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NiceGuy Guru
Joined: 12 Jun 2006 Posts: 451 Location: Canada
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Posted: Mon May 11, 2009 8:22 pm Post subject: [SOLVED]HOWTO liveUSB with grub and serial console support |
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Hi everyone,
Just wanted to know if it was possible to convert the isolinux boot loader on the Gentoo minimal liveCD to the grub boot loader?
I would like to make a liveUSB.
Thanks _________________ success is the ability to go from one failure to the next without any loss of enthusiasm
Last edited by NiceGuy on Tue May 12, 2009 6:56 pm; edited 2 times in total |
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booleandomain n00b
Joined: 02 May 2009 Posts: 62
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Posted: Mon May 11, 2009 8:43 pm Post subject: |
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I think all you have to do is:
1) mount the .iso image to /mnt/cdrom or something like that
2) mount your usb flash drive partition to /mnt/usb or something like that
3) copy everything from /mnt/cdrom to /mnt/usb
4) emerge --config grub and insert /mnt/usb as the path where to install files
5) configure /mnt/usb/boot/grub/grub.conf |
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neysx Retired Dev
Joined: 27 Jan 2003 Posts: 795
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Posted: Mon May 11, 2009 10:51 pm Post subject: |
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Use unetbootin |
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NiceGuy Guru
Joined: 12 Jun 2006 Posts: 451 Location: Canada
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Posted: Tue May 12, 2009 6:48 pm Post subject: |
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Hi everyone,
I am spending sometime this afternoon closing some of my posts and passing on the information to all gentoo users. I decided to rename this post to "Build a gentoo liveUSB with grub serial console support".
My GOAL was to build a Gentoo LiveUSB that utilizes grub as its boot loader (not isolinux, etxlinux etc ... ) and with Serial Console support and Grub Serial Console Support (both @115200 baud)
Assumptions
* Note I assume your usb is /dev/sdb (changw where appropriate)
** Note I assume your usbstick is mounted at /media/disk (change where appropriate)
Prepare USB :
For < 4Gig USB disk
Code: | user@laptop$ mkdosfs -F 16 /dev/sdb1 |
For >= 4Gig USB disk
Code: | user@laptop$ mkdosfs -F 32 /dev/sdb1 |
First, to get grub the cd I had to remaster the iso
1. Download gentoo.iso
2. mount gentoo.iso /mnt/isoimage/ -t iso9660 -o loop
3. cp -rf /mnt/isoimage/* /media/disk
4. umount /mnt/isoimage
5. cd /media/disk
6. mkdir -p /home/squashfs
7. mkdir -p /mnt/newsquashfs
8. mount -t squashfs -o loop /media/disk/image.squashfs /mnt/newsquashfs
9. cp -rf /mnt/newsquashfs/* /home/newsquashfs
10. umount /mnt/squashfs
11. Edit /home/newsquashfs/etc/securetty to:
12. Edit /home/newsquashfs/etc/inittab
Code: | #SERIAL CONSOLE
s0:12345:respawn:/sbin/agetty -nl /bin/bashlogin 115200 ttyS0 vt100 |
13. cd /media/disk
14. rm image.squashfs
15 mksquashfs /home/newsquashfs image.squashfs
16. verify /media/disk
Code: | ls -l
username@laptop:$ ls /media/disk
gentoo.efimg gentoo.efimg.mountPoint image.squashfs isolinux livecd |
17. For completness say hi to your cd/usb kernel ... labeled "gentoo" inside isolinux folder
Code: | user@laptop:$ ls /media/disk/isolinux
boot.cat elilo.efi gentoo gentoo.igz isolinux.bin isolinux.cfg memtest86 System.map-gentoo |
18. From the home Gentoo system copy over the boot folder into /media/disk (aka usb) directory -- special thanks to DONAHUE from Goose Creek SC for step 16
Code: | user@laptop:$ cp -rf /boot .
