No, fetching genesis.json from other running nodes is not supported. The genesis block is a starting point of verifying all following blocks, and it needs a manual verification by its design. It's not difficult to make an remote API to extract genesis.json from existing blocks.log, but I don't think it would be added to nodeos soon.
In snapshot, you can have ...
Manually install the missing package with these commands:
sudo dpkg -i ./libicu60_60.2-3ubuntu3.1_amd64.deb
Then you can install EOSIO prebuilt binaries for Ubuntu 18.04 from the releases page on a new Ubuntu version 20.04
This solution was found in a github ...
You need to build eos by yourself, or can use my personal package archive (for development purpose only).
sudo add-apt-repository ppa:conr2d/eosio
sudo apt install eosio
It wasn't built on cloned github repository, so its version will be shown 'unknown', but is 'v2.0.7'. (Originally the version of nodeos will be grabbed from github tags)
The version of ...