问题描述：
在启动数据库时，出现ORA-00600错误，具体错误信息如下所示。其中数据库版本为10.2.0.1.0。
ORA-00600: internal error code, arguments: [keltnfy-ldmInit], [46], [1], [], [], [], [], []
首先，检查alert警告日志。检查错误信息。错误信息如下：
Mon Nov 21 13:49:08 2016
Errors in file /home/oracle/oracle/product/10.2.0/db_1/admin/orcl/udump/orcl_ora_5698.trc:
ORA-00600: internal error code, arguments: [keltnfy-ldmInit], [46], [1], [], [], [], [], []
USER: terminating instance due to error 600
Instance terminated by USER, pid = 5698
PMON started with pid=2, OS id=5703
PSP0 started with pid=3, OS id=5705
MMAN started with pid=4, OS id=5707
Mon Nov 21 13:50:18 2016
ORA-00130: invalid listener address '(ADDRESS=(PROTOCOL=TCP)(HOST=bogon)(PORT=1521))'
DBW0 started with pid=5, OS id=5711
DBW1 started with pid=6, OS id=5713
LGWR started with pid=7, OS id=5715
CKPT started with pid=8, OS id=5717
Mon Nov 21 13:50:38 2016
Errors in file /home/oracle/oracle/product/10.2.0/db_1/admin/orcl/bdump/orcl_smon_5719.trc:
ORA-00600: internal error code, arguments: [keltnfy-ldmInit], [46], [1], [], [], [], [], []
Mon Nov 21 13:50:39 2016
Errors in file /home/oracle/oracle/product/10.2.0/db_1/admin/orcl/bdump/orcl_smon_5719.trc:
ORA-00600: internal error code, arguments: [keltnfy-ldmInit], [46], [1], [], [], [], [], []
Mon Nov 21 13:50:39 2016
SMON: terminating instance due to error 474
Instance terminated by SMON, pid = 5719其次，一看到ORA-00600错误，先使用MOS上的Look-up工具检查错误。
参考：文档 ID 153788.1：ORA-600/ORA-7445/ORA-700 Error Look-up Tool
ORA-600 [keltnfy-ldminit] (文档 ID 462888.1)
Startup Database Produces ORA-00600: [Keltnfy-Ldminit] (文档 ID 336447.1)
MOS上的文档（5486074.8）
ORA-600 [keltnfy-ldminit] can occur in the Server Generated Alert
subsystem when it cannot determine the Host Name or
Network Address. This can be caused by DNS server being unavailable.
通过对MOS官方文档的阅读，可以定位到是hostname或者DNS名称ping不通。并且尝试ping bogon主机名，发现是Ping不通。因此可以确认主机名被修改过，而在10.2.0.1版本中，修改主机名会导致数据库无法启动。因此就出现上面的错误。
检查一下/etc/sysconfig/network，发现hostname没有完全修改过来。
# cat /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=localhost.localdomain调整HOSTNAME=bogon，同时在/etc/hosts里增加Hostname和IP地址。
# cat /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=no
#HOSTNAME=localhost.localdomain
HOSTNAME=bogon重新启动数据库，日志显示实例正常mount，正常恢复数据，并打开数据库。
Mon Nov 21 16:37:41 2016
Starting ORACLE instance (normal)
Mon Nov 21 16:37:47 2016
Database mounted in Exclusive Mode
Completed: ALTER DATABASE MOUNT
Mon Nov 21 16:37:56 2016
Completed: ALTER DATABASE OPEN