z999@hudson101:~$ sudo apt-get update
[sudo] password for z999:
Ign:1 http://dl.google.com/linux/talkplugin/deb stable InRelease
Hit:3 http://us.archive.ubuntu.com/ubuntu xenial InRelease
Get:2 http://dl.google.com/linux/talkplugin/deb stable Release [1,347 B]
Get:4 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease [94.5 kB]
Get:5 http://dl.google.com/linux/talkplugin/deb stable Release.gpg [198 B]
Get:6 http://archive.canonical.com/ubuntu xenial InRelease [11.5 kB]
Hit:7 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease
Get:8 http://security.ubuntu.com/ubuntu xenial-security InRelease [94.5 kB]
Get:9 http://archive.canonical.com/ubuntu xenial/partner Sources [2,236 B]
Get:10 http://us.archive.ubuntu.com/ubuntu xenial-updates/main Sources [67.1 kB]
Get:11 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe Sources [25.0 kB]
Get:12 http://us.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages [207 kB]
Get:13 http://archive.canonical.com/ubuntu xenial/partner i386 Packages [3,020 B]
Get:14 http://us.archive.ubuntu.com/ubuntu xenial-updates/main Translation-en [79.8 kB]
Get:15 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages [87.9 kB]
Get:16 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe Translation-en [43.5 kB]
Get:17 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe i386 DEP-11 Metadata [18.7 kB]
Get:18 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe DEP-11 64x64 Icons [48.8 kB]
Fetched 785 kB in 1s (513 kB/s)
Reading package lists... Done
W: http://dl.google.com/linux/talkplugin/deb/dists/stable/Release.gpg: Signature by key 4CCA1EAF950CEE4AB83976DCA040830F7FAC5991 uses weak digest algorithm (SHA1)
E: Failed to fetch http://dl.google.com/linux/talkplugin/deb/dists/stable/Release No Hash entry in Release file /var/lib/apt/lists/partial/dl.google.com_linux_talkplugin_deb_dists_stable_Release which is considered strong enough for security purposes
E: Some index files failed to download. They have been ignored, or old ones used instead.