--- name: "applydeltarpm" section: "8" platform: "linux" package: "deltarpm" version: "3.6.5+dfsg-1+b1" release: "Debian 13 (Trixie)" platforms: ["linux"] url: "https://new.carta.tech/applydeltarpm" --- # applydeltarpm(8) reconstruct an rpm from a deltarpm ## NAME applydeltarpm - reconstruct an rpm from a deltarpm ## SYNOPSIS **applydeltarpm** \[**-v**\] \[**-p**\] \[**-r** *oldrpm*\] *deltarpm* *newrpm*\ **applydeltarpm** **-c**\|**-C** *deltarpm*\ **applydeltarpm** \[**-c**\|**-C**\] **-s** *sequence*\ **applydeltarpm** **-i** *deltarpm* ## DESCRIPTION applydeltarpm applies a binary delta to either an old rpm or to on-disk data to re-create a new rpm. The old rpm can be specified with the **-r** option, if no rpm name is provided on-disk data is used. You can use **-p** to make applydeltarpm print the percentage of completion, or **-v** to make it more verbose about its operation. The second and third form can be used to check if the reconstruction is possible. It may fail if the on-disk data was changed (deltarpms are created in a way that config file changes do not matter) or the deltarpm does not match the rpm the delta was generated with. The **-c** option selects full (i.e. slow) on-disk checking, whereas **-C** only checks if the filesizes have not changed. Instead of a full deltarpm a sequence id can be given with the **-s** *sequence* option. Such an id contains all the information that is needed to do reconstruction checking. Finally information about a deltarpm can be printed with the **-i** option. ## MEMORY CONSIDERATIONS applydeltarpm was written to work on systems with limited memory. It uses a paging algorithm to keep the size of in-core data low and not bring the system in an out-of-memory situation. ## EXIT STATUS applydeltarpm returns 0 if the rpm could be recreated or the checking succeeded, it returns 1 and prints an error message to stderr if something failed. ## SEE ALSO [**makedeltarpm**(8)](/makedeltarpm/8.md), [**rpm**(8)](/rpm/8.md) ## AUTHOR Michael Schroeder \