How to start multiple Oracle instances on Linux

In Linux, how does one start multiple Oracle instances? I believe that many beginners of Oracle will encounter this type of problem. I will give a brief introduction below.

1. Switch Oracle users:

# Su oracle

2. Switch to the Oracle directory:

# Cd $ oracle_home

3. Execute the configuration file. bash_profile

[Oracle @ db ~] $. Bash_profile

4. Check whether the parameter has been configured successfully.

Echo $ oracle_home

Echo $ oracle_sid

5. Start the database instance

# Sqlplus/nolog

# Conn/as sysdba

# Startup

# Exit

6. Start the listener

Execute lsnrctl start

7. Start another database and modify the parameters first.

Export ORACLE_SID = devdb

Repeat Step 4-6.

From gavinloo's column