# apt-rdepends
This helps download apt dependencies and is pretty neat!  I was on a pentest where the Ubuntu box we had did not have general Internet access and I needed to install the `nfs-common` package.  I learned about `apt download` to download packages offline, but the problem was when I went to do `sudo dpkg -i nfs-common.deb` there were a bunch of dependencies that also needed to be installed.

Reading [this page](https://stackoverflow.com/questions/13756800/how-to-download-all-dependencies-and-packages-to-directory) I learned about `apt-rdepends`.

## Install apt-rdepends
```
sudo apt install apt-rdepends
```

## Build an offline install package
Some examples:

### nfs-common
In the case of `nfs-common` I tried this but had issues:

```
apt-get download $(apt-rdepends nfs-common|grep -v "^ ")
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
E: Can't select candidate version from package debconf-2.0 as it has no candidate
E: Can't select candidate version from package mime-support as it has no candidate
```
Reading further into the [StackOverflow](https://stackoverflow.com/questions/13756800/how-to-download-all-dependencies-and-packages-to-directory) article, I modified the command:

```
apt-get download $(apt-rdepends nfs-common|grep -v "^ "| grep -v "^debconf-2.0$" | grep -v "^mime-support$")
```

Back at my airgapped box, I was able to `sudo dpkg -i` for the `rpcbind` and `keyutils` packages that came from my `apt-rdepends` command, and once *that* was done, the install of `nfs-common` completed!  Cool!

### open-iscsi
```
apt-get download $(apt-rdepends open-iscsi|grep -v "^ "| grep -v "^debconf-2.0$" | grep -v "^opensysusers$" | grep -v "^systemd-sysusers$")
```