The error message "Can't create test file XXXX.lower-test" typically indicates that the MySQL installation process is encountering a permission issue when trying to create temporary files during the installation.

To address this issue, you can try the following steps:

1. Check Disk Space:

   • Ensure that you have enough free disk space on your server. This error message can sometimes occur if the disk is full or nearly full.

2. Check File and Directory Permissions:

   • Verify that the user running the MySQL installation process has the necessary permissions to create files and directories in the specified location.
   • Make sure the directory where MySQL is being installed has appropriate permissions. You can set the permissions with the following command:
     bash

• • chmod 755 /path/to/mysql/directory
  • Additionally, ensure that the user has write permissions for the specific directory where it's trying to create the test file.

• Verify Ownership:

  • Ensure that the user running the installation process has ownership of the directory. You can change ownership with the following command:
    bash
• • chown -R username:username /path/to/mysql/directory
  • Replace "username" with the actual username.

• Disable SELinux (if applicable):

  • If you're using SELinux, it might be preventing MySQL from creating files. You can temporarily disable SELinux to see if it resolves the issue. Be sure to re-enable it after installation.
    bash
• • setenforce 0

• Specify a Different Temp Directory:

  • You can try specifying a different temporary directory using the --tmpdir option during the MySQL installation process. For example:
    bash