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makedeltarpm(8) [centos man page]

MAKEDELTARPM(8) 					      System Manager's Manual						   MAKEDELTARPM(8)

makedeltarpm - create a deltarpm from two rpms SYNOPSIS
makedeltarpm [-v] [-V version] [-z compression] [-m mbytes] [-s seqfile] [-r] [-u] oldrpm newrpm deltarpm makedeltarpm [-v] [-V version] [-z compression] [-s seqfile] [-u] -p oldrpmprint oldpatchrpm oldrpm newrpm deltarpm DESCRIPTION
makedeltarpm creates a deltarpm from two rpms. The deltarpm can later be used to recreate the new rpm from either filesystem data or the old rpm. Use the -v option to make makedeltarpm more verbose about its work (use it twice to make it even more verbose). If you want to create a smaller and faster to combine "rpm-only" deltarpm which does not work with filesystem data, specify the -r option. makedeltarpm 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 new rpm. The -s option makes makedeltarpm write out the sequence id to the specified file seqfile. If you also use patch rpms you should use the -p option to specify the rpm-print of oldrpm and the created patch rpm. This option tells makedeltarpm to exclude the files that were not included in the patch rpm but are not byteswise identical to the ones in oldrpm. makedeltarpm can also create an "identity" deltarpm by adding the -u switch. In this case only one rpm has to be specified. An identity deltarpm can be useful to just replace the signature header of a rpm or to reconstruct a rpm from the filesystem. MEMORY CONSIDERATIONS
makedeltarpm normally needs about three to four times the size of the rpm's uncompressed payload. You can use the -m option to enable a sliding block algorithm that needs mbytes megabytes of memory. This trades memory usage with the size of the created deltarpm. Furthermore, the uncompressed deltarpm payload is currently also stored in memory when this option is used, but it tends to be small in most cases. SEE ALSO
applydeltarpm(8) combinedeltarpm(8) AUTHOR
Michael Schroeder <mls@suse.de> Jul 2010 MAKEDELTARPM(8)

Check Out this Related Man Page

RPMKEYS(8)						      System Manager's Manual							RPMKEYS(8)

rpmkeys - RPM Keyring SYNOPSIS
rpmkeys {--import|--checksig} DESCRIPTION
The general forms of rpm digital signature commands are rpmkeys --import PUBKEY ... rpmkeys {-K|--checksig} PACKAGE_FILE ... The --checksig option checks all the digests and signatures contained in PACKAGE_FILE to ensure the integrity and origin of the package. Note that signatures are now verified whenever a package is read, and --checksig is useful to verify all of the digests and signatures associated with a package. Digital signatures cannot be verified without a public key. An ASCII armored public key can be added to the rpm database using --import. An imported public key is carried in a header, and key ring management is performed exactly like package management. For example, all cur- rently imported public keys can be displayed by: rpm -qa gpg-pubkey* Details about a specific public key, when imported, can be displayed by querying. Here's information about the Red Hat GPG/DSA key: rpm -qi gpg-pubkey-db42a60e Finally, public keys can be erased after importing just like packages. Here's how to remove the Red Hat GPG/DSA key rpm -e gpg-pubkey-db42a60e SEE ALSO
popt(3), rpm(8), rpmdb(8), rpmsign(8), rpm2cpio(8), rpmbuild(8), rpmspec(8), rpmkeys --help - as rpm supports customizing the options via popt aliases it's impossible to guarantee that what's described in the manual matches what's available. http://www.rpm.org/ <URL:http://www.rpm.org/> AUTHORS
Marc Ewing <marc@redhat.com> Jeff Johnson <jbj@redhat.com> Erik Troan <ewt@redhat.com> Panu Matilainen <pmatilai@redhat.com> Red Hat, Inc 29 October 2010 RPMKEYS(8)
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