You don’t need libcurl-dev, that’s only needed if you write software and need to compile against it. It contains headers and stubs.
And guys: Use linux commands, don’t blindly install stuff.
Here’s what libraries are configured/installed on my machine:
# ldconfig -p | grep libcurl
libcurl.so.4 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libcurl.so.4
libcurl-gnutls.so.4 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libcurl-gnutls.so.4
and to find out which package provides a particular file:
# dpkg -S libcurl
libcurl3:amd64: /usr/lib/x86_64-linux-gnu/libcurl.so.3
libcurl3:amd64: /usr/lib/x86_64-linux-gnu/libcurl.so.4
libcurl3:amd64: /usr/lib/x86_64-linux-gnu/libcurl.so.4.3.0
libcurl3-gnutls:amd64: /usr/lib/x86_64-linux-gnu/libcurl-gnutls.so.3
libcurl3-gnutls:amd64: /usr/lib/x86_64-linux-gnu/libcurl-gnutls.so.4
libcurl3-gnutls:amd64: /usr/lib/x86_64-linux-gnu/libcurl-gnutls.so.4.3.0
Since it needs libcurl.so.4: libcurl3 depending on which distro you have.