@Hans...
grep -P '^[ \t]*[^#[ \t]+' /etc/apt/sources.list /etc/apt/sources.list.d/*.list
/etc/apt/sources.list:deb http://archive.ubuntu.com/ubuntu xenial main restricted
/etc/apt/sources.list:deb http://archive.ubuntu.com/ubuntu xenial-updates main restricted
/etc/apt/sources.list:deb http://archive.ubuntu.com/ubuntu xenial universe
/etc/apt/sources.list:deb http://archive.ubuntu.com/ubuntu xenial-updates universe
/etc/apt/sources.list:deb http://archive.ubuntu.com/ubuntu xenial multiverse
/etc/apt/sources.list:deb http://archive.ubuntu.com/ubuntu xenial-updates multiverse
/etc/apt/sources.list:deb http://archive.ubuntu.com/ubuntu xenial-backports main restricted universe multiverse
/etc/apt/sources.list:deb http://archive.canonical.com/ubuntu xenial partner
/etc/apt/sources.list:deb-src http://archive.canonical.com/ubuntu xenial partner
/etc/apt/sources.list:deb http://archive.ubuntu.com/ubuntu xenial-security main restricted
/etc/apt/sources.list:deb http://archive.ubuntu.com/ubuntu xenial-security universe
/etc/apt/sources.list:deb http://archive.ubuntu.com/ubuntu xenial-security multiverse
root@dem-gerd-sein-pc:~# apt-cache policy
Paketdateien:
100 /var/lib/dpkg/status
release a=now
500 http://archive.ubuntu.com/ubuntu xenial-security/multiverse i386 Packages
release v=16.04,o=Ubuntu,a=xenial-security,n=xenial,l=Ubuntu,c=multiverse,b=i386
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial-security/multiverse amd64 Packages
release v=16.04,o=Ubuntu,a=xenial-security,n=xenial,l=Ubuntu,c=multiverse,b=amd64
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial-security/universe i386 Packages
release v=16.04,o=Ubuntu,a=xenial-security,n=xenial,l=Ubuntu,c=universe,b=i386
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial-security/universe amd64 Packages
release v=16.04,o=Ubuntu,a=xenial-security,n=xenial,l=Ubuntu,c=universe,b=amd64
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial-security/restricted i386 Packages
release v=16.04,o=Ubuntu,a=xenial-security,n=xenial,l=Ubuntu,c=restricted,b=i386
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial-security/restricted amd64 Packages
release v=16.04,o=Ubuntu,a=xenial-security,n=xenial,l=Ubuntu,c=restricted,b=amd64
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial-security/main i386 Packages
release v=16.04,o=Ubuntu,a=xenial-security,n=xenial,l=Ubuntu,c=main,b=i386
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial-security/main amd64 Packages
release v=16.04,o=Ubuntu,a=xenial-security,n=xenial,l=Ubuntu,c=main,b=amd64
origin archive.ubuntu.com
500 http://archive.canonical.com/ubuntu xenial/partner i386 Packages
release v=16.04,o=Canonical,a=xenial,n=xenial,l=Partner archive,c=partner,b=i386
origin archive.canonical.com
500 http://archive.canonical.com/ubuntu xenial/partner amd64 Packages
release v=16.04,o=Canonical,a=xenial,n=xenial,l=Partner archive,c=partner,b=amd64
origin archive.canonical.com
100 http://archive.ubuntu.com/ubuntu xenial-backports/universe i386 Packages
release v=16.04,o=Ubuntu,a=xenial-backports,n=xenial,l=Ubuntu,c=universe,b=i386
origin archive.ubuntu.com
100 http://archive.ubuntu.com/ubuntu xenial-backports/universe amd64 Packages
release v=16.04,o=Ubuntu,a=xenial-backports,n=xenial,l=Ubuntu,c=universe,b=amd64
origin archive.ubuntu.com
100 http://archive.ubuntu.com/ubuntu xenial-backports/main i386 Packages
release v=16.04,o=Ubuntu,a=xenial-backports,n=xenial,l=Ubuntu,c=main,b=i386
