Original data directory /var/lib/mysql is not empty!

It seems that you are encountering an issue where the original data directory "/var/lib/mysql" is not empty. This can happen if there are existing files or directories present in that location before attempting to use it for MySQL.

To resolve this issue, you have a few options:

1. Backup and remove existing data: If you don't need the existing data, you can back it up and then remove all the files and directories within the "/var/lib/mysql" directory. You can use the following commands to perform this:

sudo service mysql stop
sudo mv /var/lib/mysql /var/lib/mysql_backup
sudo mkdir /var/lib/mysql
sudo chown -R mysql:mysql /var/lib/mysql
sudo service mysql start

Please note that this will delete all the existing data, so make sure to back it up if you need it.

2. Specify a different data directory: If you want to keep the existing data intact, you can configure MySQL to use a different data directory. To do this, you need to edit the MySQL configuration file (usually located at "/etc/mysql/my.cnf" or "/etc/my.cnf") and change the "datadir" parameter to a different directory path. After making the change, restart MySQL for the new configuration to take effect.

sudo nano /etc/mysql/my.cnf
# Find the line starting with "datadir" and change its value to a new directory path
sudo service mysql restart

Remember to ensure that the new directory has sufficient permissions for the MySQL user.

By following one of these approaches, you should be able to resolve the issue of the original data directory not being empty.