combinedeltarpm creates a new deltarpm from multiple old ones.
Applying the rsulting deltarpm has the same effect as applying
each of the old ones in the specified order. Use the
-v option to make combinedeltarpm more verbose about its work.
combinedeltarpm normally produces a V3 format deltarpm, use the
-V option to specify a different version if desired. The
-z option can be used to specify a different compression method, the
default is to use the same compression method as used in the
last of the old deltarpms.
If you want to use a different header
signature you can also specify a rpm with the
-S option which will be used as signature reference. This feature can
be used to if a deltarpm was made against an unsigned rpm which
later got signed.