origin archive.ubuntu.com
100 http://archive.ubuntu.com/ubuntu xenial-backports/main amd64 Packages
release v=16.04,o=Ubuntu,a=xenial-backports,n=xenial,l=Ubuntu,c=main,b=amd64
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse i386 Packages
release v=16.04,o=Ubuntu,a=xenial-updates,n=xenial,l=Ubuntu,c=multiverse,b=i386
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 Packages
release v=16.04,o=Ubuntu,a=xenial-updates,n=xenial,l=Ubuntu,c=multiverse,b=amd64
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages
release v=16.04,o=Ubuntu,a=xenial-updates,n=xenial,l=Ubuntu,c=universe,b=i386
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages
release v=16.04,o=Ubuntu,a=xenial-updates,n=xenial,l=Ubuntu,c=universe,b=amd64
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial-updates/restricted i386 Packages
release v=16.04,o=Ubuntu,a=xenial-updates,n=xenial,l=Ubuntu,c=restricted,b=i386
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 Packages
release v=16.04,o=Ubuntu,a=xenial-updates,n=xenial,l=Ubuntu,c=restricted,b=amd64
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages
release v=16.04,o=Ubuntu,a=xenial-updates,n=xenial,l=Ubuntu,c=main,b=i386
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
release v=16.04,o=Ubuntu,a=xenial-updates,n=xenial,l=Ubuntu,c=main,b=amd64
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial/multiverse i386 Packages
release v=16.04,o=Ubuntu,a=xenial,n=xenial,l=Ubuntu,c=multiverse,b=i386
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial/multiverse amd64 Packages
release v=16.04,o=Ubuntu,a=xenial,n=xenial,l=Ubuntu,c=multiverse,b=amd64
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial/universe i386 Packages
release v=16.04,o=Ubuntu,a=xenial,n=xenial,l=Ubuntu,c=universe,b=i386
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
release v=16.04,o=Ubuntu,a=xenial,n=xenial,l=Ubuntu,c=universe,b=amd64
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial/restricted i386 Packages
release v=16.04,o=Ubuntu,a=xenial,n=xenial,l=Ubuntu,c=restricted,b=i386
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial/restricted amd64 Packages
release v=16.04,o=Ubuntu,a=xenial,n=xenial,l=Ubuntu,c=restricted,b=amd64
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial/main i386 Packages
release v=16.04,o=Ubuntu,a=xenial,n=xenial,l=Ubuntu,c=main,b=i386
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
release v=16.04,o=Ubuntu,a=xenial,n=xenial,l=Ubuntu,c=main,b=amd64
origin archive.ubuntu.com
Mit Pinning verwaltete Pakete:
root@dem-gerd-sein-pc:~#
@Taomon
apt-cache policy python-pyqt5 python-pyqt5.qtwebkit python-pyqt5.qtsvg calibre-bin
python-pyqt5:
Installiert: (keine)
Installationskandidat: 5.5.1+dfsg-3ubuntu4
Versionstabelle:
5.5.1+dfsg-3ubuntu4 500
500 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
python-pyqt5.qtwebkit:
Installiert: (keine)
Installationskandidat: 5.5.1+dfsg-3ubuntu4
Versionstabelle:
5.5.1+dfsg-3ubuntu4 500
500 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
python-pyqt5.qtsvg:
Installiert: (keine)
Installationskandidat: 5.5.1+dfsg-3ubuntu4
Versionstabelle:
5.5.1+dfsg-3ubuntu4 500
500 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
calibre-bin:
Installiert: (keine)
Installationskandidat: 2.55.0+dfsg-1
Versionstabelle:
2.55.0+dfsg-1 500
500 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
root@dem-gerd-sein-pc:~#
@ ChickenLipsRfun2eat
Ja, deswegen bin ich ja der Meinung, die Quellen seien gelöscht...