centos7 mysql安裝

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一、系統內容

 [[email protected] home]# cat /etc/redhat-release

 CentOS Linux release 7.2.1511 (Core)

二、mysql安裝

 安裝mysql和mysql-devel都成功，但是安裝mysql-server失敗，如下：

[[email protected] home]# yum install mysql-server    已載入外掛程式：fastestmirror, langpacks    Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast    base                                                                    | 3.6 kB  00:00:00         extras                                                                  | 3.4 kB  00:00:00         updates                                                                 | 3.4 kB  00:00:00        (1/4): base/7/x86_64/group_gz                                           | 155 kB  00:00:01        (2/4): extras/7/x86_64/primary_db                                       | 139 kB  00:00:01        (3/4): base/7/x86_64/primary_db                                         | 5.6 MB  00:00:38        (4/4): updates/7/x86_64/primary_db                                      | 4.7 MB  00:00:39      Loading mirror speeds from cached hostfile  * base: mirrors.163.com  * extras: mirrors.163.com  * updates: mirrors.163.com 沒有可用軟體包 mysql-server。 錯誤：無須任何處理

出現這樣問題是CentOS 7 版本將MySQL資料庫軟體從預設的程式列表中移除，用mariadb代替了

有兩種解決辦法：

 1、方法一：安裝mariadb

MariaDB資料庫管理系統是MySQL的一個分支，採用GPL授權許可 MariaDB的目的是完全相容MySQL，包括API和命令列，使之能輕鬆成為MySQL的代替品。MariaDB由MySQL的創始人Michael Widenius（英語：Michael Widenius）主導開發，他早前將自己建立的公司MySQL AB賣給了SUN，此後，隨著SUN被甲骨文收購，MySQL的所有權也落入Oracle的手中。MariaDB名稱來自Michael Widenius的女兒Maria的名字。

安裝mariadb，輸入安裝命令

[[email protected] home]# yum install mariadb-server mariadb

mariadb資料庫的相關命令是：

   systemctl start mariadb  #啟動MariaDB

   systemctl stop mariadb  #停止MariaDB

   systemctl restart mariadb  #重啟MariaDB

   systemctl enable mariadb  #設定開機啟動

先啟動資料庫

  [[email protected] yl]# systemctl start mariadb

  預設無密碼

[[email protected] lzh]# mysql -u root -pEnter password: Welcome to the MariaDB monitor.  Commands end with ; or \g.Your MariaDB connection id is 6Server version: 5.5.52-MariaDB MariaDB ServerCopyright (c) 2000, 2016, Oracle, MariaDB Corporation 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 (0.01 sec)

2、方法二：官網下載安裝mysql-server

# wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm# rpm -ivh mysql-community-release-el7-5.noarch.rpm# yum install mysql-community-server

安裝成功後重啟mysql服務

    # service mysqld restart

初次安裝mysql，root賬戶沒有密碼

[[email protected] lzh]# mysql -u root Welcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 3Server version: 5.6.26 MySQL Community Server (GPL)Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.mysql> show databases;+--------------------+| Database           |+--------------------+| information_schema || mysql              || performance_schema || test               |+--------------------+4 rows in set (0.01 sec)

設定密碼

mysql> set password for ‘root‘@‘localhost‘ =password(‘password‘);Query OK, 0 rows affected (0.00 sec)

安裝完以後mariadb自動就被替換了，將不再生效。

[[email protected] lzh]# rpm -qa |grep mariadb

centos7 mysql安裝