linux安装mysql 5.7.25指南

检查是否安装了mysql

rpm -qa | grep mysql

如有，类似

mysql-libs-5.1.52-1.el6_0.1.x86_64

卸载之

rpm -e --nodeps mysql-libs-5.1.52.x86_64

检查否存在 mariadb 数据库，如有，卸载之，卸载同上

rpm -qa | grep mariadb

查看linux系统是64位还是32位

getconf LONG_BIT

到mysql官网下载安装包(64位)

mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz

上传安装包至/usr/local，解压安装包

cd /usr/local
tar -zvxf mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz

重命名

mv mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz mysql-5.7.25

创建data目录

cd mysql-5.7.25
mkdir data

检查mysql组和用户是否存在，如无创建

cat /etc/group | grep mysql
#类似
mysql:x:490:
cat /etc/passwd | grep mysql
#类似
mysql:x:496:490::/home/mysql:/bin/bash

以上为存在的情况，如无，执行添加命令：

groupadd mysql
useradd -r -g mysql mysql

#useradd -r参数表示mysql用户是系统用户，不可用于登录系统

将/usr/local/mysql-5.7.25的所有者及所属组改为mysql

chown -R mysql.mysql /usr/local/mysql-5.7.25

在/usr/local/mysql-5.7.25/support-files目录下创建my_default.cnf

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. Its a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.


[mysqld]
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES 

basedir = /usr/local/mysql-5.7.25
datadir = /usr/local/mysql-5.7.25/data
port = 3306
socket = /tmp/mysql.sock
character-set-server=utf8

log-error = /usr/local/mysql-5.7.25/data/mysqld.log
pid-file = /usr/local/mysql-5.7.25/data/mysqld.pid

拷贝

cp ./support-files/my-default.cnf /etc/my.cnf

初始化 mysqld

cd /usr/local/mysql-5.7.25/bin
./mysqld --initialize --user=mysql --basedir=/usr/local/mysql-5.7.25/ --datadir=/usr/local/mysql-5.7.25/data/

初始化完成之后，查看日志

/usr/local/mysql-5.7.25/data/mysqld.log

临时密码

[Note] A temporary password is generated for root@localhost: i8r#tnAuaanT

把启动脚本放到开机初始化目录

cp support-files/mysql.server /etc/init.d/mysql

启动mysql服务

service mysql start

查看mysql进程

ps -ef | grep mysql

登录mysql，密码为初始密码

cd /usr/local/mysql-5.7.25/bin
./mysql -u root -p

修改密码

mysql> set password=password(root);
mysql> grant all privileges on *.* to root@% identified by root;
mysql> flush privileges;

添加远程访问权限

mysql> use mysql;
mysql> update user set host=% where user = root;
mysql> flush privileges;

重启mysql生效

mysql> service mysql stop
mysql> service mysql start

或

mysql> service mysql restart