今天很是鬱悶，服務器用了很長時間都沒有問題。
早上使用過程中發現連接不上，經確認爲機房斷電，發機後主機啓動正常，但是出現數據庫監聽器無法啓動。
主要錯誤和解決過程如下：
[root@bddb 10.2.0]# su - oracle
[oracle@bddb ~]$ lsnrctl status
LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 09-DEC-2011 08:39:29
Copyright (c) 1991, 2007, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=bddb)(PORT=1521)(IP=FIRST)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.100.11)(PORT=1521)(IP=FIRST)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
[oracle@bddb ~]$ exit
logout
[root@bddb 10.2.0]# vi /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
192.168.100.11 bddb bddb
127.0.0.1 bddb localhost
~
~
~
~
"/etc/hosts" 4L, 163C written
[root@bddb 10.2.0]# su - oracle
[oracle@bddb ~]$ lsnrctl start
LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 09-DEC-2011 08:41:35
Copyright (c) 1991, 2007, Oracle. All rights reserved.
TNS-01106: Listener using listener name LISTENER has already been started
