[oracle@11g dbs]$ pwd/home/oracle/app/oracle/product/11.2.0/dbhome_1/dbs[oracle@11g dbs]$ lltotal 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=oracleSQL> 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 orapworclSQL> shutdown immediate;Database closed.Database dismounted.ORACLE instance shut down.SQL> startup;ORACLE instance started.Total System Global Area 835104768 bytesFixed Size 2217952 bytesVariable Size 520095776 bytesDatabase Buffers 310378496 bytesRedo Buffers 2412544 bytesDatabase mounted.Database opened.