需要必须掌握的命令，上周遇到了一个小问题，就是需要重启数据库监听，有的同学竟然使用oracle用户重启监听，原理就搞错了怎么行。以下操作都需要再grid用户下进行操作。

1、查看监听状态

$srvctl status listener

Listener LISTENER is enabled

Listener LISTENER is running on node(s): roidb1,roidb2

$srvctl status scan_listener

SCAN Listener LISTENER_SCAN1 is enabled

SCAN listener LISTENER_SCAN1 is running on node roidb2

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2、关闭监听

$srvctl stop listener -n roidb1

$srvctl status listener -n roidb1

Listener LISTENER is enabled on node(s): roidb1

Listener LISTENER is not running on node(s): roidb1

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$srvctl stop scan_listener

$srvctl status scan_listener

SCAN Listener LISTENER_SCAN1 is enabled

SCAN listener LISTENER_SCAN1 is not running

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3、启动监听

$srvctl status listener

Listener LISTENER is enabled

Listener LISTENER is running on node(s): roidb1,roidb2

$srvctl status scan_listener

SCAN Listener LISTENER_SCAN1 is enabled

SCAN listener LISTENER_SCAN1 is running on node roidb2

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