，错误是这样的：installArchives() failed: Selecting previously unselected package libept1.4.12.
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(Reading database ... 191337 files and directories currently installed.)
Unpacking libept1.4.12 (from .../libept1.4.12_1.0.9_amd64.deb) ...
Selecting previously unselected package librarian0.
Unpacking librarian0 (from .../librarian0_0.8.1-5build1_amd64.deb) ...
Selecting previously unselected package rarian-compat.
Unpacking rarian-compat (from .../rarian-compat_0.8.1-5build1_amd64.deb) ...
Selecting previously unselected package synaptic.
Unpacking synaptic (from .../synaptic_0.80~exp2_amd64.deb) ...
Processing triggers for doc-base ...
Scrollkeeper was installed, forcing re-registration of all documents.
Unregistering 35 doc-base files, re-registering 35 doc-base files...
Registering documents with scrollkeeper...
Processing triggers for man-db ...
Processing triggers for bamfdaemon ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for desktop-file-utils ...
Processing triggers for gnome-menus ...
Processing triggers for hicolor-icon-theme ...
Setting up jupiter (0.1.11-2) ...
chown: invalid group: :jupiter
dpkg: error processing jupiter (--configure):
subprocess installed post-installation script returned error exit status 1
Setting up libept1.4.12 (1.0.9) ...
No apport report written because MaxReports is reached already
Setting up librarian0 (0.8.1-5build1) ...
Setting up rarian-compat (0.8.1-5build1) ...
Setting up synaptic (0.80~exp2) ...
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
Errors were encountered while processing:
jupiter
Error in function:
Setting up jupiter (0.1.11-2) ...
chown: invalid group: :jupiter
dpkg: error processing jupiter (--configure):
subprocess installed post-installation script returned error exit status 1
