E: Package 'libssl1.1' has no installation candidate

Question

sudo apt-get install libssl1.1

Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package libssl1.1 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or is only available from another source

E: Package 'libssl1.1' has no installation candidate

Answer 1

sudo -i
wget http://archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2_amd64.deb
sudo dpkg -i libssl1.1_1.1.1f-1ubuntu2_amd64.deb

Answer 2

1. Go to http://archive.ubuntu.com/ubuntu/pool/main/o/openssl
2. find the exact version of libssl for example libssl1.1.1
3. wget http://archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1-1ubuntu2.1\~18.04.20_amd64.deb
4. Then install
5. sudo dpkg -i libssl1.1_1.1.1-1ubuntu2.1~18.04.20_amd64.deb