本示例爲centos7版本：mysql爲mysql-5.5.56.tar.gz
1.服務器上的卸載原有數據庫
rpm -qa | grep mariadb ###查詢本機有沒有默認的mysql，centos7版本數據庫爲mariadb
rpm -e --nodeps ###有的話卸載掉
2.下載源碼包
https://www.mysql.com/ ###下載地址
下載好後傳到服務器
3.安裝依賴包
yum -y install make gcc-c++ cmake bison-devel ncurses-devel
4.創建用戶
groupadd mysql
useradd -M -s /sbin/nologin mysql -g mysql
5.解壓，源碼編譯安裝
tar zvxf mysql-5.5.56.tar.gz -C /usr/local/
cd /usr/local/mysql-5.5.56/
編譯：cmake -DCMAKE_INSTALL_PREFIX=/usr/local/mysql -DSYSCONFDIR=/etc -DDEFAULT_CHARSET=utf8 -DDEFAULT_COLL
ATION=utf8_general_ci -DWITH_EXTRA_CHARSETS=all
安裝：make
make install
6.對數據庫目錄進行授權
chmown -R mysql:mysql /usr/local/mysql
7.建立配置文件
拷貝mysql源碼目錄中的support-files文件夾下到/etc/mycnf
cp support-files/my-medium.cnf /etc/my.cnf
8.初始化數據庫
/usr/local/mysql/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --datadir=/usr/loca
l/mysql/data/
9.設置環境變量
export PATH=$PATH:/usr/local/mysql/bin
10.添加系統服務
cp -P support-files/mysql.server /etc/rc.d/init.d/mysqld
chmod a+x /etc/rc.d/init.d/mysqld
chkconfig --add mysqld
11.啓動數據庫：
service mysqld start
service mysqld status
netstat -anpt | grep mysqld
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 14245/mysqld
12.訪問數據庫（默認沒有密碼）
mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.5.56-log Source distribution
Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
本文檔只寫到怎麼安裝數據庫，下次文檔會寫如何使用數據庫
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