1. mysqld-The MySQL Server
mysqld,also known as mysql server, is the main program that does most of the work in a MySQL installation.
MySQL server manages access to the mysql data dirctory that contains databases and tables,
The data directory is also the default location for other information such as log files and status files.
Note:
Some installation packages contain a debugging versison of the server named mysqld-debug.
invoke this version instead of mysqld for debugging support, memory allocation checking, and trace file support.
When MySQL server starts, it listens for network connections from client programs and manages access to database on behalf of those clients.
The mysqld program has many options that can be specified at startup.
shell> mysqld --verbose --help