dpkg
und es apt-get
gibt zwei verschiedene Möglichkeiten, Software zu installieren. Grundsätzlich basieren apt-get, aptitude und synaptic auf dem dpkg-Paketverwaltungsprogramm von debian. Sie alle führen dieselbe Grundfunktion aus - die Paketverwaltung, verfügen jedoch über einige zusätzliche Funktionen. Eine der zusätzlichen Funktionen von apt-get ist, dass es Abhängigkeiten installiert und dpkg nicht.
In Bezug auf -p / purge ...
Das -P
in dpkg
bedeutet --purge
und entfernt alles, einschließlich Einstellungen und Konfigurationsdateien. Aus dem Handbuch:
-r, --remove, -P, --purge package...|-a|--pending
Remove an installed package. -r or --remove remove everything
except conffiles. This may avoid having to reconfigure the pack‐
age if it is reinstalled later. (Conffiles are configuration
files that are listed in the DEBIAN/conffiles control file). -P
or --purge removes everything, including conffiles. If -a or
--pending is given instead of a package name, then all packages
unpacked, but marked to be removed or purged in file
/var/lib/dpkg/status, are removed or purged, respectively. Note:
some configuration files might be unknown to dpkg because they
are created and handled separately through the configuration
scripts. In that case, dpkg won't remove them by itself, but the
package's postrm script (which is called by dpkg), has to take
care of their removal during purge. Of course, this only applies
to files in system directories, not configuration files written
to individual users' home directories.
Removing of a package consists of the following steps:
1. Run prerm script
2. Remove the installed files
3. Run postrm script
Das gleiche gilt für purge
in apt-get
.
remove
remove is identical to install except that packages are removed
instead of installed. Note the removing a package leaves its
configuration files in system. If a plus sign is appended to the
package name (with no intervening space), the identified package
will be installed instead of removed.
purge
purge is identical to remove except that packages are removed and
purged (any configuration files are deleted too).
Grundsätzlich ist es die gleiche Option. Wohlgemerkt: Das Entfernen von Abhängigkeiten erfolgt mit dpkg nicht. apt-get entfernt Abhängigkeiten
Dokumentation aus Kommentar von Lekensteyn: