$ apt policy
Package files:
 100 /var/lib/dpkg/status
     release a=now
 500 http://dl.google.com/linux/chrome/deb stable/main amd64 Packages
     release v=1.0,o=Google, Inc.,a=stable,n=stable,l=Google,c=main,b=amd64
     origin dl.google.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
 500 http://us.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 us.archive.ubuntu.com
Pinned packages: