How to make grub-mkconfig work on a usb device?

up vote
2
down vote

favorite

AFAIK grub-mkconfig and grub-update/update-grub commands only run on the device that they are installed on.

I want to run the commands on a usb drive, but

I don't know how to install them on the usb

I can't make the ones that are installed on my computer to run on usb(i.e they should update the usb's grub.cfg file)

How can I do either of them?

BTW I am using manjaro KDE

asked Sep 8 '15 at 13:19

Registered User

1662722

What is it exactly what you are trying to acomplish?
– YoMismo
Sep 8 '15 at 13:44

@YoMismo unix.stackexchange.com/q/224695/55673
– Registered User
Sep 8 '15 at 14:02

Then mount your usb in /mnt, mount --bind /dev /sys /proc under mnt's respctive ones and chroot to your /mnt, modify any needed file and run grub-mkconfig
– YoMismo
Sep 8 '15 at 14:11

@YoMismo Can you write an answer? I didn't get your comment properly.
– Registered User
Sep 8 '15 at 14:33

add a comment |

up vote
2
down vote

favorite

AFAIK grub-mkconfig and grub-update/update-grub commands only run on the device that they are installed on.

I want to run the commands on a usb drive, but

I don't know how to install them on the usb

I can't make the ones that are installed on my computer to run on usb(i.e they should update the usb's grub.cfg file)

How can I do either of them?

BTW I am using manjaro KDE

asked Sep 8 '15 at 13:19

Registered User

1662722

What is it exactly what you are trying to acomplish?
– YoMismo
Sep 8 '15 at 13:44

@YoMismo unix.stackexchange.com/q/224695/55673
– Registered User
Sep 8 '15 at 14:02

Then mount your usb in /mnt, mount --bind /dev /sys /proc under mnt's respctive ones and chroot to your /mnt, modify any needed file and run grub-mkconfig
– YoMismo
Sep 8 '15 at 14:11

@YoMismo Can you write an answer? I didn't get your comment properly.
– Registered User
Sep 8 '15 at 14:33

add a comment |

up vote
2
down vote

favorite

AFAIK grub-mkconfig and grub-update/update-grub commands only run on the device that they are installed on.

I want to run the commands on a usb drive, but

I don't know how to install them on the usb

I can't make the ones that are installed on my computer to run on usb(i.e they should update the usb's grub.cfg file)

How can I do either of them?

BTW I am using manjaro KDE

asked Sep 8 '15 at 13:19

Registered User

1662722

AFAIK grub-mkconfig and grub-update/update-grub commands only run on the device that they are installed on.

I want to run the commands on a usb drive, but

I don't know how to install them on the usb

I can't make the ones that are installed on my computer to run on usb(i.e they should update the usb's grub.cfg file)

How can I do either of them?

BTW I am using manjaro KDE

grub2 live-usb

asked Sep 8 '15 at 13:19

Registered User

1662722

asked Sep 8 '15 at 13:19

Registered User

1662722

asked Sep 8 '15 at 13:19

Registered User

1662722

asked Sep 8 '15 at 13:19

Registered User

1662722

asked Sep 8 '15 at 13:19

Registered User

1662722

What is it exactly what you are trying to acomplish?
– YoMismo
Sep 8 '15 at 13:44

@YoMismo unix.stackexchange.com/q/224695/55673
– Registered User
Sep 8 '15 at 14:02

Then mount your usb in /mnt, mount --bind /dev /sys /proc under mnt's respctive ones and chroot to your /mnt, modify any needed file and run grub-mkconfig
– YoMismo
Sep 8 '15 at 14:11

@YoMismo Can you write an answer? I didn't get your comment properly.
– Registered User
Sep 8 '15 at 14:33

add a comment |

What is it exactly what you are trying to acomplish?
– YoMismo
Sep 8 '15 at 13:44

@YoMismo unix.stackexchange.com/q/224695/55673
– Registered User
Sep 8 '15 at 14:02

