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# Support a new distro
## Global variables
- ``ROOTPATH``: root of a USB stick mountpoint
- ``KERNELDIR``: the place to install the kernel
- ``DATADIR``: the place to install other data files, e.g. squashfs, iso files
- ``ISOMNT``: the mount point that the iso file is mounted to with ``mount_iso``
## How to support
You can refer to [Arch Linux](distro/arch/). What you need is:
- ``install.sh``: a script file describing how to install the LiveCD to USB
- ``isoinfo``: all info about the iso file, including where to download it, the hash checksum, and a mirror list
- ``entry*`` files: an example is [Arch Linux x86\_64](distro/arch/entry1), for more detail, look into [mkgrubcfg.sh](mkgrubcfg.sh)
In ``isoinfo``, ``ISOURL`` is the relative path to a mirror that shows the URL of the Live ISO file. You can use ``SHA256``,``SHA1`` or ``MD5`` for iso file checksum. ``install_live`` in ``install.sh`` is the bash function that handles the install of the Live ISO to the USB stick.
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