Mysql notes
Links
Backup a database
You may want to log in mysql and do "show databases;" to see which to backup, then do it like this.
mysqldump -u root -p [databasename] > [backupfile.sql]
Change a root password
Change an existing Mysql root password like this:
mysqladmin -u root -p'oldpassword' password 'newpassword'
Lost MySQL password?
By example: recreated mysql passwords for the wikiuser and mysql-root. You can reset root password - stop mysql and start the daemon like this:
- reset mysql root password
sudo /etc/init.d/mysql stop
sudo mysqld --skip-grant-tables
mysql -u root
mysql> UPDATE mysql.user SET Password=PASSWORD('password') WHERE User='root';
mysql> FLUSH PRIVILEGES;
mysql> exit
sudo mysqladmin shutdown -u root
sudo /etc/init.d/mysql start
- Change mysql wikiuser password
$ mysql -u root -p
mysql> use mysql;
mysql> update user set password=PASSWORD("NEWPASSWORD") where User='wikiuser';
mysql> flush privileges;
mysql> quit
