1. Reference original installation:
https://blog.csdn.net/projectNo/article/details/76533921
2. The first time link database, note the following:
1. window + r to enter sqlplus carriage carrying the pop-up window on the client
2. Enter any password + as sysdba to link to the database
3. Do not add as sysdba will always prompt: the addount is locked
4.alter user system account unlock; # 解锁system
5.alter user scott identified by pwd; # scott user to set a password
6. common oracle auxiliary command:
show user # to view the current user
conn user / pwd # switch user
7.oracle if the link is broken and wrong and oracle database implementation, re-link as follows:
conn [ect] username / password [as sysdba | as sysoper] # [] as an optional command
8.password command to change the password
password + # to modify the user name to the current user to modify without entering a user name.