SQL> alter database archivelog;
alter database archivelog
*
ERROR at line 1:
ORA-00265: instance recovery required, cannot set ARCHIVELOG mode

SQL> shutdown abort;
ORACLE instance shut down.

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.

Total System Global Area  205520896 bytes
Fixed Size                  1218532 bytes
Variable Size              71305244 bytes
Database Buffers          130023424 bytes
Redo Buffers                2973696 bytes
Database mounted.
SQL> alter database archivelog;

Database altered.

SQL> alter database open;

Database altered.

SQL> archive log list;
Database log mode              Archive Mode
Automatic archival             Enabled
Archive destination            /oracle/app/oradata/LARRY/arch1
Oldest online log sequence     184
Next log sequence to archive   186
Current log sequence           186

修改ip地址
即时生效:
# ifconfig eth0 192.168.10.20 netmask 255.255.255.0
启动生效:
修改/etc/sysconfig/network-scripts/ifcfg-eth0

修改default gateway
即时生效:
# route add default gw 192.168.10.216
启动生效:
修改/etc/sysconfig/network-scripts/ifcfg-eth0

修改dns
修改/etc/resolv.conf
修改后可即时生效，启动同样有效

修改host name
即时生效:
# hostname cplatform
启动生效:
修改/etc/sysconfig/network