@filename 

executes a series of RMAN commands stored in an operating system file with the specified full pathname, for example, @$ORACLE_HOME/dbs/cmd/cmd1.rman. If you do not specify the full pathname, the current working directory is assumed, for example, @cmd1.rman. Do not use quotes around the string or leave whitespace between the @ and filename. RMAN processes the specified file as if its contents had appeared in place of the @ command.

Note: The file must contain complete RMAN commands; partial commands generate syntax errors. 

@@filename 

is identical to @filename unless used within a script. If contained in a script, @@filename directs RMAN to look for the specified filename in the same path as the command file from which it was called.

For example, assume that your working directory on UNIX is $ORACLE_HOME, and you invoke RMAN as follows:

% rman @$ORACLE_HOME/rdbms/admin/dba/scripts/cmd1.rman 

Assume that the command @@cmd2.rman appears inside the cmd1.rman script. In this case, the @@ command directs RMAN to look for the file cmd2.rman in the directory $ORACLE_HOME/rdbms/admin/dba/scripts. 

exit 

exits Recovery Manager.