E faʻafefea ona pulea MySQL database? SSH Poloaiga e Pulea MySQL Servers

auala e pulea aiMySQL database? SSH pulega puleMySQLsapalai

MySQL Pulega

Amata ma taofi le MySQL server

Muamua, e tatau ona tatou siaki pe o loʻo i luga le server MySQL e ala i le faʻatinoina o le poloaiga lenei:

ps -ef | grep mysqld

Afai ua uma ona amata MySql, o le poloaiga o loʻo i luga o le a faʻaalia ai se lisi o faiga mysql, pe a le amataina mysql, e mafai ona e faʻaogaina le poloaiga lenei e amata ai le mysql server:

root@host# cd /usr/bin
./mysqld_safe &

Afai e te manaʻo e tapuni le MySQL server i le taimi nei, e mafai ona e faʻatinoina le poloaiga lenei:

root@host# cd /usr/bin
./mysqladmin -u root -p shutdown
Enter password: ******

MySQL Fa'aoga Fa'atonu

Afai e te manaʻomia le faʻaopoopoina o se tagata faʻaoga MySQL, naʻo lou manaʻomia e faʻaopoopo le tagata fou i le laulau faʻaoga ile mysql database.

O se fa'ata'ita'iga lea o le fa'aopoopoina o se tagata fa'aoga, o le igoa fa'aoga o le malo, o le uputatala o le guest123, ma ua fa'atagaina le tagata fa'aoga e fa'atino galuega FILIFILI, INSERT ma UPDATE:

root@host# mysql -u root -p
Enter password:*******
mysql> use mysql;
Database changed

mysql> INSERT INTO user 
          (host, user, password, 
           select_priv, insert_priv, update_priv) 
           VALUES ('localhost', 'guest', 
           PASSWORD('guest123'), 'Y', 'Y', 'Y');
Query OK, 1 row affected (0.20 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 1 row affected (0.01 sec)

mysql> SELECT host, user, password FROM user WHERE user = 'guest';
+-----------+---------+------------------+
| host      | user    | password         |
+-----------+---------+------------------+
| localhost | guest | 6f8c114b58f2ce9e |
+-----------+---------+------------------+
1 row in set (0.00 sec)

Pe a faʻaopoopo se tagata faʻaoga, faʻamolemole matau o le upu faʻamaonia o loʻo faʻailogaina e faʻaaoga ai le PASSWORD () galuega na saunia e MySQL.E mafai ona e vaʻai i le faʻataʻitaʻiga o loʻo i luga o le faʻailoga faʻaoga faʻaoga o le: 6f8c114b58f2ce9e.

Manatua:I MySQL 5.7, ua suia le upu faataga o le laulau faʻaoga eauthentication_string.

Manatua:Ia nofouta i le manaʻoga e faʻatino FA'AMATALAGA FLUSH fa'amatalaga.A mae'a le fa'atonuga, o le a toe uta le laulau fa'ameaalofa.

Afai e te le faʻaogaina lenei faʻatonuga, o le a le mafai ona e faʻaogaina le tagata fou fou e faʻafesoʻotaʻi i le mysql server sei vagana ua e toe amataina le mysql server.

A'o faia se tagata fa'aoga, e mafai ona e fa'ailoa mai fa'atagaga mo le tagata fa'aoga.

• Select_priv
• Insert_priv
• Update_priv
• Delete_priv
• Create_priv
• drop_priv
• Toe uta_priv
• shutdown_priv
• Process_priv
• File_priv
• Grant_priv
• References_priv
• Index_priv
• Alter_priv

O le isi auala e fa'aopoopo ai tagata fa'aoga e ala lea i le GRANT command of SQL. O le isi fa'atonuga o le a fa'aopoopo le tagata fa'aoga zara i le fa'amaumauga tu'ufa'atasia TUTORIALS, ma o le fa'aupuga o le zara123.

root@host# mysql -u root -p password;
Enter password:*******
mysql> use mysql;
Database changed

mysql> GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP
    -> ON TUTORIALS.*
    -> TO 'zara'@'localhost'
    -> IDENTIFIED BY 'zara123';

O le faʻatonuga o loʻo i luga o le a fatuina ai se faʻamaumauga faʻamatalaga tagata faʻaoga i le laulau faʻaoga ile mysql database.

