centos7 安装 mariadb 的正确命令

使用的是linode的centos7系统，安装mysql发现已经默认的是mariadb。

但是不管是使用linode官网说明还是百度搜索到的的根本安装方法无法安装成功。

总是提示这一句：

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

最后通过google 搜索 install mariadb on centos 7得到了安装的关键一步。

现在安装成功，特此备注一下整个安装过程：

mysql:[root@localhost ~]# yum -y install mariadb*
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.linode.com
 * extras: mirrors.linode.com
 * updates: mirrors.linode.com
Resolving Dependencies
--> Running transaction check
---> Package mariadb.x86_64 1:5.5.37-1.el7_0 will be installed
---> Package mariadb-bench.x86_64 1:5.5.37-1.el7_0 will be installed
---> Package mariadb-devel.x86_64 1:5.5.37-1.el7_0 will be installed
---> Package mariadb-embedded.x86_64 1:5.5.37-1.el7_0 will be installed
---> Package mariadb-embedded-devel.x86_64 1:5.5.37-1.el7_0 will be installed
---> Package mariadb-libs.x86_64 1:5.5.37-1.el7_0 will be installed
---> Package mariadb-server.x86_64 1:5.5.37-1.el7_0 will be installed
--> Processing Dependency: perl-DBD-MySQL for package: 1:mariadb-server-5.5.37-1.el7_0.x86_64
---> Package mariadb-test.x86_64 1:5.5.37-1.el7_0 will be installed
--> Running transaction check
---> Package perl-DBD-MySQL.x86_64 0:4.023-5.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

==========================================================================================================
 Package                           Arch              Version                     Repository          Size
==========================================================================================================
Installing:
 mariadb                           x86_64            1:5.5.37-1.el7_0            updates            8.9 M
 mariadb-bench                     x86_64            1:5.5.37-1.el7_0            updates            385 k
 mariadb-devel                     x86_64            1:5.5.37-1.el7_0            updates            744 k
 mariadb-embedded                  x86_64            1:5.5.37-1.el7_0            updates            3.6 M
 mariadb-embedded-devel            x86_64            1:5.5.37-1.el7_0            updates            7.4 M
 mariadb-libs                      x86_64            1:5.5.37-1.el7_0            updates            752 k
 mariadb-server                    x86_64            1:5.5.37-1.el7_0            updates             11 M
 mariadb-test                      x86_64            1:5.5.37-1.el7_0            updates            7.9 M
Installing for dependencies:
 perl-DBD-MySQL                    x86_64            4.023-5.el7                 base               140 k

Transaction Summary
==========================================================================================================
Install  8 Packages (+1 Dependent package)

Total download size: 40 M
Installed size: 279 M
Downloading packages:
(1/9): mariadb-bench-5.5.37-1.el7_0.x86_64.rpm                                     | 385 kB  00:00:00
(2/9): mariadb-devel-5.5.37-1.el7_0.x86_64.rpm                                     | 744 kB  00:00:00
(3/9): mariadb-embedded-5.5.37-1.el7_0.x86_64.rpm                                  | 3.6 MB  00:00:00
(4/9): mariadb-5.5.37-1.el7_0.x86_64.rpm                                           | 8.9 MB  00:00:00
(5/9): mariadb-libs-5.5.37-1.el7_0.x86_64.rpm                                      | 752 kB  00:00:00
(6/9): mariadb-server-5.5.37-1.el7_0.x86_64.rpm                                    |  11 MB  00:00:00
(7/9): mariadb-embedded-devel-5.5.37-1.el7_0.x86_64.rpm                            | 7.4 MB  00:00:00
(8/9): mariadb-test-5.5.37-1.el7_0.x86_64.rpm                                      | 7.9 MB  00:00:00
(9/9): perl-DBD-MySQL-4.023-5.el7.x86_64.rpm                                       | 140 kB  00:00:00
----------------------------------------------------------------------------------------------------------
Total                                                                      36 MB/s |  40 MB  00:00:01
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : 1:mariadb-libs-5.5.37-1.el7_0.x86_64                                                   1/9
  Installing : 1:mariadb-5.5.37-1.el7_0.x86_64                                                        2/9
  Installing : perl-DBD-MySQL-4.023-5.el7.x86_64                                                      3/9
  Installing : 1:mariadb-server-5.5.37-1.el7_0.x86_64                                                 4/9
  Installing : 1:mariadb-devel-5.5.37-1.el7_0.x86_64                                                  5/9
  Installing : 1:mariadb-embedded-5.5.37-1.el7_0.x86_64                                               6/9
  Installing : 1:mariadb-embedded-devel-5.5.37-1.el7_0.x86_64                                         7/9
  Installing : 1:mariadb-test-5.5.37-1.el7_0.x86_64                                                   8/9
  Installing : 1:mariadb-bench-5.5.37-1.el7_0.x86_64                                                  9/9
  Verifying  : 1:mariadb-test-5.5.37-1.el7_0.x86_64                                                   1/9
  Verifying  : 1:mariadb-embedded-devel-5.5.37-1.el7_0.x86_64                                         2/9
  Verifying  : 1:mariadb-embedded-5.5.37-1.el7_0.x86_64                                               3/9
  Verifying  : 1:mariadb-libs-5.5.37-1.el7_0.x86_64                                                   4/9
  Verifying  : 1:mariadb-bench-5.5.37-1.el7_0.x86_64                                                  5/9
  Verifying  : 1:mariadb-5.5.37-1.el7_0.x86_64                                                        6/9
  Verifying  : 1:mariadb-server-5.5.37-1.el7_0.x86_64                                                 7/9
  Verifying  : perl-DBD-MySQL-4.023-5.el7.x86_64                                                      8/9
  Verifying  : 1:mariadb-devel-5.5.37-1.el7_0.x86_64                                                  9/9

