[oracle@11g dbs]$ pwd
/home/oracle/app/oracle/product/11.2.0/dbhome_1/dbs
[oracle@11g dbs]$ ll
total 24
-rw-rw—-. 1 oracle oinstall 1544 mar 11 13:46 hc_orcl.dat
-rw-r–r–. 1 oracle oinstall 2851 may 15 2009 init.ora
-rw-r—–. 1 oracle oinstall 658 feb 16 05:17 initorcl.ora
-rw-r—–. 1 oracle oinstall 24 feb 16 05:17 lkorcl
-rw-r—–. 1 oracle oinstall 1536 feb 16 05:17 orapworcl
-rw-r—–. 1 oracle oinstall 3584 mar 11 14:19 spfileorcl.ora
[oracle@11g dbs]$ rm -rf *
total 0
[oracle@11g dbs]$ orapwd file=/home/oracle/app/oracle/product/11.2.0/dbhome_1/dbs/orapworcl password=oracle
sql> create pfile from memory;
file created.
[oracle@11g dbs]$ ll
-rw-rw—-. 1 oracle oinstall 1544 mar 11 16:55 hc_orcl.dat
-rw-r–r–. 1 oracle oinstall 5562 mar 11 16:44 initorcl.ora
-rw-r—–. 1 oracle oinstall 24 mar 11 16:55 lkorcl
-rw-r—–. 1 oracle oinstall 1536 mar 11 16:38 orapworcl
sql> shutdown immediate;
database closed.
database dismounted.
oracle instance shut down.
sql> startup;
oracle instance started.
total system global area 835104768 bytes
fixed size 2217952 bytes
variable size 520095776 bytes
database buffers 310378496 bytes
redo buffers 2412544 bytes
database mounted.
database opened.