1.Question describe
when you use account scott/tiger connect to oracle, you will see "the user account is locked",
because you did't unlock the account when you install the oracle.
2.Solution:
~login in account system/Cnblogs1900 (the password is setted when you installl the oracle)
~alter user scott account unlock;(you will see ,user has changed.)
~commit;(you will see , commit finished)
~conn scott/tiger(you will see, the password has expired, and change the password, please input the new password)
~(after you set the password, you can connect with the user scott account)