ubuntu@ubuntu:~$ cat /etc/apt/sources.list
deb cdrom:[Ubuntu 18.04.2 LTS _Bionic Beaver_ - Release amd64 (20190210)]/ bionic main restricted
deb http://si.archive.ubuntu.com/ubuntu/ bionic main restricted universe
deb http://security.ubuntu.com/ubuntu/ bionic-security main restricted
deb http://si.archive.ubuntu.com/ubuntu/ bionic-updates main restricted universe

ubuntu@ubuntu:~$ sudo apt-get update 
Ign:1 cdrom://Ubuntu 18.04.2 LTS _Bionic Beaver_ - Release amd64 (20190210) bionic InRelease
Hit:2 cdrom://Ubuntu 18.04.2 LTS _Bionic Beaver_ - Release amd64 (20190210) bionic Release
Get:3 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]              
Get:5 http://si.archive.ubuntu.com/ubuntu bionic InRelease [242 kB]                               
Get:6 http://si.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Get:7 http://si.archive.ubuntu.com/ubuntu bionic/main amd64 Packages [1019 kB]
Get:8 http://si.archive.ubuntu.com/ubuntu bionic/main Translation-en [516 kB]
Get:9 http://si.archive.ubuntu.com/ubuntu bionic/main amd64 DEP-11 Metadata [477 kB]
Get:10 http://si.archive.ubuntu.com/ubuntu bionic/main DEP-11 48x48 Icons [118 kB]
Get:11 http://si.archive.ubuntu.com/ubuntu bionic/main DEP-11 64x64 Icons [245 kB]
Get:12 http://si.archive.ubuntu.com/ubuntu bionic/restricted amd64 Packages [9184 B]
Get:13 http://si.archive.ubuntu.com/ubuntu bionic/restricted Translation-en [3584 B]
Get:14 http://si.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages [8570 kB]
Get:15 http://si.archive.ubuntu.com/ubuntu bionic/universe Translation-en [4941 kB]
Get:16 http://si.archive.ubuntu.com/ubuntu bionic/universe amd64 DEP-11 Metadata [3287 kB]
Get:17 http://si.archive.ubuntu.com/ubuntu bionic/universe DEP-11 48x48 Icons [2151 kB]
Get:18 http://si.archive.ubuntu.com/ubuntu bionic/universe DEP-11 64x64 Icons [8420 kB]
Get:19 http://si.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages [676 kB]
Get:20 http://si.archive.ubuntu.com/ubuntu bionic-updates/main Translation-en [249 kB]
Get:21 http://si.archive.ubuntu.com/ubuntu bionic-updates/main amd64 DEP-11 Metadata [284 kB]
Get:22 http://si.archive.ubuntu.com/ubuntu bionic-updates/main DEP-11 48x48 Icons [66.7 kB]
Get:23 http://si.archive.ubuntu.com/ubuntu bionic-updates/main DEP-11 64x64 Icons [134 kB]
Get:24 http://si.archive.ubuntu.com/ubuntu bionic-updates/restricted amd64 Packages [6996 B]
Get:25 http://si.archive.ubuntu.com/ubuntu bionic-updates/restricted Translation-en [3076 B]
Get:26 http://si.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages [964 kB]
Get:27 http://si.archive.ubuntu.com/ubuntu bionic-updates/universe Translation-en [287 kB]
Get:28 http://si.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 DEP-11 Metadata [249 kB]
Get:29 http://si.archive.ubuntu.com/ubuntu bionic-updates/universe DEP-11 48x48 Icons [201 kB]
Get:30 http://si.archive.ubuntu.com/ubuntu bionic-updates/universe DEP-11 64x64 Icons [422 kB]
Fetched 33.7 MB in 5s (6384 kB/s)                                  
Reading package lists... Done