The PDF format is one of the most common eBook types that you are likely to come across on the Internet. While OS X supports the reading of PDF files using the application Preview, and Apple’s portable devices now have
Extract, Transform, and Load (ETL) is a process in data warehousing that involves
* extracting data from outside sources,
* transforming it to fit business needs (which can include quality levels), and ultimately
* loading it into the end target, i.e. the data warehouse.
Extract the PKCS#7 object:
$ openssl smime -verify -in file.msg -noverify -pk7out > file.pk7
Dump the certificates in that file
openssl pkcs7 -print_certs -in file.pk7 > file.pem
Open the file in your favorite text editor and seperate out each certificate individually in to it's own file and import:
For each CA certificate that you want to trust:
smime_keys add_root file.pem
Note: You do not need to trust all intermediate CAs. You can simply trust the end-user certificate.
For the subject certificate that you want to add:
smime_keys add_cert file.pem
rpm2cpio ./packagecloud-test-1.1-1.x86_64.rpm | cpio -idmv
An RPM package is simply a header structure on top of a CPIO archive. The package itself is comprised of four sections: a header with a leading identifier (magic number) that identifies the file as an RPM package, a signature to verify the integrity of the package, the header or ‘tagged’ data containing package information, version numbers, and copyright messaging, and the archive containing the actual program files.
In the example above, we use cpio with the -i flag to extract the files from the archive, -d to create the leading directories where needed, and -m to preserve the file modification times when creating files. The -v flag (verbose) is to list the files processed for the sake of this example.
Autojar dient dazu, jar-Archive minimaler Größe aus unterschiedlichen Qellen (eigenen Klassen, Verzeichnissen, Archiven) zu erzeugen. Ausgehend von einer oder mehreren Klassen wird der Bytecode rekursiv nach weiteren benutzten Klassen durchsucht; diese werden ggf. aus ihrem Archiv extrahiert und in die Ausgabedatei übernommen. Das resultierende Archiv enthält alle tatsächlich benutzten Klassen, und nur diese. Somit lassen sich z.B. Größe und Ladezeit von Applets klein halten oder Applikationen unabhängig von installierten Bibliotheken machen.