oracle启动错误提示---hostname原因导致

#刚开始直接root用户登录,在etc目录,切换到oracle,输入lsnrctl start启动oracle时提示"lsnrctl: command not found"[root@loveyao_test etc]# su oracle[oracle@loveyao_test etc]$ lsnrctl startbash: lsnrctl: command not found

#切换回root用户,cd /根目录, 再次su - oracle ,输入lsnrctl start启动oracle,这次正常啦.[oracle@loveyao_test ~]$ cd /[oracle@loveyao_test /]$ su -rootsu: invalid option -- 'r'Try `su --help' for more information.[oracle@loveyao_test /]$ su - rootPassword: [root@loveyao_test ~]# su - oracle[oracle@loveyao_test ~]$ [oracle@loveyao_test ~]$ lsnrctl startLSNRCTL for Linux: Version 11.2.0.3.0 - Production on 04-JUL-2016 22:06:57Copyright (c) 1991, 2011, Oracle.  All rights reserved.Starting /u01/app/oracle/product/11.2.0/db_1/bin/tnslsnr: please wait...TNSLSNR for Linux: Version 11.2.0.3.0 - ProductionLog messages written to /u01/app/oracle/diag/tnslsnr/loveyao_test/listener/alert/log.xmlError listening on: (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))TNS-12545: Connect failed because target host or object does not exist TNS-12560: TNS:protocol adapter error  TNS-00515: Connect failed because target host or object does not exist   Linux Error: 25: Inappropriate ioctl for deviceListener failed to start. See the error message(s) above...[oracle@loveyao_test ~]$ #如上所示: oracle启动失败,提示"Error listening on: (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))TNS-12545: Connect failed because target host or object does not exist"#hosts文件导致,切换root修改hosts文件,重新启动oracle可以正常启动. 具体操作如下:[oracle@loveyao_test alert]$ su - rootPassword: [root@loveyao_test ~]# [root@loveyao_test ~]# [root@loveyao_test ~]# vi /etc/hosts127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4::1         localhost localhost.localdomain localhost6 localhost6.localdomain6~#将hosts文件localhost 修改成主机名hostname的名字,注意: vi /etc/sysconfig/network 文件可以修改hostname的名字(这里修改后需要重启系统).[root@loveyao_test ~]# vi /etc/hosts127.0.0.1   loveyao_test localhost.localdomain localhost4 localhost4.localdomain4::1         localhost localhost.localdomain localhost6 localhost6.localdomain6~[root@loveyao_test ~]# su - oracle[oracle@loveyao_test ~]$ lsnrctl startLSNRCTL for Linux: Version 11.2.0.3.0 - Production on 04-JUL-2016 22:23:22Copyright (c) 1991, 2011, Oracle.  All rights reserved.Starting /u01/app/oracle/product/11.2.0/db_1/bin/tnslsnr: please wait...TNSLSNR for Linux: Version 11.2.0.3.0 - ProductionLog messages written to /u01/app/oracle/diag/tnslsnr/loveyao_test/listener/alert/log.xmlListening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=loveyao_test)(PORT=1521)))Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))STATUS of the LISTENER------------------------Alias                     LISTENERVersion                   TNSLSNR for Linux: Version 11.2.0.3.0 - ProductionStart Date                04-JUL-2016 22:23:22Uptime                    0 days 0 hr. 0 min. 0 secTrace Level               offSecurity                  ON: Local OS AuthenticationSNMP                      OFFListener Log File         /u01/app/oracle/diag/tnslsnr/loveyao_test/listener/alert/log.xmlListening Endpoints Summary...  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=loveyao_test)(PORT=1521)))The listener supports no servicesThe command completed successfully[oracle@loveyao_test ~]$ #查看oracle监听端口1521[oracle@loveyao_test ~]$ ss -tanlRecv-Q Send-Q               Local Address:Port                 Peer Address:Port 0      128                             :::111                            :::*     0      128                              *:111                             *:*     0      128                             :::1521                           :::*     0      128                             :::25493                          :::*     0      128                             :::22                             :::*     0      128                              *:22                              *:*     0      128                      127.0.0.1:631                             *:*     0      128                            ::1:631                            :::*     0      100                            ::1:25                             :::*     0      100                      127.0.0.1:25                              *:*     0      128                              *:39108                           *:*     [oracle@loveyao_test ~]$