List of backupsets
To list summary of backup
List a particular backup set if you know the backup set number
RMAN> list backupset;list complete backup
RMAN> list backup;
To list summary of backup
RMAN> list backup summary;
List a particular backup set if you know the backup set number
RMAN> list backupset backupset#;
RMAN> list backupset 12;
RMAN> list backupset tag 'tagname';
RMAN> list backup of datafile #;
RMAN> list incarnations;