linux mysql 安装

mkdir -p /data/mysql

1.下载
wget http://mirrors.163.com/mysql/Downloads/MySQL-8.0/mysql-8.0.17-linux-glibc2.12-x86_64.tar.xz

mysql-8.0.15-linux-glibc2.12-x86_64.tar.xz

2.解压

tar -xvf mysql-8.0.15-linux-glibc2.12-x86_64.tar.xz

mv mysql-8.0.15-linux-glibc2.12-x86_64 mysql

3.编辑 my.cnf

vi /etc/my.cnf

文件内容为:

按 Ctrl+C 复制代码
[client]
port=3306
socket=/data/mysql/mysql.sock

[mysqld]
port=3306
user=mysql
socket=/tmp/mysql/mysql.sock
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
log-error=error.log

transaction_isolation = READ-COMMITTED
character-set-server = utf8mb4
collation-server = utf8mb4_general_ci
lower_case_table_names = 1

#skip-grant-tables
按 Ctrl+C 复制代码
4.创建用户

groupadd mysql

useradd -g mysql mysql

5.更改目录权限

chown -R mysql:mysql /tmp/mysql

chown -R mysql:mysql /usr/local/mysql

chmod -R 755 /tmp/mysql /usr/local/mysql

6. 初始化

cd /usr/local/mysql

./bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data/ --lower-case-table-names=1

修改 vim /etc/my.conf

[mysqld_safe]
#log-error=/data/mysql/logs/mariadb.log
#pid-file=/data/mysql/logs/mariadb.pid

7.初始化密码

初始化时并没有出现 初始密码，因此需要修改密码。

注释 skip-grant-tables,可以使用无密码登录

启动 mysql

./support-files/mysql.server start

全局MySQL设置
ln -s /data/mysql/bin/mysql /usr/bin

1.清空密码

use mysql；

update user set authentication_string=’’ where user=‘root’;

2.无密码登录

mysql -u root -p

输入密码是直接回车。

ALTER user ‘root’@‘localhost’ IDENTIFIED BY ‘root’;

这样就修改好密码了。

刷新权限
FLUSH PRIVILEGES;

自此 mysql 就安装好了。

8 设置自动启动

cd support-files/

cp mysql.server /etc/init.d/mysql

chmod 755 /etc/init.d/mysql

cd /etc/init.d

chkconfig --add mysql

chkconfig --level 345 mysql on

mysql restart

9. 远程连接

1.在 my.cnf 的mysqld 下增加

default_authentication_plugin=mysql_native_password

2.进入mysql命令行

use mysql

update user set host =’%’ where user=‘root’;

ALTER USER root@’%’ IDENTIFIED WITH mysql_native_password BY ‘password’;

FLUSH PRIVILEGES;

使用客户端工具进行连接。

8.0修改密码
alter user ‘root’@‘localhost’ IDENTIFIED BY ‘password.’;
远程权限
use mysql;
update user set host="%" where user=“root”;
flush privileges;

navicat 不能连接

ALTER USER ‘root’@’%’ IDENTIFIED WITH mysql_native_password BY ‘password.’; #修改加密规则

ALTER USER ‘root’@’%’ IDENTIFIED BY ‘password.’ PASSWORD EXPIRE NEVER; #更新一下用户的密码

FLUSH PRIVILEGES; #刷新权限

mysqldump 软连接设置

ln -fs /data/mysql/bin/mysqldump /usr/bin

ln -fs /data/mysql/bin/mysql /usr/bin