Installed:
  mariadb.x86_64 1:5.5.37-1.el7_0                        mariadb-bench.x86_64 1:5.5.37-1.el7_0
  mariadb-devel.x86_64 1:5.5.37-1.el7_0                  mariadb-embedded.x86_64 1:5.5.37-1.el7_0
  mariadb-embedded-devel.x86_64 1:5.5.37-1.el7_0         mariadb-libs.x86_64 1:5.5.37-1.el7_0
  mariadb-server.x86_64 1:5.5.37-1.el7_0                 mariadb-test.x86_64 1:5.5.37-1.el7_0

Dependency Installed:
  perl-DBD-MySQL.x86_64 0:4.023-5.el7

Complete!
[root@localhost ~]# systemctl start mariadb.service
[root@localhost ~]# systemctl enable mariadb.service
ln -s '/usr/lib/systemd/system/mariadb.service' '/etc/systemd/system/multi-user.target.wants/mariadb.servi                     
ce'
[root@localhost ~]# mysql
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 2
Server version: 5.5.37-MariaDB MariaDB Server

Copyright (c) 2000, 2014, Oracle, Monty Program Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> logout
    -> exit
    ->
    -> ;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaD                     
B server version for the right syntax to use near 'logout
exit' at line 1
MariaDB [(none)]> exit
Bye
[root@localhost ~]# systemctl enable mariadb.service
[root@localhost ~]# mysql
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 3
Server version: 5.5.37-MariaDB MariaDB Server

Copyright (c) 2000, 2014, Oracle, Monty Program Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
+--------------------+
4 rows in set (0.00 sec)

MariaDB [(none)]> use test
Database changed
MariaDB [test]> show tables;
Empty set (0.00 sec)

MariaDB [test]> exit
Bye
[root@localhost ~]# mysql_secure_installation
/usr/bin/mysql_secure_installation: line 379: find_mysql_client: command not found

NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
      SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!

In order to log into MariaDB to secure it, we'll need the current
password for the root user.  If you've just installed MariaDB, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
Enter current password for root (enter for none):
OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MariaDB
root user without the proper authorisation.

Set root password? [Y/n] y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
 ... Success!


By default, a MariaDB installation has an anonymous user, allowing anyone
to log into MariaDB without having to have a user account created for
them.  This is intended only for testing, and to make the installation
go a bit smoother.  You should remove them before moving into a
production environment.

Remove anonymous users? [Y/n] y
 ... Success!

Normally, root should only be allowed to connect from 'localhost'.  This
ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n] y
 ... Success!

By default, MariaDB comes with a database named 'test' that anyone can
access.  This is also intended only for testing, and should be removed
before moving into a production environment.

Remove test database and access to it? [Y/n] y
 - Dropping test database...
 ... Success!
 - Removing privileges on test database...
 ... Success!

Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.

Reload privilege tables now? [Y/n] y
 ... Success!

Cleaning up...

All done!  If you've completed all of the above steps, your MariaDB
installation should now be secure.

Thanks for using MariaDB!
[root@localhost ~]# mysql -uroot -p
Enter password:
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 15
Server version: 5.5.37-MariaDB MariaDB Server

Copyright (c) 2000, 2014, Oracle, Monty Program Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| zbphp.com 		 |
+--------------------+
4 rows in set (0.00 sec)

MariaDB [(none)]>

文章 by default7#zbphp.com

========================2014-12-17 00:24 补充=================

最新正确的安装命令在：http://blog.youkuaiyun.com/default7/article/details/41973887