oracle怎么修改实例名

SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

[oracle@wgx ~]$ vim .bash_profile
export ORACLE_BASE=/usr/local/oracle
export ORACLE_HOME=$ORACLE_BASE/product/11.2.0/db_1
##############################################################
#####   修改环境变量ORACLE_SID的取值为book
export ORACLE_SID=book
##############################################################
export ORACLE_OWNER=oracle
export PATH=$PATH:$ORACLE_HOME/bin:$HOME/bin
alias sqlplus='rlwrap sqlplus'
alias rman='rlwrap rman'
alias lsnrctl='rlwrap lsnrctl'
[oracle@wgx ~]$ source .bash_profile

[oracle@wgx dbs]$ ls
hc_DBUA0.dat  hc_orcl.dat  init.ora  lkBOOK  lkBOOKS  lkMYDB  lkORCL  orapworcl  spfileorcl.ora
[oracle@wgx dbs]$ pwd
/usr/local/oracle/product/11.2.0/db_1/dbs
[oracle@wgx dbs]$ mv orapworcl orapwbook
[oracle@wgx dbs]$ mv spfileorcl.ora spfilebook.ora
[oracle@wgx dbs]$ ls
hc_DBUA0.dat  hc_orcl.dat  init.ora  lkBOOK  lkBOOKS  lkMYDB  lkORCL  orapwbook  spfilebook.ora