有用 - Linux下启动/关闭Oracle

# Linux下启动/关闭Oracle
## 一、Linux下启动Oracle

> 　　Linux下启动Oracle分为两步：
>
> 　　1）启动监听；
>
> 　　2）启动数据库实例；
>

### 1、切换用户

1.登录服务器，切换到oracle用户，或者以oracle用户登录

```bash
[admin@dataserver ~]$ su - oracle
# 密码：
[oracle@dataserver ~]$
```



### 2.打开监听服务

```bash
[oracle@localhost ~]$ lsnrctl start

# 可以通过lsnrctl status命令查看Oracle监听器运行状况

[oracle@localhost ~]$ lsnrctl status 
```



### 3.以SYS用户身份登录Oracle

```bash
[oracle@localhost ~]$ sqlplus /nolog

SQL*Plus: Release 11.2.0.1.0 Production on Fri Dec 1 23:29:19 2017 Copyright (c) 1982, 2009, Oracle.  All rights reserved.

SQL> conn /as sysdba
Connected to an idle instance.
```

切换用户：

CONN 用户名/密码 [AS SYSDBA]，如果是sys用户一定要写上AS　SYSDBA

### 4.通过startup命令启动实例

```bash
SQL> startup
ORACLE instance started.

Total System   
... ...Database mounted.
Database opened.
SQL>
```



## 二、Linux下关闭Oracle

### 1.关闭数据库实例

```bash
SQL> shutdown
Database closed.
Database dismounted.
ORACLE instance shut down.  
SQL> quit  
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production  
With the Partitioning, OLAP, Data Mining and Real Application Testing options
```

### 2.关闭监听器

```bash
[oracle@localhost ~]$ lsnrctl stop
```