The error message indicates that there is a problem with the files list. The files list is updated with:
rpi ~$ sudo apt update
so this is the first you should do. And afterwards it is always a good idea to upgrade your installed software with:
rpi ~$ sudo apt full-upgrade
If this does not help you can try to completely reinitialize the files list.
You normally need to tell clam this is a new install using the freshclam command.
First create the file and dB directory
cp /usr/local/etc/freshclam.conf.sample /usr/local/etc/freshclam.conf
sudo nano /usr/local/etc/freshclam.conf
sudo mkdir /usr/local/share/clamav
Note in the editor set any preferences you want and change the paths on the above command ...
This (whatever it may be) seems to be designed for a 64bit OS. arch=amd64
In general just downloading an app is unlikely to be successful (even if for the correct architecture) unless it is designed for the Pi.
The Foundation spends significant effort producing Pi specific versions.
Like others stated the only option is to copy an OS image or an installation util like NOOBS to the SD Card.
I would recommend to use Etcher for doing so, as it makes this step really easy and Etcher is available for Windows, Linux and MacOS.
However, you can setup your Pi without a Monitor and Keyboard.
Plug the card into your computer and you should be ...
If you know someone who has the same version of Pi that CAN be connected to a monitor and keyboard, you could download the desired raspbian image to an SD card, set it up(including networking--using DHCP or static IP--and enabling SSH), on their Pi. Then power down, pull the SD card and put it in your Pi. Once it boots you should be able to SSH into your Pi. ...
You need to delete your question, and ask it on this SE site instead.
FWIW: You didn't indicate which version of Ubuntu you are using, but that may be an important point. Ubuntu is similar to Raspbian due to their shared Debian heritage, but they are different in many respects also. Your problem certainly sounds like an issue with the repos you ...
I have been affected by Atom problems on my Raspberry Pi 4B too.
I am reposting a question that I submitted to Linux Questions yesterday. Today's reply to that question was about the Package Cloud web site's Raspbian repository possibly being down.
I was able to install 64-bit archlinux on a Raspberry Pi 4 after seeing @VinnieThePooh's answer which contained a link to root filesystems which I then could burn into the SD Card and boot.
Here are the exact steps I took:
1. Insert your SD Card and run blkid to see connected device names:
For me the device name was /dev/sda but it might be ...
You can throw an eye over there: (rootfs, just use it as plain Arch image):
I'm now on 4.19.114 kernel (image from March,8); works quite good, Wifi and Bluetooth are on place (the latter needs a couple of tweaks, of course, but it works at last). Since I had a couple of upgrades, I'm not sure what's ...
The issue here is with numba, as you'll see with the last two lines of the trace:
File "/home/pi/.local/lib/python3.5/site-packages/numba/targets/base.py", line 17, in <module>
from numba import _dynfunc, _helperlib
ImportError: numpy.core.multiarray failed to import
I had this issue myself when installing librosa recently on a Raspberry Pi.