Hot Backup
1)usage
1@@@@hot mean online.
@@@the hot backup meaning you could copy your datafile to other directory
@@@for save. but one thing, if you want to recovery using these files.
@@@you must use cold recovery operation.
@@@Note: if outage when you are running the hot backup, you must end it first
@@@before you recover instance.
####begin####################################################
[oracle@station3 ~]$ cat hot_backup.sql 
#!/bin/sh
sqlplus /nolog << !
conn /as  sysdba
alter tablespace system begin backup;
quit
!
 
cp /u01/app/oracle/oradata/orcl/system01.dbf /home/oracle/system01.dbf
 
sqlplus /nolog << EOF
conn /as sysdba
alter tablespace system end backup;
quit
EOF
######end##################################################