x86_64      1:5.5.37-1.el7_0      updates      385 k
    
30. mariadb-devel           x86_64      1:5.5.37-1.el7_0      updates      744 k
    
31. mariadb-embedded         x86_64      1:5.5.37-1.el7_0      updates      3.6 M
    
32. mariadb-embedded-devel      x86_64      1:5.5.37-1.el7_0      updates      7.4 M
    
33. mariadb-libs           x86_64      1:5.5.37-1.el7_0      updates      752 k
    
34. mariadb-server          x86_64      1:5.5.37-1.el7_0      updates       11 M
    
35. mariadb-test           x86_64      1:5.5.37-1.el7_0      updates      7.9 M
    
36. Installing for dependencies:
    
37. perl-DBD-MySQL          x86_64      4.023-5.el7         base        140 k
    
38. 
    
39. Transaction Summary
    
40. ==========================================================================================================
    
41. Install 8 Packages (+1 Dependent package)
    
42. 
    
43. Total download size: 40 M
    
44. Installed size: 279 M
    
45. Downloading packages:
    
46. (1/9): mariadb-bench-5.5.37-1.el7_0.x86_64.rpm                   | 385 kB 00:00:00
    
47. (2/9): mariadb-devel-5.5.37-1.el7_0.x86_64.rpm                   | 744 kB 00:00:00
    
48. (3/9): mariadb-embedded-5.5.37-1.el7_0.x86_64.rpm                 | 3.6 MB 00:00:00
    
49. (4/9): mariadb-5.5.37-1.el7_0.x86_64.rpm                      | 8.9 MB 00:00:00
    
50. (5/9): mariadb-libs-5.5.37-1.el7_0.x86_64.rpm                   | 752 kB 00:00:00
    
51. (6/9): mariadb-server-5.5.37-1.el7_0.x86_64.rpm                  | 11 MB 00:00:00
    
52. (7/9): mariadb-embedded-devel-5.5.37-1.el7_0.x86_64.rpm              | 7.4 MB 00:00:00
    
53. (8/9): mariadb-test-5.5.37-1.el7_0.x86_64.rpm                   | 7.9 MB 00:00:00
    
54. (9/9): perl-DBD-MySQL-4.023-5.el7.x86_64.rpm                    | 140 kB 00:00:00
    
55. ----------------------------------------------------------------------------------------------------------
    
56. Total                                   36 MB/s | 40 MB 00:00:01
    
57. Running transaction check
    
58. Running transaction test
    
59. Transaction test succeeded
    
60. Running transaction
    
61. Installing : 1:mariadb-libs-5.5.37-1.el7_0.x86_64                          1/9
    
62. Installing : 1:mariadb-5.5.37-1.el7_0.x86_64                            2/9
    
63. Installing : perl-DBD-MySQL-4.023-5.el7.x86_64                           3/9
    
64. Installing : 1:mariadb-server-5.5.37-1.el7_0.x86_64                         4/9
    
65. Installing : 1:mariadb-devel-5.5.37-1.el7_0.x86_64                         5/9
    
66. Installing : 1:mariadb-embedded-5.5.37-1.el7_0.x86_64                        6/9
    
67. Installing : 1:mariadb-embedded-devel-5.5.37-1.el7_0.x86_64                     7/9
    
68. Installing : 1:mariadb-test-5.5.37-1.el7_0.x86_64                          8/9
    
69. Installing : 1:mariadb-bench-5.5.37-1.el7_0.x86_64                         9/9
    
70. Verifying : 1:mariadb-test-5.5.37-1.el7_0.x86_64                          1/9
    
71. Verifying : 1:mariadb-embedded-devel-5.5.37-1.el7_0.x86_64                     2/9
    
72. Verifying : 1:mariadb-embedded-5.5.37-1.el7_0.x86_64                        3/9
    
73. Verifying : 1:mariadb-libs-5.5.37-1.el7_0.x86_64                          4/9
    
74. Verifying : 1:mariadb-bench-5.5.37-1.el7_0.x86_64                         5/9
    
75. Verifying : 1:mariadb-5.5.37-1.el7_0.x86_64                            6/9
    
76. Verifying : 1:mariadb-server-5.5.37-1.el7_0.x86_64                         7/9
    
77. Verifying : perl-DBD-MySQL-4.023-5.el7.x86_64                           8/9
    
78. Verifying : 1:mariadb-devel-5.5.37-1.el7_0.x86_64                         9/9
    
79. 
    
80. Installed:
    
81. mariadb.x86_64 1:5.5.37-1.el7_0            mariadb-bench.x86_64 1:5.5.37-1.el7_0
    
82. mariadb-devel.x86_64 1:5.5.37-1.el7_0         mariadb-embedded.x86_64 1:5.5.37-1.el7_0
    
83. mariadb-embedded-devel.x86_64 1:5.5.37-1.el7_0     mariadb-libs.x86_64 1:5.5.37-1.el7_0
    
84. mariadb-server.x86_64 1:5.5.37-1.el7_0         mariadb-test.x86_64 1:5.5.37-1.el7_0
    
85. 
    
86. Dependency Installed:
    
87. perl-DBD-MySQL.x86_64 0:4.023-5.el7
    
88. 
    
