approximately the same as the software itself, e.g., `barnowl` or `gdb`
or `libwww-mechanize-ruby`. You can use the command `dpkg -S` to figure
out where a file comes from, or search on
-[packages.debian.org](http://packages.debian.org/) or
-[packages.ubuntu.com](http://packages.ubuntu.com/).
+[packages.debian.org](https://packages.debian.org/) or
+[packages.ubuntu.com](https://packages.ubuntu.com/).
2. Type `apt-get source` followed by the package name. This will
download the source package.
You can find more information about writing Debian or Ubuntu packages in
[Ubuntu's packaging guide](https://wiki.ubuntu.com/PackagingGuide) or
-SIPB's [packaging tutorial](http://debathena.mit.edu/packaging/) on the
+SIPB's [packaging tutorial](https://debathena.mit.edu/packaging/) on the
Debathena website.