一、系統環境
[root@localhost 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：
| [root@localhost home]# yum install mysql-server 已加載插件：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 沒有可用軟件包 mysql-server。 錯誤：無須任何處理 |
出現這樣問題是CentOS 7 版本將MySQL數據庫軟件從默認的程序列表中移除，用mariadb代替了
有兩種解決辦法：
方法一：安裝mariadb
MariaDB數據庫管理系統是MySQL的一個分支，采用GPL授權許可 MariaDB的目的是完全兼容MySQL，包括API和命令行，使之能輕松成為MySQL的代替品。MariaDB由MySQL的創始人Michael Widenius（英語：Michael Widenius）主導開發，他早前將自己創建的公司MySQL AB賣給了SUN，此后，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
[root@localhost home]# yum install mariadb-server mariadb
mariadb數據庫的相關命令是：
| systemctl start mariadb #啟動MariaDB systemctl stop mariadb #停止MariaDB systemctl restart mariadb #重啟MariaDB systemctl enable mariadb #設置開機啟動 |
先啟動數據庫
[root@yl-web yl]# systemctl start mariadb
默認無密碼
| [root@localhost 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) |
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 |
