I installed texlive by downloading, extracting and running `sudo ./install-tl`. 

I want to use tlmgr for installing a package, eg

```
jdoe@jdoe:~$ tlmgr install moderncv
You don't have permission to change the installation in any way,
specifically, the directory /usr/local/texlive/2015/tlpkg/ is not writable.
Please run this program as administrator, or contact your local admin.
tlmgr: An error has occurred. See above messages. Exiting.

```

Now, I guess that it it will run without errors if I use sudo, but I have not tried that. I thought it would install to ~/texmf, which should not require sudo, and that is also what I would prefer.

* Isn't it supposed to install to ~/texmf, and thus not require sudo?
* How do I install to ~/texmf?