Linux下怎么启动、关闭Oracle以及打开关闭监听

Linux下如何启动、关闭Oracle以及打开关闭监听
启动服务
启动监听
关闭监听
关闭服务

[latte@tea ~]$ sqlplus "/as sysdba"

SQL*Plus: Release 12.1.0.2.0 Production on Mon Jul 20 06:54:30 2015

Copyright (c) 1982, 2014, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup
ORACLE instance started.

Total System Global Area 1577058304 bytes
Fixed Size                  2924832 bytes
Variable Size            1023413984 bytes
Database Buffers          536870912 bytes
Redo Buffers               13848576 bytes
Database mounted.
Database opened.
===========================================================================
[latte@tea ~]$ lsnrctl start

LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 20-JUL-2015 06:56:31

Copyright (c) 1991, 2014, Oracle.  All rights reserved.

TNS-01106: Listener using listener name LISTENER has already been started
===========================================================================
[latte@tea ~]$ lsnrctl stop

LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 20-JUL-2015 06:59:12

Copyright (c) 1991, 2014, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=tea)(PORT=1521)))
The command completed successfully
===========================================================================
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.