Ubuntu手动安装Mysql包

ubuntu通过tar包安装mysql5.7.21

1.下载解压命令见下：

1. wget https://dev.mysql.com//Downloads/MySQL-5.7/mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz
2. tar -zxvf mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz

2.将解压后文件夹所有文件复制到/usr/local/mysql下

sudo cp -r mysql-5.7.21-linux-glibc2.12-x86_64/. /usr/local/mysql

3.在mysql文件夹下创建data文件夹(mysql的数据文件夹)和mysql_3306.err日志文件

1. sudo mkdir /usr/local/mysql/data
2. sudo vim mysql_3306.err
3. sudo chmod -R 777 ./ #设置读写权限

4.添加用户组

sudo groupadd mysql

5.添加用户

1. sudo useradd -r -g mysql -s /bin/false mysql
2. sudo /etc/my.cnf
   添加信息如下：
   [client]
   port = 3306
   socket = /usr/local/mysql/mysql.sock
   [mysql]
   no-auto-rehash

6. 添加mysql配置信息

[mysqld]
socket = /usr/local/mysql/mysql.sock
character_set_server= utf8
init_connect= 'SET NAMES utf8'
basedir= /usr/local/mysql
datadir= /usr/local/mysql/data
socket = /usr/local/mysql/mysql.sock
pid-file= /usr/local/mysql/mysqld.pid
log-error= /usr/local/mysql/mysql_3306.err
sql_mode= STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

[mysqld_safe]
open-files-limit = 8192
log-error= /usr/local/mysql/mysql_3306.err

保存后对mysql进行初始化

1. 初始化

sudo /usr/local/mysql/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql/bin/mysqld --datadir=/usr/local/mysql/data
如果报错，可以去/usr/local/mysql/mysql_3306.err文件查看error
初始化密码可以看到，如：
[Note] A temporary password is generated for root@localhost: *.>9Yy9Uk&Fx

1. 启动mysql（后台启动）

sudo /usr/local/mysql/bin/mysqld_safe --user=mysql &

1. 修改密码
2. sudo /usr/local/mysql/bin/mysql -u root -p

2.  use mysql; 一定要加分号

3. update mysql.user set authentication_string=password('你的密码') where user='root' ;

4.  flush privileges;

5.  quit 退出

10.开放远程连接

>use mysql;

>update user set user.Host='%' where user.User='root';

>flush privileges;