Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  libiscsi7 librados2 librbd1
The following NEW packages will be installed:
  libiscsi7 librados2 librbd1 qemu-block-extra
0 upgraded, 4 newly installed, 0 to remove and 0 not upgraded.
Need to get 3,624 kB/3,719 kB of archives.
After this operation, 16.0 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Err:1 http://archive.linux.duke.edu/ubuntu bionic-updates/main amd64 librados2 amd64 12.2.12-0ubuntu0.18.04.4
  404  Not Found [IP: 152.3.102.53 80]
Err:2 http://archive.linux.duke.edu/ubuntu bionic-updates/main amd64 librbd1 amd64 12.2.12-0ubuntu0.18.04.4
  404  Not Found [IP: 152.3.102.53 80]
E: Failed to fetch http://archive.linux.duke.edu/ubuntu/pool/main/c/ceph/librados2_12.2.12-0ubuntu0.18.04.4_amd64.deb  404  Not Found [IP: 152.3.102.53 80]
E: Failed to fetch http://archive.linux.duke.edu/ubuntu/pool/main/c/ceph/librbd1_12.2.12-0ubuntu0.18.04.4_amd64.deb  404  Not Found [IP: 152.3.102.53 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?