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Update PACKAGERS.md with some text changes, including and especially moving "LXC" to a new "Optional Dependencies" section 

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)
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Tianon Gravi 2014-03-04 21:25:00 -07:00
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@ -142,30 +142,46 @@ dependencies to be installed (see below).
The test suite will also download a small test container, so you will need internet connectivity.
## Runtime dependencies
## Dependencies
### Runtime
To run properly, docker needs the following software to be installed at runtime:
* iproute2 version 3.5 or later (build after 2012-05-21), and specifically the "ip" utility
* iptables version 1.4 or later
* The LXC utility scripts (http://lxc.sourceforge.net) version 0.8 or later
* Git version 1.7 or later
* XZ Utils 4.9 or later
## Kernel dependencies
### Kernel
Docker in daemon mode has specific kernel requirements. For details, see
http://docs.docker.io/en/latest/installation/kernel/
Docker in daemon mode has specific kernel requirements. Most pre-packaged
kernels include the necessary options enabled. If you are building your own
kernel, you will either need to discover the options necessary via trial and
error, or check out the [Gentoo
ebuild](https://github.com/tianon/docker-overlay/blob/master/app-emulation/docker/docker-9999.ebuild),
in which a list is maintained.
Note that Docker also has a client mode, which can run on virtually any linux kernel (it even builds
on OSX!).
### Optional
Some of Docker's features are activated by using optional command-line flags or
by having support for them in the kernel or userspace. A few examples include:
* LXC execution driver (requires version 0.8 or later of the LXC utility scripts)
* AUFS graph driver (requires AUFS patches/support enabled in the kernel, and at
least the "auplink" utility from aufs-tools)
* BTRFS graph driver (requires BTRFS support enabled in the kernel)
## Init script
Docker expects to run as a daemon at machine startup. Your package will need to include a script
for your distro''s process supervisor of choice.
for your distro's process supervisor of choice. Be sure to check out the
"contrib/init" folder in case a suitable init script already exists!
Docker should be run as root, with the following arguments:
In general, Docker should be run as root, with the following arguments:
```bash
docker -d