I am new to ubuntu and installed MySQL use a rpm file,
and started it use sudo start mysql, when i try

mysqladmin -u root password test

I get

mysqladmin: connect to server at 'localhost' failed

error: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)'

Check that mysqld is running and that the socket: '/var/run/mysqld/mysqld.sock' exists!

I checked the mysqld folder and there is nothing

what can i do the next? Thanks for your answers