(實踐應用)CentOS + MySQL5.7 Have No mysqld_safe
- systemd is now used to look after mySQL instead of mysqld_safe (which is why you get the -bash: mysqld_safe: command not found error - it’s not installed)
The user table structure has changed.
Stop mysql:
systemctl stop mysqldSet the mySQL environment option
systemctl set-environment MYSQLD_OPTS=”–skip-grant-tables”Start mysql usig the options you just set
systemctl start mysqldLogin as root
mysql -u rootUpdate the root user password with these mysql commands
mysql> UPDATE mysql.user SET authentication_string = PASSWORD(‘MyNewPassword’)
-> WHERE User = ‘root’ AND Host = ‘localhost’;
mysql> FLUSH PRIVILEGES;
mysql> quitStop mysql
systemctl stop mysqldUnset the mySQL envitroment option so it starts normally next time
systemctl unset-environment MYSQLD_OPTSStart mysql normally:
systemctl start mysqldTry to login using your new password:
mysql -u root -p
Reference
Note
As of MySQL 5.7.6, for MySQL installation using an RPM distribution, server startup and shutdown is managed by systemd on several Linux platforms. On these platforms, mysqld_safe is no longer installed because it is unnecessary. For more information, see Section 2.5.10, “Managing MySQL Server with systemd”.Which takes you to
http://dev.mysql.com/doc/refman/5.7/en/server-management-using-systemd.html where it mentions the systemctl set-environment MYSQLD_OPTS= towards the bottom of the page