【MySQL安裝】Linux下安裝MySQL（預編譯）

預編譯方式安裝MySQL

一、  環境說明

作業系統：Redhat Linux 7.2

MySQL 版本： 5.7

安裝介質： mysql-5.7.25-linux-glibc2.12-x86_64.tar .gz

二、  安裝MySQL 軟體

1. 建立使用者和組

# groupadd mysql

# useradd -g mysql - d  / home /mysql mysql

# passwd mysql

2.  上傳壓縮包到/usr/local/ 目錄，解壓

# cd /usr/local/

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

解壓後會生成一個mysql-5.7.25-linux-glibc2.12-x86_64 的資料夾

3.  建立軟連結

# ln -s mysql-5.7.25-linux-glibc2.12-x86_64 mysql

三、  初始化MySQL 資料庫

1.  建立目錄

# cd /usr/local/mysql

# mkdir mysql-files

# chmod 750 mysql-files/

2.  初始化資料庫

# cd /usr/local/mysql

# chown -R mysql:mysql .

# bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data

注：basedir ：指定 MySQL 的安裝目錄

    datadir ：指定 MySQL 的資料檔案目錄

2020-03-17T07:44:05.186790Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).

2020-03-17T07:44:05.629460Z 0 [Warning] InnoDB: New log files created, LSN=45790

2020-03-17T07:44:05.709511Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.

2020-03-17T07:44:05.773460Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 140c9551-6823-11ea-ae76-0050563016cd.

2020-03-17T07:44:05.774908Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.

2020-03-17T07:44:05.776860Z 1 [Note] A temporary password is generated for

root@localhost: nwV/pWg:p5ko

（紅色字型就是初始root 密碼）

# bin/mysql_ssl_rsa_setup --datadir=/usr/local/mysql/data

Generating a 2048 bit RSA private key

.........................................................................+++

.........................................................................+++

writing new private key to 'ca-key.pem'

-----

Generating a 2048 bit RSA private key

.........................................................................+++

...............+++

writing new private key to 'server-key.pem'

-----

Generating a 2048 bit RSA private key

.......................................+++

.+++

writing new private key to 'client-key.pem'

-----

# chown -R root .

# chown -R mysql data mysql-files/

3.  建立MySQL 配置檔案 my.cnf

（my.conf 檔案已經有了）

# mv /etc/my.cnf /etc/my.cnf.bak

# vi /etc/my.cnf

[mysqld]

basedir=/usr/local/mysql

datadir=/usr/local/mysql/data

4.  啟動MySQL

方法一：使用mysqld_safe （手動啟動）

# bin/mysqld_safe --user=mysql &

 

方法二：使用mysql.server 指令碼（將 mysqld 新增到服務中）

# cd /usr/local/mysql

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

# chkconfig --add mysqld

# chkconfig mysqld on

# service mysqld start

Starting MySQL. SUCCESS!

[1] +  Done                    bin/mysqld_safe --user=mysql

5.  檢視MySQL 程式

# ps -ef|grep mysql

mysql      7138   7024  0 08:28 ?        00:00:03 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=mysql.err --pid-file=/usr/local/mysql/data/mysql.pid

注 ：plugin-dir ：外掛目錄

log-error ：錯誤日誌

  pid-file ： pid 檔案

凡是沒有指定目錄的，都是放在data 目錄下

6.  修改環境變數

# echo "export PATH=$PATH:/usr/local/mysql/bin" >> /etc/profile

# source /etc/profile

7.  登入mysql

# mysql -uroot -p'nwV/pWg:p5ko'

mysql: [Warning] Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 10

Server version: 5.7.25

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>

8.  重置root 密碼

mysql> alter user root@'localhost' identified by 'P@ssw0rd';

（可以嘗試重新登入）

m ysql> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| performance_schema |

| sys                |

+--------------------+

4 rows in set (0.00 sec)

9.  如果需要重新初始化[ 可選 ]

# service mysqld stop

# rm -rf /usr/local/mysql/data/

 

# cd /usr/local/mysql

# chown -R mysql:mysql .

# bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data

# bin/mysql_ssl_rsa_setup

# chown -R root.

# chown -R mysql data mysql-files

10.  可以在作業系統層面改密碼

# mysqladmin -u'root' -p'P@ssw0rd' password "qaq123"

mysqladmin: [Warning] Using a password on the command line interface can be insecure.

Warning: Since password will be sent to server in plain text, use ssl connection to ensure password safety.

上述警告忽略

 

 

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