The location of MySQL files on a Unix or Linux hard disk depends on how MySQL was installed and configured on the system. Some common locations for MySQL files on Unix and Linux systems include:
/usr/local/mysql/: This is the default installation directory for MySQL on many Unix and Linux systems. The MySQL server, client programs, and support files are usually installed in this directory.
/var/lib/mysql/: This directory contains the data files for the MySQL databases. The data files for each database are stored in a separate subdirectory under this directory.
/etc/mysql/: This directory contains configuration files for the MySQL server and client programs. The main configuration file for the MySQL server is my.cnf.
/var/log/mysql/: This directory contains log files for the MySQL server. The main log file for the MySQL server is mysqld.log.
/usr/share/mysql/: This directory contains documentation and other support files for MySQL.
To find out the exact location of MySQL files on a Unix or Linux system, you can use the locate command. For example, to find all files related to MySQL on the system, you can use the following command:
locate mysql
This will show a list of all files on the system that contain the string "mysql" in their names. You can then look for directories that contain files related to the MySQL server, client programs, data files, and other support files.