Does apt-get have a command to build a package for chroot?

Question

linux

It is necessary to download all the libs, and unpack everything into one folder.

Answer 1

download via apt-get with the -d (download only) option
will download packages to a local directory.
install via dpkg --root=/path/to/dir

Answer 2

As far as I know, apt-get can't do that, but dpkg has --instdir=dir and --unpack options, maybe this will allow you to do what you need.