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How to reset Mysql Password on CPanel Server through Command line

How to reset Mysql Password on CPanel Server through Command line

There is 2 issues - why can't I log in as root to start with, and why can I not use 'mysqld_safe` to start mySQL to reset the root password.
I have no answer to setting up the root password during installation, but here's what you do to reset the root password
Edit the initial root password on install can be found by running
grep 'temporary password' /var/log/mysqld.log

  1. 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)
  2. The user table structure has changed.
So to reset the root password, you still start mySQL with --skip-grant-tables options and update the user table, but how you do it has changed.
1. Stop mysql:
systemctl stop mysqld

2. Set the mySQL environment option 
systemctl set-environment MYSQLD_OPTS="--skip-grant-tables"

3. Start mysql usig the options you just set
systemctl start mysqld

4. Login as root
mysql -u root

5. Update the root user password with these mysql commands
mysql> UPDATE mysql.user SET authentication_string = PASSWORD('MyNewPassword')
    -> WHERE User = 'root' AND Host = 'localhost';
mysql> quit

*** Edit ***
As mentioned my shokulei in the comments, for 5.7.6 and later, you should use 
   mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass';
Or you'll get a warning

6. Stop mysql
systemctl stop mysqld

7. Unset the mySQL envitroment option so it starts normally next time
systemctl unset-environment MYSQLD_OPTS

8. Start mysql normally:
systemctl start mysqld

Try to login using your new password:
7. mysql -u root -p
Try to login using your new password:
8. open /root/.my.cnf and update password for CPanel to work efficiently 
according to new password

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