89. Complete!
    
90. [root@localhost ~]# systemctl start mariadb.service
    
91. [root@localhost ~]# systemctl enable mariadb.service
    
92. ln -s '/usr/lib/systemd/system/mariadb.service' '/etc/systemd/system/multi-user.target.wants/mariadb.servi           
    
93. ce'
    
94. [root@localhost ~]# mysql
    
95. Welcome to the MariaDB monitor. Commands end with ; or \g.
    
96. Your MariaDB connection id is 2
    
97. Server version: 5.5.37-MariaDB MariaDB Server
    
98. 
    
99. Copyright (c) 2000, 2014, Oracle, Monty Program Ab and others.
    
100. 
     
101. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
     
102. 
     
103. MariaDB [(none)]> logout
     
104.   -> exit
     
105.   ->
     
106.   -> ;
     
107. ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaD           
     
108. B server version for the right syntax to use near 'logout
     
109. exit' at line 1
     
110. MariaDB [(none)]> exit
     
111. Bye
     
112. [root@localhost ~]# systemctl enable mariadb.service
     
113. [root@localhost ~]# mysql
     
114. Welcome to the MariaDB monitor. Commands end with ; or \g.
     
115. Your MariaDB connection id is 3
     
116. Server version: 5.5.37-MariaDB MariaDB Server
     
117. 
     
118. Copyright (c) 2000, 2014, Oracle, Monty Program Ab and others.
     
119. 
     
120. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
     
121. 
     
122. MariaDB [(none)]> show databases;
     
123. +--------------------+
     
124. | Database      |
     
125. +--------------------+
     
126. | information_schema |
     
127. | mysql       |
     
128. | performance_schema |
     
129. | test        |
     
130. +--------------------+
     
131. rows in set (0.00 sec)
     
132. 
     
133. MariaDB [(none)]> use test
     
134. Database changed
     
135. MariaDB [test]> show tables;
     
136. Empty set (0.00 sec)
     
137. 
     
138. MariaDB [test]> exit
     
139. Bye
     
140. [root@localhost ~]# mysql_secure_installation
     
141. /usr/bin/mysql_secure_installation: line 379: find_mysql_client: command not found
     
142. 
     
143. NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
     
144.    SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
     
145. 
     
146. In order to log into MariaDB to secure it, we'll need the current
     
147. password for the root user. If you've just installed MariaDB, and
     
148. you haven't set the root password yet, the password will be blank,
     
149. so you should just press enter here.
     
150. 
     
151. ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
     
152. Enter current password for root (enter for none):
     
153. OK, successfully used password, moving on...
     
154. 
     
155. Setting the root password ensures that nobody can log into the MariaDB
     
156. root user without the proper authorisation.
     
157. 
     
158. Set root password? [Y/n] y
     
159. New password:
     
160. Re-enter new password:
     
161. Password updated successfully!
     
162. Reloading privilege tables..
     
163. ... Success!
     
164. 
     
165. 
     
166. By default, a MariaDB installation has an anonymous user, allowing anyone
     
167. to log into MariaDB without having to have a user account created for
     
168. them. This is intended only for testing, and to make the installation
     
169. go a bit smoother. You should remove them before moving into a
     
170. production environment.
     
171. 
     
172. Remove anonymous users? [Y/n] y
     
173. ... Success!
     
174. 
     
175. Normally, root should only be allowed to connect from 'localhost'. This
     
176. ensures that someone cannot guess at the root password from the network.
     
177. 
     
178. Disallow root login remotely? [Y/n] y
     
179. ... Success!
     
180. 
     
181. By default, MariaDB comes with a database named 'test' that anyone can
     
182. access. This is also intended only for testing, and should be removed
     
183. before moving into a production environment.
     
184. 
     
185. Remove test database and access to it? [Y/n] y
     
186. - Dropping test database...
     
187. ... Success!
     
188. - Removing privileges on test database...
     
189. ... Success!
     
190. 
     
191. Reloading the privilege tables will ensure that all changes made so far
     
192. will take effect immediately.
     
193. 
     
194. Reload privilege tables now? [Y/n] y
     
195. ... Success!
     
196. 
     
197. Cleaning up...
     
198. 
     
199. All done! If you've completed all of the above steps, your MariaDB
     
200. installation should now be secure.
     
201. 
     
202. Thanks for using MariaDB!
     
203. [root@localhost ~]# mysql -uroot -p
     
204. Enter password:
     
205. Welcome to the MariaDB monitor. Commands end with ; or \g.
     
206. Your MariaDB connection id is 15
     
207. Server version: 5.5.37-MariaDB MariaDB Server
     
208. 
     
209. Copyright (c) 2000, 2014, Oracle, Monty Program Ab and others.
     
210. 
     
211. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
     
212. 
     
213. MariaDB [(none)]> show databases;
     
214. +--------------------+
     
215. | Database      |
     
216. +--------------------+
     
217. | information_schema |
     
218. | mysql       |
     
219. | performance_schema |
     
220. | zbphp.com     |
     
221. +--------------------+
     
222. rows in set (0.00 sec)
     
223. 
     
224. MariaDB [(none)]>

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