Oracle Startup error Message---hostname cause

#刚开始直接root用户登录, in the ETC directory, switch to Oracle, enter LSNRCTL start to start Oracle prompt "Lsnrctl:command not found" [[Email Protected]_test etc]# Su oracle[[email protected]_test etc]$ lsnrctl startbash:lsnrctl:command not found

#切换回root用户, cd /root directory,  again su - oracle , input lsnrctl start start Oracle, this time it's OK. [[Email protected]_test ~]$ cd /[[email protected]_test /]$ su -rootsu : invalid option --  ' R ' try  ' Su --help '  for more information. [[Email protected]_test /]$ su - rootpassword: [[email protected]_test  ~]# su - oracle[[email protected]_test ~]$ [[email protected]_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 ... [[email protected]_test ~]$  #如上所示:  oracle boot failed with prompt "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, switch root to modify the Hosts file, restart Oracle to start normally .  The operation is as follows: [[EMAIL PROTECTED]_TEST ALERT]$ SU&Nbsp;- rootpassword: [[email protected]_test ~]# [[email protected]_test ~]#  [[email protected]_test ~]# vi /etc/hosts127.0.0.1   localhost  localhost.localdomain localhost4 localhost4.localdomain4::1          localhost localhost.localdomain localhost6 localhost6.localdomain6~# Change the Hosts file localhost  to the name of the hostname hostname, note that: vi /etc/sysconfig/network  file can modify hostname's name ( The system needs to be restarted after this modification). [[email protected]_test ~]# vi /etc/hosts127.0.0.1   loveyao_test  localhost.localdomain localhost4 localhost4.localdomain4::1          localhost localhost.localdomain localhost6 localhost6.localdomain6~[[email  protected]_test ~]# su - oracle[[email protected]_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[[email protected]_test ~]$  #查看oracle监听端口1521 [[email protected]_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                            *:*      [[email  protected]_test ~]$

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Oracle Startup error Message---hostname cause