1、下载tar包，这里使用wget从官网下载
https://downloads.mysql.com/archives/community/ 下载
wget https://downloads.mysql.com/archives/get/file/mysql-5.7.27-linux-glibc2.12-x86_64.tar.gz
2、将mysql安装到/usr/local/mysql下
解压
tar -zxvf mysql-5.7.27-linux-glibc2.12-x86_64.tar.gz
移动并且重命名
mv mysql-5.7.27-linux-glibc2.12-x86_64 /usr/local/mysql
3、新建data目录
mkdir /usr/local/mysql/data
4、新建mysql用户、mysql用户组
添加mysql用户组
groupadd mysql
添加mysql用户到mysql组
useradd mysql -g mysql
5、将/usr/local/mysql的所有者及所属组改为mysql
chown -R mysql.mysql /usr/local/mysql
6、配置
/usr/local/mysql/bin/mysql_install_db --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data
如果出现以下错误：
2020-01-09 09:55:45 [WARNING] mysql_install_db is deprecated. Please consider switching to mysqld --initialize
2020-01-09 09:55:46 [ERROR] Child process: /usr/local/mysql/bin/mysqldterminated prematurely with errno= 32
2020-01-09 09:55:46 [ERROR] Failed to execute /usr/local/mysql/bin/mysqld --bootstrap --datadir=/usr/local/mysql/data --lc-messages-dir=/usr/local/mysql/share --lc-messages=en_US --basedir=/usr/local/mysql
– server log begin –
– server log end –
则使用以下命令：
/usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data --initialize
如果出现以下错误：
/usr/local/mysql/bin/mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory
则执行以下命令：
yum install libaio* -y
完成后继续安装：
/usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data --initialize
编辑/etc/my.cnf
[mysqld]
datadir=/usr/local/mysql/data
basedir=/usr/local/mysql
socket=/tmp/mysql.sock
user=mysql
port=3306
character-set-server=utf8
#跳过密码验证，忘记密码 可以设置，然后修改密码，再关闭(即注释代码)
skip-grant-tables
#Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
#Settings user and group are ignored when systemd is used.
#If you need to run mysqld under a different user or group,
#customize your systemd unit file for mariadb according to the
#instructions in http://fedoraproject.org/wiki/Systemd
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
7、开启服务
将mysql加入服务
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql
开机自启
chkconfig mysql on
开启
service mysql start
8、设置密码
#登录（由于/etc/my.cnf中设置了取消密码验证，所以此处密码任意）
/usr/local/mysql/bin/mysql -u root -p
操作mysql数据库
mysql> use mysql;
修改密码
mysql> update user set authentication_string=password('你的密码') where user='root';
mysql> flush privileges;
mysql> exit;
9、将/etc/my.cnf中的skip-grant-tables删除
10、(如果登录不了)登录再次设置密码（不知道为啥如果不再次设置密码就操作不了数据库了）
如果出现以下错误：
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
/usr/local/mysql/bin/mysql -u root -p
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '修改后的密码';
mysql> exit;
11、授权其他机器登陆,允许远程连接
/usr/local/mysql/bin/mysql -u root -p
mysql> use mysql;
mysql> update user set host='%' where user = 'root';
mysql> flush privileges;
mysql> eixt;
12、添加快捷方式 软连接
ln -s /usr/local/mysql/bin/mysql /usr/bin
