The MySQL server crashed when I try to set remote access using 'grant' -

i type commands below:

mysql –u root -p grant privileges on *.* root@”%” identified “rootpassword” grant option; grant privileges on mysitedb.* root@localhost; 

then server crashed：

could not establish database connection. please check username, password , hostname in config file, , if necessary set appropriate mysql user , privileges.

change grand statement in below one, solved:

mysql –u root -p grant privileges on *.* root@”%” identified “rootpassword” grant option; grant privileges on mysitedb.* root@localhost identified “rootpassword” grant option;