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前提回现
修改了主机名，由hyldb修改为hyl。
问题现象
配置监听，警告提示，如下所示：
解决方法
1、检查1521端口
[root@hyl ~]# netstat -a
--查看端口占用情况，查明1521端口并未被占用
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 localhost.localdomain:2208 *:* LISTEN
tcp 0 0 *:sunrpc *:* LISTEN
tcp 0 0 *:pftp *:* LISTEN
tcp 0 0 localhost.localdomain:ipp *:* LISTEN
tcp 0 0 localhost.localdomain:smtp *:* LISTEN
tcp 0 0 localhost.localdomain:2207 *:* LISTEN
tcp 0 0 *:ssh *:* LISTEN
getnameinfo failed
getnameinfo failed
tcp 0 132 [UNKNOWN]:ssh [UNKNOWN]:51492 ESTABLISHED
udp 0 0 *:spmp *:*
udp 0 0 *:659 *:*
udp 0 0 *:37437 *:*
udp 0 0 *:mdns *:*
udp 0 0 *:sunrpc *:*
udp 0 0 *:ipp *:*
udp 0 0 *:mdns *:*
udp 0 0 *:32372 *:*
Active UNIX domain sockets (servers and established)
Proto RefCnt Flags Type State I-Node Path
unix 2 [ ACC ] STREAM LISTENING 4226 @ISCSIADM_ABSTRACT_NAMESPACE
unix 2 [ ACC ] STREAM LISTENING 4938 /var/run/dbus/system_bus_socket
unix 2 [ ACC ] STREAM LISTENING 7578 @/tmp/fam-root-
unix 2 [ ACC ] STREAM LISTENING 5021 /var/run/sdp
unix 2 [ ACC ] STREAM LISTENING 5102 /var/run/pcscd.comm
unix 2 [ ACC ] STREAM LISTENING 5127 /var/run/acpid.socket
unix 2 [ ACC ] STREAM LISTENING 6197 /var/run/cups/cups.sock
unix 2 [ ACC ] STREAM LISTENING 6633 /var/run/avahi-daemon/socket
unix 2 [ ACC ] STREAM LISTENING 6473 /dev/gpmctl
unix 2 [ ACC ] STREAM LISTENING 4212 @ISCSID_UIP_ABSTRACT_NAMESPACE
unix 2 [ ] DGRAM 1102 @/org/kernel/udev/udevd
unix 2 [ ACC ] STREAM LISTENING 6509 /tmp/.font-unix/fs7100
unix 2 [ ACC ] STREAM LISTENING 7135 /tmp/.gdm_socket
unix 2 [ ACC ] STREAM LISTENING 7165 /tmp/.X11-unix/X0
unix 2 [ ] DGRAM 5161 @/org/freedesktop/hal/udev_event
unix 17 [ ] DGRAM 4527 /dev/log
unix 2 [ ACC ] STREAM LISTENING 5152 @/var/run/hald/dbus-R5ibTGYpjn
unix 2 [ ACC ] STREAM LISTENING 5153 @/var/run/hald/dbus-1m4p21ErfG
unix 2 [ ACC ] STREAM LISTENING 4482 /var/run/audispd_events
unix 2 [ ] DGRAM 7618
unix 3 [ ] STREAM CONNECTED 7581 @/tmp/fam-root-
unix 3 [ ] STREAM CONNECTED 7580
unix 3 [ ] STREAM CONNECTED 7571 /var/run/dbus/system_bus_socket
unix 3 [ ] STREAM CONNECTED 7570
unix 3 [ ] STREAM CONNECTED 7448 /tmp/.X11-unix/X0
unix 3 [ ] STREAM CONNECTED 7447
unix 3 [ ] STREAM CONNECTED 7364 /tmp/.X11-unix/X0
unix 3 [ ] STREAM CONNECTED 7363
unix 3 [ ] STREAM CONNECTED 7261 /tmp/.font-unix/fs7100
unix 3 [ ] STREAM CONNECTED 7260
unix 3 [ ] STREAM CONNECTED 7217 /var/run/pcscd.comm
unix 3 [ ] STREAM CONNECTED 7216
unix 3 [ ] STREAM CONNECTED 7264 /tmp/.X11-unix/X0
unix 3 [ ] STREAM CONNECTED 7190
unix 3 [ ] STREAM CONNECTED 7177 /var/run/acpid.socket
unix 3 [ ] STREAM CONNECTED 7176
unix 2 [ ] DGRAM 7163
unix 3 [ ] STREAM CONNECTED 6636 /var/run/dbus/system_bus_socket
unix 3 [ ] STREAM CONNECTED 6635
unix 3 [ ] STREAM CONNECTED 6630
unix 3 [ ] STREAM CONNECTED 6629
unix 2 [ ] DGRAM 6627
unix 2 [ ] DGRAM 6467
unix 2 [ ] DGRAM 6426
unix 2 [ ] DGRAM 6379
unix 2 [ ] DGRAM 6324
unix 2 [ ] DGRAM 6109
unix 2 [ ] DGRAM 6068
unix 2 [ ] DGRAM 5958
unix 3 [ ] STREAM CONNECTED 5930 /var/run/dbus/system_bus_socket
unix 3 [ ] STREAM CONNECTED 5929
unix 3 [ ] STREAM CONNECTED 5903 @/var/run/hald/dbus-R5ibTGYpjn
unix 3 [ ] STREAM CONNECTED 5902
unix 3 [ ] STREAM CONNECTED 5896 |