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- .. SPDX-License-Identifier: GPL-2.0+:
- bootmeth command
- ================
- Synopis
- -------
- ::
- bootmeth list [-a] - list selected bootmeths (-a for all)
- bootmeth order "[<bm> ...]" - select the order of bootmeths\n"
- Description
- -----------
- The `bootmeth` command is used to manage bootmeths. It can list them and change
- the order in which they are used.
- See :doc:`../../develop/bootstd` for more information.
- .. _bootmeth_order:
- bootmeth order
- ~~~~~~~~~~~~~~
- Selects which bootmeths to use and the order in which they are invoked. When
- scanning bootdevs, each bootmeth is tried in turn to see if it can find a valid
- bootflow. You can use this command to adjust the order or even to omit some
- boomeths.
- The argument is a quoted list of bootmeths to use, by name. If global bootmeths
- are included, they must be at the end, otherwise the scanning mechanism will not
- work correctly.
- bootmeth list
- ~~~~~~~~~~~~~
- This lists the selected bootmeths, or all of them, if the `-a` flag is used.
- The format looks like this:
- ===== === ================== =================================
- Order Seq Name Description
- ===== === ================== =================================
- 0 0 extlinunx Extlinux boot from a block device
- 1 1 efi EFI boot from an .efi file
- 2 2 pxe PXE boot from a network device
- 3 3 sandbox Sandbox boot for testing
- glob 4 efi_mgr EFI bootmgr flow
- ===== === ================== =================================
- The fields are as follows:
- Order:
- The order in which these bootmeths are invoked for each bootdev. If this
- shows as a hyphen, then the bootmeth is not in the current ordering. If it
- shows as 'glob', then this is a global bootmeth and should be at the end.
- Seq:
- The sequence number of the bootmeth, i.e. the normal ordering if none is set
- Name:
- Name of the bootmeth
- Description:
- A friendly description for the bootmeth
- Example
- -------
- This shows listing bootmeths. All are present and in the normal order::
- => bootmeth list
- Order Seq Name Description
- ----- --- ------------------ ------------------
- 0 0 distro Extlinux boot from a block device
- 1 1 efi EFI boot from an .efi file
- 2 2 pxe PXE boot from a network device
- 3 3 sandbox Sandbox boot for testing
- 4 4 efi_mgr EFI bootmgr flow
- ----- --- ------------------ ------------------
- (5 bootmeths)
- Now the order is changed, to include only two of them::
- => bootmeth order "sandbox distro"
- => bootmeth list
- Order Seq Name Description
- ----- --- ------------------ ------------------
- 0 3 sandbox Sandbox boot for testing
- 1 0 distro Extlinux boot from a block device
- ----- --- ------------------ ------------------
- (2 bootmeths)
- The -a flag shows all bootmeths so you can clearly see which ones are used and
- which are not::
- => bootmeth list -a
- Order Seq Name Description
- ----- --- ------------------ ------------------
- 1 0 distro Extlinux boot from a block device
- - 1 efi EFI boot from an .efi file
- - 2 pxe PXE boot from a network device
- 0 3 sandbox Sandbox boot for testing
- - 4 efi_mgr EFI bootmgr flow
- ----- --- ------------------ ------------------
- (5 bootmeths)
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