MySQL的安裝過程

本人的系統是Manjaro，查詢了一下Archwiki發現，不少linux默認的SQL數據庫是MariaDB了。同時說，MySQL已經被移到了AUR庫裏面。html

按照Oracle的德行，MySQL的創始人建立了了一個MySQL的分支，MariaDB，若是MySQL閉源，MariaDB能夠馬上代替MySQL使用。所以，不難知道MariaDB是徹底兼容MySQL的。mysql

不過的話，MySQL不少項目都使用這個，最後決定安裝MySQL。linux

安裝MySQL

安裝MySQLsql

sudo pacman -S mysql

安裝後的一系列配置

查看安裝日誌

[2020-04-01T13:29:05+0800] [ALPM-SCRIPTLET] :: You need to initialize the MySQL data directory prior to starting
[2020-04-01T13:29:05+0800] [ALPM-SCRIPTLET]    the service. This can be done with mysqld --initialize command, e.g.:
[2020-04-01T13:29:05+0800] [ALPM-SCRIPTLET]    mysqld --initialize --user=mysql --basedir=/usr --datadir=/var/lib/mysql
[2020-04-01T13:29:05+0800] [ALPM-SCRIPTLET] :: Additionally you should secure your MySQL installation using
[2020-04-01T13:29:05+0800] [ALPM-SCRIPTLET]    mysql_secure_installation command after starting the mysqld service

看到須要初始化 MySQLshell

執行命令：數據庫

mysqld --initialize --user=mysql --basedir=/usr --datadir=/var/lib/mysql

初始化MySQL

mysqld --initialize --user=mysql --basedir=/usr --datadir=/var/lib/mysql

執行之後立刻就報錯了。（煩人）安全

2020-04-01T05:45:51.941236Z 0 [Warning] [MY-010915] [Server] 'NO_ZERO_DATE', 'NO_ZERO_IN_DATE' and 'ERROR_FOR_DIVISION_BY_ZERO' sql modes should be used with strict mode. They will be merged with strict mode in a future release.
2020-04-01T05:45:51.941340Z 0 [System] [MY-013169] [Server] /usr/bin/mysqld (mysqld 8.0.19) initializing of server in progress as process 75054
2020-04-01T05:45:51.943568Z 0 [ERROR] [MY-010457] [Server] --initialize specified but the data directory has files in it. Aborting.
2020-04-01T05:45:51.943574Z 0 [ERROR] [MY-013236] [Server] The designated data directory /var/lib/mysql/ is unusable. You can remove all files that the server added to it.
2020-04-01T05:45:51.943645Z 0 [ERROR] [MY-010119] [Server] Aborting
2020-04-01T05:45:51.943786Z 0 [System] [MY-010910] [Server] /usr/bin/mysqld: Shutdown complete (mysqld 8.0.19)  Source distribution.

查看 [ERROR] 信息之後發現bash

The designated data directory /var/lib/mysql/ is unusable. You can remove all files that the server added to it.url

好吧，那也只好這樣了。sudo su 切換到root帳戶下面。~~rm -rf /var/lib/mysql/* 刪除裏面的文件。~~打開文件夾cd /後面這樣安全寫var/lib ，而後刪除mysql裏面的文件rm -rf mysql/*。後面這樣作就算出錯，也不至於把系統刪了。spa

再次初始化

mysqld --initialize --user=mysql --basedir=/usr --datadir=/var/lib/mysql

出現日誌

2020-04-01T05:52:22.017420Z 0 [Warning] [MY-010915] [Server] 'NO_ZERO_DATE', 'NO_ZERO_IN_DATE' and 'ERROR_FOR_DIVISION_BY_ZERO' sql modes should be used with strict mode. They will be merged with strict mode in a future release.
2020-04-01T05:52:22.017498Z 0 [System] [MY-013169] [Server] /usr/bin/mysqld (mysqld 8.0.19) initializing of server in progress as process 75837
2020-04-01T05:52:39.779289Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: s?2P***skGeq(這是臨時密碼)

發現，沒有[ERROR]開心的很。

啓動服務

systemctl start mysqld

沒有報錯之後就是安裝成功了。

初次登陸MySQL

重置root密碼

登陸
```
mysql -u root -p
```
Enter password:

密碼就是上面記錄的臨時密碼：s?2P***skGeq

修改密碼

進入MySQL的shell裏面之後，執行命令

ALTER USER 'root'@'localhost' IDENTIFIED BY 'root-password';

安裝mysql可視化界面

mysql有一個叫作workbench的可視化界面，感受還不錯。

sudo pacman -S mysql-workbench

參考源：

https://dev.mysql.com/doc/refman/8.0/en/installing.html

MySQL 8 的安裝