add mysql reminder

docs/divers/server/index.md

@@ -5,4 +5,5 @@
 - [Installer Nextcloud avec Docker-Compose](nextcloud_docker-compose_on_debian-10_with_nginx_reverse-proxy.md)
 - [Installer un serveur Debian SSH + Samba](serveur_debian_smb_ssh.md)
 - [Un mémo postgres-cli](postgres.md)
+- [Un mémo mysql](mysql.md)
 - [Un mémo ssh](ssh.md)

docs/divers/server/mysql.md

@@ -0,0 +1,97 @@
+# My MySQL reminder
+
+
+## Setting up a password for root user just after install:
+
+    sudo  mysql -u root
+    
+## Resetting root password:
+
+    sudo mysql_secure_installation
+    
+## Creating a user and granting privileges:
+
+    CREATE USER 'user'@'localhost' IDENTIFIED BY 'password';
+    GRANT ALL ON database_name.* TO 'user'@'localhost' IDENTIFIED BY 'password' WITH GRANT OPTION;
+    FLUSH PRIVILEGES;
+
+Granting privileges on all databases: 
+ 
+    GRANT ALL PRIVILEGES ON *.* TO 'user'@'localhost';
+    
+Changing a user's password:
+
+    SET PASSWORD FOR 'user'@'localhost' = PASSWORD('password');
+
+    ALTER USER 'user'@'localhost' IDENTIFIED BY 'password';
+
+Listing all users :
+
+    SELECT User, Host, Password FROM mysql.user;
+
+Changing a user's associated host (example from host % to host loclahost):
+
+    UPDATE mysql.user SET Host='localhost' WHERE Host='%' AND User='user'
+
+See also, on users management:
+- [https://support.rackspace.com/how-to/mysql-resetting-a-lost-mysql-root-password/](https://support.rackspace.com/how-to/mysql-resetting-a-lost-mysql-root-password/)
+- [https://lean.fr/reinitialiser-le-mot-de-passe-root-mysql-sans-mot-de-passe-42495.html](https://lean.fr/reinitialiser-le-mot-de-passe-root-mysql-sans-mot-de-passe-42495.html)
+- [MySQL sur Ubuntu 18.04](https://www.digitalocean.com/community/tutorials/comment-installer-mysql-sur-ubuntu-18-04-fr)
+- [MySQL on Ubuntu Bionic](https://tecadmin.net/install-mysql-on-ubuntu-18-04-bionic/)
+- [Linuxtricks](https://www.linuxtricks.fr/wiki/mysql-reinitialiser-le-mot-de-passe-root)
+- [Unix socket in MariaDB](https://mariadb.com/kb/en/library/authentication-plugin-unix-socket/)
+- [SET PASSWORD](https://mariadb.com/kb/en/library/set-password/)
+- [ALTER USER](https://mariadb.com/kb/en/library/alter-user/)
+- [Create new user and grant permissions](https://kyup.com/tutorials/create-new-user-grant-permissions-mysql/)
+- [Utilisateurs et privilèges sur MySQL](https://blog.emmanuelgautier.fr/utilisateurs-et-privileges-sous-mysql/)
+- [Voir les droits des utilisateurs](https://www.it-connect.fr/voir-les-droits-utilisateur-dans-mysql-en-ligne-de-commande-%EF%BB%BF/)
+- [Changing MySQL user password](https://linuxacademy.com/blog/linux/changing-mysql-user-password/)
+
+## Connecting to MySQL:
+
+    sudo mysql
+    
+## Creating a database:
+
+    CREATE DATABASE lpic CHARACTER SET 'utf8'; #Beware of encoding
+    
+## Saving databases (basic level, assuming your user is root):
+
+    mysqldump -u root -p password database > database.sql #insecure
+    MYSQL_PWD="password" mysqldump -u root database > database.sql #secure
+    MYSQL_PWD="password" mysqldump -u root --all-databases > database.sql
+    
+See also, for more advanced features):
+- [Utilisation de myssqldump](https://www.geek-directeur-technique.com/2017/07/17/utilisation-de-mysqldump)
+- [Guide de sauvegarde et restauration MySQL](https://www.memoinfo.fr/tutoriels-linux/guide-sauvegarde-restauration-mysql/)
+
+## Deleting databases:
+
+    DROP DATABASE [IF EXISTS] database_name;
+    
+## Checking a database encoding (default is UTF8):
+
+    SELECT default_character_set_name FROM information_schema.SCHEMATA S WHERE schema_name = "database_name";
+    
+See: [How to convert a MySQL database to UTF-8 encoding](https://www.a2hosting.es/kb/developer-corner/mysql/convert-mysql-database-utf-8)
+
+## Leaving the MySQL prompt:
+
+    quit
+    
+## Checking the MySQL version:
+
+    SELECT @@version;
+    
+## Stopping/starting/restarting the service:
+
+[See](https://coolestguidesontheplanet.com/start-stop-mysql-from-the-command-line-terminal-osx-linux/)
+
+## Upgrading MySQL:
+
+- [5.5 to 5.7](https://pupungbp.com/upgrading-mysql-55-to-57-in-debian/)
+- [5.7](https://dev.mysql.com/doc/refman/5.7/en/upgrading.html)
+
+## Courses and tutorials in French:
+
+[SQL.sh](https://sql.sh/)

mkdocs.yml

@@ -85,7 +85,8 @@ nav:
             - "Nextcloud": divers/server/nextcloud_docker-compose_on_debian-10_with_nginx_reverse-proxy.md 
             - "Wordpress": divers/server/wordpress_docker-compose_on_debian-10_with_nginx_reverse-proxy.md 
             - "SSH - SAMBA": divers/server/serveur_debian_smb_ssh.md 
-            - " Mémo Postgresql": divers/server/postgres.md
+            - "Mémo Postgresql": divers/server/postgres.md:
+            - "Mémo Mysql" divers/server/mysql.md
             - " Mémo SSH": divers/server/ssh.md
         - "DevOps":
             - divers/devops/index.md