centos7安裝 mysql5 7，自定義目錄

shell> yum search libaio

shell> yum install libaio
shell>
mkdir /prod/db
shell>
cd /prod/db
shell>
wget 
shell>
tar -axvf mysql-5.7.27-linux-glibc2.12-x86_64.tar.gz
shell>
mv /prod/db/mysql-5.7.27-linux-glibc2.12-x86_64 mysql
shell>
cd mysql
shell>
groupadd mysql
shell>
useradd -r -g mysql -s /bin/false mysql
shell>
ln -s /prod/db/mysql mysql
shell> mysql/bin/mysqld --user=mysql --basedir=/prod/db/mysql --datadir=/prod/db/mysql/data/ --initialize

grant

allprivilegeson*
.*to'root'@'%
' identified by 'yourpassword' with
grant
option
;flush privileges
;exit

[client]

port = 3306
socket = /prod/db/mysql/mysql.sock
[mysqld]
port = 3306
basedir=/prod/db/mysql
datadir=/prod/db/mysql/data
socket=/prod/db/mysql/mysql.sock
pid-file=/prod/db/mysql/mysql.pid
explicit_defaults_for_timestamp
log_error=/prod/db/mysql/log/mysql-error.log
slow_query_log_file =/prod/db/mysql/log/mysql-slow.log

shll> yum search libaio

shll> yum install libaio

shell>

groupadd mysql

shell>

useradd -r -g mysql -s /bin/false mysql

shell>

wget

shell>

tar -axvf mysql-5.7.27-linux-glibc2.12-x86_64.tar.gz

shell>

mv /prod/db/mysql-5.7.27-linux-glibc2.12-x86_64 mysql

shell>

ln -s /prod/db/mysql mysql

mysql/bin/mysqld --user=mysql --basedir=/prod/db/mysql --datadir=/prod/db/mysql/data/  --initialize

sql

>
set password=password(
'yourpassword'
);

sql

>
grant
allprivilegeson*
.*to'root'@'%
' identified by 'yourpassword' with
grant
option
;

sql

> flush privileges
;

shell> mysqld --initialize的時候出現了--initialize specified but the data directory has files in it. aborting. 錯誤

a、檢查my.cnf檔案中datadir配置路徑下，是否有data資料夾

b、檢查data資料夾下是否為空，不為空則清空資料夾

問題二:

使用mysql -uroot -p密碼，連線資料庫，出現

shell> error 2002 (hy000): can't connect to local mysql server through socket '/prod/db/mysql/run/mysql.sock' (2)

shell>

service mysql restart

問題三

安裝完成後無法獲取初始密碼。

解決方法：

1. 在配置檔案/prod/db/mysql/my.cnf中 [mysqld] 這一項下新增skip-grant-tables 這個配置，然後儲存。

2. 密登入：輸入 mysql -u root -p 命令然後回車，當需要輸入密碼時，直接按enter鍵。
3. 重置密碼：

shell>

vi mysql/my.cnf

[mysqld]

skip-grant-tables

密登入

shell> mysql -u root -p

sql

>
use mysql;
sql>
update
user
set authentication_string=password(
'新密碼'
)where
sql>
user
='root'
and host=
'%';
sql> flush privileges
;

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