Date: Fri, 06 Nov 2015 17:43:29 -0500 Subject: convert documentation to texinfo --- (limited to 'docs/gnulinux/grub_config.html') diff --git a/docs/gnulinux/grub_config.html b/docs/gnulinux/grub_config.html deleted file mode 100644 index 9cc0d77..0000000 --- a/docs/gnulinux/grub_config.html +++ /dev/null @@ -1,223 +0,0 @@ - - - - - - - - - Writing a GRUB configuration file - - - -

Writing a GRUB configuration file

- This section is for those systems which use the GRUB payload. - If your system uses the depthcharge payload, ignore this section. -

- Back to index -

- -

- Example modifications for grubtest.cfg -
- Trisquel GNU/Linux-libre
- Parabola GNU/Linux-libre
-

- -

Example modifications for grubtest.cfg

- -

- These are some common examples of ways in which the grubtest.cfg file can be modified. -

- -

Obvious option: don't even modify the built-in grub.cfg

- Use the menuentry that says something like Search for GRUB outside CBFS. Assuming that you - have a grub.cfg file at /boot/grub/ in your installed distro, this will generate a new menuentry in - the GRUB menu. Use that to boot. -

- Then do this as root:
- $ cd /boot/grub/
- $ ln -s grub.cfg libreboot_grub.cfg -

- After that, your system should then boot automatically. -

- -

Trisquel with full disk encryption, custom partition layout

- GRUB can boot from a symlink (or symlinks) pointing to your kernel/initramfs, whether from an unencrypted or encrypted /boot/. You - can create your own custom symlink(s) but you have to manually update them when updating your kernel. This guide (not maintained by - the libreboot project) shows how to configure Trisquel to automatically update that symlink on every kernel update. - http://www.rel4tion.org/people/fr33domlover/libreboot-fix/ -

- TODO: adapt those notes and put them here. The author said that it was CC-0, so re-licensing under GFDL shouldn't be a problem. -

- -

Trisquel GNU/Linux-libre

- -

- As an example, on my test system in /boot/grub/grub.cfg (on the HDD/SSD) I see for the main menu entry: -

linux /boot/vmlinuz-3.15.1-gnu.nonpae root=UUID=3a008e14-4871-497b-95e5-fb180f277951 ro crashkernel=384M-2G:64M,2G-:128M quiet splash $vt_handoff
initrd /boot/initrd.img-3.15.1-gnu.nonpae

- -

- ro, quiet, splash, crashkernel=384M-2G:64M,2G-:128M and - $vt_handoff can be safely ignored. -

- -

- I use this to get my partition layout:
- $ lsblk -

- -

- In my case, I have no /boot partition, instead /boot is on the same partition as / on sda1. - Yours might be different. In GRUB terms, sda means ahci0. 1 means msdos1, or gpt1, depending - on whether I am using MBR or GPT partitioning. Thus, /dev/sda1 is GRUB is (ahci0,msdos1) or - (ahci0,gpt1). In my case, I use MBR partitioning so it's (ahci0,msdos1). - 'msdos' is a GRUB name simply because this partitioning type is traditionally used by MS-DOS. - It doesn't mean that you have a proprietary OS. -

- -

- Trisquel doesn't keep the filenames of kernels consistent, instead it keeps old kernels and - new kernel updates are provided with the version in the filename. This can make GRUB payload - a bit tricky. Fortunately, there are symlinks /vmlinuz and /initrd.img - so if your /boot and / are on the same partition, you can set GRUB to boot from that. - These are also updated automatically when installing kernel updates from your distributions - apt-get repositories. - - Note: when using jxself kernel releases, - these are not updated at all and you have to update them manually. - -

- -

- For the GRUB payload grubtest.cfg (in the 'Load Operating System' menu entry), we therefore have (in this example):
- set root='ahci0,msdos1'
- linux /vmlinuz root=UUID=3a008e14-4871-497b-95e5-fb180f277951
- initrd /initrd.img -

- -

- Optionally, you can convert the UUID to its real device name, for example /dev/sda1 in this case. - sdX naming isn't very reliable, though, which is why UUID is used for most distributions. -

- -

- Alternatively, if your /boot is on a separate partition then you cannot rely on the /vmlinuz and /initrd.img symlinks. - Instead, go into /boot and create your own symlinks (update them manually when you install a new kernel update).
- $ sudo -s (or su -)
- # cd /boot/
- # rm -f vmlinuz initrd.img
- # ln -s yourkernel ksym
- # ln -s yourinitrd isym
- # exit -

- -

- Then your grubtest.cfg menu entry (for payload) becomes like that, for example if / was on sda2 and /boot was on sda1:
- set root='ahci0,msdos1'
- linux /ksym root=/dev/sda2
- initrd /isym -

- -

- There are lots of possible variations so please try to adapt. -

- -

Parabola GNU/Linux-libre

- -

- You can basically adapt the above. Note however that Parabola does not keep old kernels still installed, and the file names - are always consistent, so you don't need to boot from symlinks, you can just use the real thing directly. -

- -

- Back to top of page. -

- -

- Copyright © 2014, 2015 Francis Rowe <info@gluglug.org.uk>
- Permission is granted to copy, distribute and/or modify this document - under the terms of the GNU Free Documentation License, Version 1.3 - or any later version published by the Free Software Foundation; - with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. - A copy of the license can be found at ../gfdl-1.3.txt -

- -

- Updated versions of the license (when available) can be found at - https://www.gnu.org/licenses/licenses.html -

- -

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