Re: which references (books, web pages, faqs, videos, ...) would you recommend to someone learning about the Linux boot process as thoroughly as possible?
Hi, sonbird wrote: > i was just going to suggest that he clone your brain. :) If brain cloning is a viable option then i propose those of Vladimir Serbinenko and Daniel Kiper because of their experience as maintainers of GRUB. Have a nice day :) Thomas
Re: which references (books, web pages, faqs, videos, ...) would you recommend to someone learning about the Linux boot process as thoroughly as possible?
> I think that at least in the past it was possible to boot Debian Live systems > with `toram` option, too. You should probably just try it out? Well, it seems DL has its own "toram", "fromhd", "bootfrom", ... but not as parameters to be entered right in the first splash screen while it boots up as knoppix does I went google: "debian live toram" looking for something like: http://knoppix.net/wiki3/index.php?title=Cheat_Codes and just found single one page with 77 hits. I tried: "append boot=live", but it didn't work. >live-boot *does* have these options. I've not used those in a while. >'man 7 live-boot' mentions 'toram' and 'fromiso/findiso'. >> I will need to log the boot process to study it. >Perhaps you need 'debug', 'nosplash', and similar boot options. You might not >need to use a serial device. Also for your convenience, run the live image in >e.g. kvm, which simulates a serial device. >See also the latest version of live-manual: >https://live-team.pages.debian.net/live-manual/html/live-manual/index.en.html and, especifically, on chapter: https://live-team.pages.debian.net/live-manual/html/live-manual/overview-of-tools.en.html you find the explanation about how to parametrize the live start up process with lb config, not exactly the start up one liner approach I was very hopefully looking for I used and loved knoppix before there was DL. "Political" and cultural aspects are interesting when it comes to technology. Here are the google hits you get when searching for: knoppix toram: 2580 knoppix bootfrom: 295,000 I like that "bootfrom" iso thing so much, because for more than one good reason I don't like the idea of carrying two laptops around. Even though the "fast start" on Windows would not let you mount its hard drives rw: $ sudo lsblk NAMEMAJ:MIN RM SIZE RO TYPE MOUNTPOINT loop0 7:00 2.1G 1 loop /usr/lib/live/mount/rootfs/filesystem.squashfs sr0 11:01 2.4G 0 rom /usr/lib/live/mount/medium nvme0n1 259:00 238.5G 0 disk ├─nvme0n1p1 259:10 260M 0 part ├─nvme0n1p2 259:2016M 0 part ├─nvme0n1p3 259:30 237.7G 0 part └─nvme0n1p4 259:40 526M 0 part $ sudo blkid | grep ntfs /dev/nvme0n1p3: BLOCK_SIZE="512" UUID="0880083680082CAE" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="a49b734e-47e3-40e5-a8d6-c31b764078ef" /dev/nvme0n1p4: LABEL="Windows RE tools" BLOCK_SIZE="512" UUID="00BC32C0BC32B050" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="8cd3ccd8-fa9e-425f-955d-044324ab52d7" $ sudo mkdir /media/nvme0n1p3 $ sudo mount --verbose --types ntfs /dev/nvme0n1p3 /media/nvme0n1p3 Windows is hibernated, refused to mount. The disk contains an unclean file system (0, 0). Metadata kept in Windows cache, refused to mount. Falling back to read-only mount because the NTFS partition is in an unsafe state. Please resume and shutdown Windows fully (no hibernation or fast restarting.) Could not mount read-write, trying read-only $ sudo umount --verbose /media/nvme0n1p3 umount: /media/nvme0n1p3 unmounted $ There is a way to bypass those kinds of problems when the drive is hybernated but not while it is "fast start(ed)" I would like to place a DL iso in the Windows drive access it ro (in a sense it is better so) and then let the DL DVD know what I need at start up. I used to do exactly this with knoppix just fine, but DL boots on quite literally anything and for some reason I would like to investigate knoppix doesn't. lbrtchx
Re: which references (books, web pages, faqs, videos, ...) would you recommend to someone learning about the Linux boot process as thoroughly as possible?