echo "usbstick" > /media/disk/boot/grub/usbstick
ls -l /media/disk # verify boot folder copied
ls -l /media/disk/boot # verify the boot folder contents
ls -l /media/disk/boot/grub # verify the /boot/grub contents
grub
find /boot/usbstick
# return should be formatted like (hdx,y)
root (hdx,y) # substitute the returned digits for x,y
setup (hdx) # substitute the returned digits for x
quit |
19. For this post ... verify /media/disk structure .. note the new boot directory added to the /media/disk folder
Code: | name@laptop:/media/disk$ ls
boot gentoo.efimg gentoo.efimg.mountPoint image.squashfs isolinux livecd |
20. USB directory structure (/media/disk/boot)
Code: |
user@laptop:/media/usbdisk/boot$ ls
grub usbstick |
21. USB directory structure (/media/disk/boot/grub)
Code: | name@laptop:/media/usbdisk/boot/grub$ ls
e2fs_stage1_5 ffs_stage1_5 grub.conf jfs_stage1_5 minix_stage1_5 stage1 stage2_eltorito vstafs_stage1_5
fat_stage1_5 glidevice.map iso9660_stage1_5 menu.lst reiserfs_stage1_5 stage2 ufs2_stage1_5 xfs_stage1_5 |
20. Edit liveUSB /media/disk/boot/grub/grub.conf and /media/disk/boot/grub/menu.lst
Code: | serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1
terminal --timeout=15 serial console
default 0
timeout 10
title=USB disk - Serial Console
root(hd0,0)
kernel /isolinux/gentoo root=/dev/ram0 init=/linuxrc slowusb looptype=squashfs loop=/image.squashfs cdroot console=ttyS0,115200
initrd /isolinux/gentoo.igz
title=USB disk - Terminal
root(hd0,0)
kernel /isolinux/gentoo root=/dev/ram0 init=/linuxrc slowusb looptype=squashfs loop=/image.squashfs cdroot vga=791
initrd /isolinux/gentoo.igz |
21. For gentoo forum completeness:
Of course I still had to modify the /etc/securetty to allow for ttyS0 and tts/0 logins
/etc/securetty
I had to modify /etc/inittab
Code: | #SERIAL CONSOLE
s0:12345:respawn:/sbin/agetty -nl /bin/bashlogin 115200 ttyS0 vt100 |
22. umount /media/disk
23. Change BIOS to boot to USB HDD
24. Reboot
25. Done .. if all goes well you should have booted into the liveUSB
Really hope that helps at least one other person .. and if I made a mistake re-typing this I apologize in advance as I wrote this from pure memory
Thanks and enjoy _________________ success is the ability to go from one failure to the next without any loss of enthusiasm |
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pilla Bodhisattva
Joined: 07 Aug 2002 Posts: 7729 Location: Underworld
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Posted: Wed May 13, 2009 2:42 pm Post subject: |
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Moved from Other Things Gentoo to Documentation, Tips & Tricks. _________________ "I'm just very selective about the reality I choose to accept." -- Calvin |
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pilla Bodhisattva
Joined: 07 Aug 2002 Posts: 7729 Location: Underworld
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Posted: Wed May 13, 2009 2:44 pm Post subject: |
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Moved from Other Things Gentoo to Documentation, Tips & Tricks. _________________ "I'm just very selective about the reality I choose to accept." -- Calvin |
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BlackLodge Tux's lil' helper
Joined: 16 May 2004 Posts: 149 Location: TLS
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Posted: Tue May 08, 2012 2:17 pm Post subject: |
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Hi,
I tried this method for building an USB bootable stick to run in a headless machine, but I'm stuck in the part where the grub is intalled to the MBR of the stick.
Are these lines still working?
Quote: |
18. From the home Gentoo system copy over the boot folder into /media/disk (aka usb) directory -- special thanks to DONAHUE from Goose Creek SC for step 16
Code: |
user@laptop:$ cp -rf /boot .
echo "usbstick" > /media/disk/boot/grub/usbstick
ls -l /media/disk # verify boot folder copied
ls -l /media/disk/boot # verify the boot folder contents
ls -l /media/disk/boot/grub # verify the /boot/grub contents
grub
find /boot/usbstick
# return should be formatted like (hdx,y)
root (hdx,y) # substitute the returned digits for x,y
setup (hdx) # substitute the returned digits for x
quit
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If the bootable kernel is /media/disk/isolinux/gentoo , I don't get how is this location passed to grub _________________ Installing gentoo in a Vortex86DX
Kernel: https://forums.gentoo.org/viewtopic-t-1133787.html
CFLAGS, CHOST: https://forums.gentoo.org/viewtopic-t-1130400.html |
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