命令：
lsnrctl start
参考如下：
SQL> startup ORA-01031: insufficient privileges SQL> startup ORA-32004: obsolete or deprecated parameter(s) specified for RDBMS instance ORA-01081: cannot start already-running ORACLE - shut it down first [oracle@localhost ~]$ lsnrctl start LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 19-OCT-2012 10:56:01 Copyright (c) 1991, 2009, Oracle. All rights reserved. Starting /home/oracle/app/product/11.2.0/db_1/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 11.2.0.1.0 - Production System parameter file is /home/oracle/app/product/11.2.0/db_1/network/admin/listener.ora Log messages written to /home/oracle/app/diag/tnslsnr/localhost/listener/alert/log.xml Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost.localdomain)(PORT=1521))) Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost.localdomain)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production Start Date 19-OCT-2012 10:56:04 Uptime 0 days 0 hr. 0 min. 0 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /home/oracle/app/product/11.2.0/db_1/network/admin/listener.ora Listener Log File /home/oracle/app/diag/tnslsnr/localhost/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost.localdomain)(PORT=1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) The listener supports no services The command completed successfully [oracle@localhost ~]$ lsnrctl start LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 19-OCT-2012 10:59:33 Copyright (c) 1991, 2009, Oracle. All rights reserved. TNS-01106: Listener using listener name LISTENER has already been started