Oracle with SYS and SYSTEM default password logon prompt ORA-01017: invalidusername/passwor

Oracle with SYS and SYSTEM default password logon prompt ORA-01017: invalidusernamepassword; logonddenied solved

Oracle with SYS and SYSTEM default password logon prompt ORA-01017: invalid username/password; logond denied solved

Environment: Oracle 11g R2 + SQLPlus

Problem: ORACLE with SYS and SYSTEM default password logon prompt ORA-01017: invalidusername/password; logond denied

We all know that the default password of sys is manager and the default password of system is change_on_install. Why can't I log on normally with the default password? After the installation, it can run normally. after a long time of no use, it cannot be used. That's strange. However, you can use the following solution.

Solution:

Win + Run -------> Cmd -------> enter the following command:

Of course, you can also change it to a password that you can easily remember.

Summary: sys and system are not the administrators with the largest database permissions in Oracle, and '/' is the administrator. When using this user to log on, you can avoid entering a password to connect directly to Oracle. After Oracle is installed, you can still connect and change the password even if you forget all the user passwords. That is to say, Whoever installs the software legally will have the permanent right to use the software. Do you know this is correct? Welcome to shoot bricks.

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