Fa'aaliga: O faʻamatalaga MySQL SQL e faʻamutaina i se semicolon (;).

/etc/my.cnf faila faila

I lalo o tulaga masani, e te le manaʻomia le suia o le faila faʻatulagaina, o le faʻaogaina o le faila e faʻapea:

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock

[mysql.server]
user=mysql
basedir=/var/lib

[safe_mysqld]
err-log=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

I totonu o le faila faila, e mafai ona e faʻamaonia le lisi o loʻo teuina ai faila log error eseese.. I se tulaga masani, e te le manaʻomia le suia o nei faʻatonuga.

Poloaiga e pulea MySQL

O loʻo lisiina i lalo tulafono e masani ona faʻaaogaina i le faʻaogaina o le Mysql database:

• Faʻaaoga igoa teuina o faamatalaga :
  Filifili le Mysql database e fa'agaioia.A uma ona fa'aogaina lenei fa'atonuga, o poloaiga uma a Mysql e na'o lenei fa'amaumauga.

  mysql> use chenweiliang;
  Database changed

• FA'AALI FA'AVAE FA'AVAE: 
  Lisi le lisi o faʻamaumauga o le MySQL database management system.

  mysql> SHOW DATABASES;
  +--------------------+
  | Database           |
  +--------------------+
  | information_schema |
  | chenweiliang             |
  | cdcol              |
  | mysql              |
  | onethink           |
  | performance_schema |
  | phpmyadmin         |
  | test               |
  | wecenter           |
  | wordpress          |
  +--------------------+
  10 rows in set (0.02 sec)

• FA'AALI LA'AU:
  Fa'aali laulau uma o fa'amaumauga fa'amaumauga. A'o le'i fa'aogaina lenei fa'atonuga, e mana'omia lou fa'aogaina o le fa'atonuga fa'aoga e filifili ai le database e fa'agaioia.

  mysql> use chenweiliang;
  Database changed
  mysql> SHOW TABLES;
  +------------------+
  | Tables_in_chenweiliang |
  +------------------+
  | employee_tbl     |
  | chenweiliang_tbl       |
  | tcount_tbl       |
  +------------------+
  3 rows in set (0.00 sec)

• FAAALI KOLUMA MAI pepa fa'amatalaga:
  Fa'aali uiga o le laulau fa'amaumauga, ituaiga uiga, fa'amatalaga autu autu, pe o le NULL, fa'aletonu le tau ma isi fa'amatalaga.

  mysql> SHOW COLUMNS FROM chenweiliang_tbl;
  +-----------------+--------------+------+-----+---------+-------+
  | Field           | Type         | Null | Key | Default | Extra |
  +-----------------+--------------+------+-----+---------+-------+
  | chenweiliang_id       | int(11)      | NO   | PRI | NULL    |       |
  | chenweiliang_title    | varchar(255) | YES  |     | NULL    |       |
  | chenweiliang_author   | varchar(255) | YES  |     | NULL    |       |
  | submission_date | date         | YES  |     | NULL    |       |
  +-----------------+--------------+------+-----+---------+-------+
  4 rows in set (0.01 sec)

• FAAALI FAILAUGA MAI pepa fa'amatalaga:
  Fa'aali atu fa'amatalaga fa'asinoala auiliili o le laulau fa'amaumauga, e aofia ai KI FA'ATAU (primary key).

  mysql> SHOW INDEX FROM chenweiliang_tbl;
  +------------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
  | Table      | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |
  +------------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
  | chenweiliang_tbl |          0 | PRIMARY  |            1 | chenweiliang_id   | A         |           2 |     NULL | NULL   |      | BTREE      |         |               |
  +------------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
  1 row in set (0.00 sec)

• FA'AALI LE TULAGA FA'AVAE PEI [MAI le db_name] [PEI 'mamanu'] \G:
  O lenei poloaiga o le a faʻaalia ai le faʻatinoga ma fuainumera o le Mysql database management system.

  mysql> SHOW TABLE STATUS  FROM chenweiliang;   # 显示数据库 chenweiliang 中所有表的信息
  
  mysql> SHOW TABLE STATUS from chenweiliang LIKE 'chenweiliang%';     # 表名以chenweiliang开头的表的信息
  mysql> SHOW TABLE STATUS from chenweiliang LIKE 'chenweiliang%'\G;   # 加上 \G，查询结果按列打印