Ubuntu 16.04 When I restore my system from backup after system fault, I got broken apt. When I trying use apt, for example: $ sudo apt install pyroom Setting up python3 (3.5.1-3) ... running python rtupdate hooks for python3.5... dpkg-query: package 'rhythmbox-plugins' is not installed Use dpkg --info (= dpkg-deb --info) to examine archive files, and dpkg --contents (= dpkg-deb --contents) to list their contents. Traceback (most recent call last): File "/usr/bin/py3clean", line 210, in <module> main() File "/usr/bin/py3clean", line 196, in main pfiles = set(dpf.from_package(options.package)) File "/usr/share/python3/debpython/files.py", line 53, in from_package raise Exception("cannot get content of %s" % package_name) Exception: cannot get content of rhythmbox-plugins error running python rtupdate hook rhythmbox-plugins dpkg: error processing package python3 (--configure): subprocess installed post-installation script returned error exit status 4 Errors were encountered while processing: python3 E: Sub-process /usr/bin/dpkg returned an error code (1) When I check my apt list: $ apt list python3.5 Listing... Done python3.5/xenial-updates,xenial-security,now 3.5.2-2ubuntu0~16.04.1 amd64 [installed,automatic] When I try reconfigure, I got errors: $ sudo dpkg --configure -a Setting up python3 (3.5.1-3) ... running python rtupdate hooks for python3.5... dpkg-query: package 'rhythmbox-plugins' is not installed Use dpkg --info (= dpkg-deb --info) to examine archive files, and dpkg --contents (= dpkg-deb --contents) to list their contents. Traceback (most recent call last): File "/usr/bin/py3clean", line 210, in <module> main() File "/usr/bin/py3clean", line 196, in main pfiles = set(dpf.from_package(options.package)) File "/usr/share/python3/debpython/files.py", line 53, in from_package raise Exception("cannot get content of %s" % package_name) Exception: cannot get content of rhythmbox-plugins error running python rtupdate hook rhythmbox-plugins dpkg: error processing package python3 (--configure): subprocess installed post-installation script returned error exit status 4 dpkg: dependency problems prevent processing triggers for gnome-menus: gnome-menus depends on python3:any (>= 3.1~); however: Package python3 is not configured yet. dpkg: error processing package gnome-menus (--configure): dependency problems - leaving triggers unprocessed Errors were encountered while processing: python3 gnome-menus What can I do to fix that? Continue reading...