Heck yeah! Finally! Thank you for this.
I had the same issue:
"error while loading shared libraries: libssl.so.1.0.0: cannot open shared object file: No such file or directory"
Using the link by ahasvuerus -
wget http://security.ubuntu.com/ubuntu/pool/main/o/openssl1.0/libssl1.0.0_1.0.2n-1ubuntu5.3_amd64.deb
sudo apt install ./libssl1.0.0_1.0.2n-1ubuntu5.3_amd64.deb
And finally, after that you can install the rstudio-server-1.3.959 version
@mohammadreza , I see that your error is looking for libssl1.0.2. If you download 1.3.959 server version I think you'll be good to go 