mysql binary installation and configuration

Install

1. Check whether it is installed

rpm -qa | grep mysql
查看出来有东西，可以使用下面命令将其删除（xxx 为文件全名）
rpm -e xxx

2. Install

2.1 Download the official Mysql package

Official website link: https://downloads.mysql.com/archives/community/
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2.2 Upload and decompress (the installation package can be deleted after decompression to save space)

tar -zxvf mysql-5.7.35-linux-glibc2.12-x86_64.tar.gz

2.3 Check whether there are mysql user groups and mysql users, if not, add or ignore:

groups mysql

Add user groups and users

groupadd mysql && useradd -r -g mysql mysql

4. Create a data directory and grant permissions

mkdir -p /data/mysql
chown mysql:mysql -R /data/mysql

5. Modify the configuration file vim /etc/my.cnf (if not, create a new one)

[mysqld]
bind-address=0.0.0.0
port=3306
user=mysql
basedir=/usr/local/mysql
datadir=/data/mysql
socket=/tmp/mysql.sock
log-error=/data/mysql/mysql.err
pid-file=/data/mysql/mysql.pid
#character config
character_set_server=utf8mb4
symbolic-links=0
explicit_defaults_for_timestamp=true

6. Initialization

The decompressed mysql-5.7.35-linux-glibc2.12-x86_64 file is moved to /usr/local/mysql (the folder name is changed to mysql without version number information)

cd /usr/local/mysql/bin/
./mysqld --defaults-file=/etc/my.cnf --basedir=/usr/local/mysql/ --datadir=/data/mysql/ --user=mysql --initialize

--defaults-file:指定配置文件
--basedir:
--datadir:指定数据目录
--user: 指定启动用户
--initialize:

7. View the initial password

cat /data/mysql/mysql.err

start mysql

cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql
service mysql start

change Password

1. 开启免密码登陆 修改my.cnf文件   默认在/etc/my.cnf。

　vim /etc/my.cnf         在【mysqld】模块下面添加：skip-grant-tables 保存退出。

 2. 重启服务，使配置生效 。   

 service mysql restart

3. 登陆     /usr/local/mysql/bin/mysql -u root -p   //不输入密码直接敲回车键

Refresh rules to allow external access

　　use mysql 　　　　 #选择访问mysql库
　　update user set host = '%' where user = 'root'; 　　　　 #使root能再任何host访问
　　FLUSH PRIVILEGES; 　　 　　 #刷新

5. Change password

ALTER USER "root"@"%" IDENTIFIED  BY "1234";

FLUSH PRIVILEGES; 　　 　　 #刷新

quit quit

Delete /etc/my.cnf password-free.

重启服务    service mysql restart