Ubuntu Manpage: bootcd2disk - copy a system running from bootcd to a disk

NAME

       bootcd2disk - copy a system running from bootcd to a disk

SYNOPSIS

       bootcd2disk [-i|-s|-m] [-d debug_runtime_config] -- [-h|--help]
              [-c|--conf   CONF]   [-y|--yes]   [-url  url]  [--only_mount]  [--only_unmount]  [--only_copydata]
              [--only_sync]      [-p|--only_print_options]]      [-o|--use_originaldiskname]      [-z|--zerodsk]
              [--variable_from_bootcd2disk.conf(5) value] [--function_from_bootcd2disk.conf(5) definition]

DESCRIPTION

       bootcd2disk  is used to write a running system to disk.  It was originally used do write a running bootcd
       built with bootcdwrite to disk, but it is also possible to write a system directly to an attached disk.

       The system can be copied to one or more disk partitions seen by the running system.   When  running  from
       bootcd,  it  is possible to let bootcd2disk automatically find a disk, make partitions on it, copy the cd
       to the disk and make the disk bootable.

OPTIONS

-i|-s|-m|-d debug_runtime_config
Run bootcdwrite in interactive, silent, minimal control or debug mode. See shellia(1) for this
standard shellia options.

-c|--conf CONF
use the bootcdwrite config options from file CONF. Default:

CONF=/etc/bootcd/bootcd2disk.conf

-h|--help
print help and exit

-o|--use_originaldiskname
if bootcd2disk.conf was created by bootcdmk2diskconf, not only the variable DISK0 is defined as auto
but also ORIG_DISK0 is defined with the original device. To use it this option exists.

-y|--yes
answer always yes

-url url
If bootcd2disk is slow on your system (because of a slow CD/DVD drive or the HP ILO virtual CD
interface), you can use an image server to get the bootcd iso image from. The swap partition of the
installed system will be used as temporary space for the iso image.

The image server url is configured with this option. Example:

bootcd2disk -url http://192.168.1.1/cdimage.iso

Another way the increase the performance is the use of the mounted CD/DVD itself for the copy.
Example:

bootcd2disk -url file:///dev/sdc0

The swap partition of the upcoming system must have enough space to get the whole image!

--only_mount
After bootcd2disk did partition, format and install the disk, the disks can be mounted again with this
option. For example to run update-grub in chroot on the mounted disk:
# remount disks to /mnt/bootcd.disc/ bootcd2disk --only_mount

# prepare chroot mount --bind /dev /mnt/bootcd.disc/dev mount -t proc none /mnt/bootcd.disc/proc
mount -t sysfs none /mnt/bootcd.disc/sys mount -t devpts none /mnt/bootcd.disc/dev/pts

# run update-grub in chroot chroot /mnt/bootcd.disc update-grub

--only_unmount
If the disks are mounted with option --only_mount , they can be unmounted with this option.

--only_copydata
This will not create partitions, but only copy data to the directory COPYDEST defined with --COPYDEST
COPYDEST. Filesystems have to be mounted before. The Bootloader will not be activated.

-p|--only_print_options
Print the options calculated from defaults, config-file and commandline and exit.

Hint: This option may display more information about defined functions in a non-bash environment, if
calling bash bootcd2disk -p ....

-z|--zerodsk
This option writes zeros to the beginning of a disk before using it.

--variable_from_bootcd2disk.conf(5) value
variables listed in bootcd2disk.conf(5) can be overwritten from command line. For example a variable
called VARIABLE will get the value VALUE with the option: --VARIABLE VALUE

--function_from_bootcd2disk.conf(5) definition
functions listed in bootcd2disk.conf(5) can be overwritten from command line. For example a function
fun() { echo "hello world"; } could be defined with the option: --fun 'fun() { echo "hello world"; }'

--only_sync
To use this option, bootcd2disk should have been run before, because the target disk should be
partitioned and formatted already. With ---only_sync only the steps needed to sync will be done.
That means the target disc will be mounted, the files will be synced, the bootloader will be activated
and the target disk will be unmounted.

ENV

       All variables, that can be given as OPTIONS or in the bootcd2disk.conf  file,  will  not  be  taken  form
       Environment variables.

       Only the following variables will be set as Environment variables.

       LUKS_PASSWD
          This  variable contains the luks passphrase. It is used to initialize luks partitions and to open luks
          partitions. If this variable is not  set  in  the  envrionment  it  will  be  asked  interactively  by
          bootcd2disk if needed.

AUTHOR

       bernd.schumacher@hpe.com

       License: GNU General Public License, version 3

COPYRIGHT

       Bernd Schumacher <bernd.schumacher@hpe.com> (2007-2020)

0.1                                                2020-08-07                                     BOOTCD2DISK(1)