Thomas Schmitt wrote: ... > If i wanted to expand my knowledge towards x86-related firmware, > bootloaders, and the Linux kernel i would probably begin at > https://en.wikipedia.org/wiki/BIOS > https://uefi.org/specifications > https://git.savannah.gnu.org/cgit/grub.git/tree/ > https://www.kernel.org/doc/html/latest/x86/ > depending on the direction of my expansion. (I wouldn't get far, i guess.) > > > Have a nice day :) i was just going to suggest that he clone your brain. :) songbird
Re: which references (books, web pages, faqs, videos, ...) would you recommend to someone learning about the Linux boot process as thoroughly as possible?
Hi, Albretch Mueller wrote: > imagine you had to code a new bootloader now (as an exercise) in > hindsight which books would you have picked? I only know about the small bridges between computer firmware and the first custom program to be started, which usually is a bootloader. https://dev.lovelyhq.com/libburnia/libisofs/raw/branch/master/doc/boot_sectors.txt If i wanted to expand my knowledge towards x86-related firmware, bootloaders, and the Linux kernel i would probably begin at https://en.wikipedia.org/wiki/BIOS https://uefi.org/specifications https://git.savannah.gnu.org/cgit/grub.git/tree/ https://www.kernel.org/doc/html/latest/x86/ depending on the direction of my expansion. (I wouldn't get far, i guess.) Have a nice day :) Thomas
Re: which references (books, web pages, faqs, videos, ...) would you recommend to someone learning about the Linux boot process as thoroughly as possible?
Albretch Mueller writes: imagine you had to code a new bootloader now (as an exercise) in hindsight which books would you have picked? I do not know of any books about bootloaders, but having a look at multiple different bootloaders (documentation and possibly source code) should be a good way to start? I think GRUB, SYSLINUX, u-boot will cover for a wide variety of boot scenarios? I am OK with Math and technology of any kind and I am more of a Debian kind of guy. In fact, I am amazed at how Debian Live would pretty much boot any piece of sh!t you would feed to it, but, just to mention one case, knoppix would not. But then knoppix, has such super nice boot-up options as: toram (right as a parameter as you boot, no tinkering with any other thing!), fromhd and bootfrom (you can use to put an iso in a I think that at least in the past it was possible to boot Debian Live systems with `toram` option, too. You should probably just try it out? In case the menu does not offer it, consider tinkering with the respective syslinux/isolinux configuration and adding a menu entry with `toram` set? partition of a pen drive, or even stash it in your own work computer, in order to liberate your DVD player after booting), ..., which DL doesn’t have. I think GRUB2 supports this feature, but am not sure if it will work correctly in all of the cases. For my own tinkering I mostly prefer SYSLINUX. It can boot just about any live linux and you can also add `memdisk` images to add DOS and other small systems. [...] I have been always intrigued about such matters and such differences, between what I see as supposedly being standardized, like a boot process. Compare the boot process between amd64 and armhf to find out that there are quite the differences :) HTH Linux-Fan öö pgpVSDkpKfsYh.pgp Description: PGP signature
which references (books, web pages, faqs, videos, ...) would you recommend to someone learning about the Linux boot process as thoroughly as possible?
imagine you had to code a new bootloader now (as an exercise) in hindsight which books would you have picked? I am OK with Math and technology of any kind and I am more of a Debian kind of guy. In fact, I am amazed at how Debian Live would pretty much boot any piece of sh!t you would feed to it, but, just to mention one case, knoppix would not. But then knoppix, has such super nice boot-up options as: toram (right as a parameter as you boot, no tinkering with any other thing!), fromhd and bootfrom (you can use to put an iso in a partition of a pen drive, or even stash it in your own work computer, in order to liberate your DVD player after booting), ..., which DL doesn’t have. I know some RS232/USB converters are not reliable. Which ones do you use? As far as I know laptops don’t come with RS232 anymore. I will need to log the boot process to study it. I have been always intrigued about such matters and such differences, between what I see as supposedly being standardized, like a boot process. lbrtchx