Then mount your usb in /mnt, mount --bind /dev /sys /proc under mnt's respctive ones and chroot to your /mnt, modify any needed file and run grub-mkconfig
– YoMismo
Sep 8 '15 at 14:11

@YoMismo Can you write an answer? I didn't get your comment properly.
– Registered User
Sep 8 '15 at 14:33

What is it exactly what you are trying to acomplish?
– YoMismo
Sep 8 '15 at 13:44

@YoMismo unix.stackexchange.com/q/224695/55673
– Registered User
Sep 8 '15 at 14:02

Then mount your usb in /mnt, mount --bind /dev /sys /proc under mnt's respctive ones and chroot to your /mnt, modify any needed file and run grub-mkconfig
– YoMismo
Sep 8 '15 at 14:11

@YoMismo Can you write an answer? I didn't get your comment properly.
– Registered User
Sep 8 '15 at 14:33

add a comment |

1 Answer
1

active

oldest

votes

up vote
0
down vote

Mount your USB in /mnt: mount /dev/your_USB /mnt

mount --bind /dev /mnt/dev

mount --bind /proc /mnt/proc

mount --bind /sys /mnt/sys

chroot /mnt

Modify GRUB config files.

grub-mkconfig

edited Jan 29 at 12:16

answered Sep 8 '15 at 14:57

YoMismo

3,0561724

Beware - I find that it puts incorrect 'search hints' in the grub.cfg that can stop the target machine from finding kernel and initrd. You may need to clean it up (sed helps).
– Toby Speight
Sep 8 '15 at 16:33

I get this error chroot: failed to run command ‘/bin/bash’: No such file or directory
– Registered User
Sep 8 '15 at 16:50

Try chroot /mnt /path/to/your/shell
– YoMismo
Sep 9 '15 at 7:39

@YoMismo I tried sudo chroot /mnt /usr/bin/bash it gives chroot: failed to run command ‘/usr/bin/bash’: No such file or directory
– Registered User
Sep 19 '15 at 9:46

Does /usr/bin/bash exist?
– YoMismo
Sep 19 '15 at 21:21

|
show 2 more comments

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

up vote
0
down vote

Mount your USB in /mnt: mount /dev/your_USB /mnt

mount --bind /dev /mnt/dev

mount --bind /proc /mnt/proc

mount --bind /sys /mnt/sys

chroot /mnt

Modify GRUB config files.

grub-mkconfig

edited Jan 29 at 12:16

answered Sep 8 '15 at 14:57

YoMismo

3,0561724

Beware - I find that it puts incorrect 'search hints' in the grub.cfg that can stop the target machine from finding kernel and initrd. You may need to clean it up (sed helps).
– Toby Speight
Sep 8 '15 at 16:33

I get this error chroot: failed to run command ‘/bin/bash’: No such file or directory
– Registered User
Sep 8 '15 at 16:50

Try chroot /mnt /path/to/your/shell
– YoMismo
Sep 9 '15 at 7:39

@YoMismo I tried sudo chroot /mnt /usr/bin/bash it gives chroot: failed to run command ‘/usr/bin/bash’: No such file or directory
– Registered User
Sep 19 '15 at 9:46

Does /usr/bin/bash exist?
– YoMismo
Sep 19 '15 at 21:21

|
show 2 more comments

up vote
0
down vote

Mount your USB in /mnt: mount /dev/your_USB /mnt

mount --bind /dev /mnt/dev

mount --bind /proc /mnt/proc

mount --bind /sys /mnt/sys

chroot /mnt

Modify GRUB config files.

grub-mkconfig

edited Jan 29 at 12:16

answered Sep 8 '15 at 14:57

YoMismo

3,0561724

Beware - I find that it puts incorrect 'search hints' in the grub.cfg that can stop the target machine from finding kernel and initrd. You may need to clean it up (sed helps).
– Toby Speight
Sep 8 '15 at 16:33

I get this error chroot: failed to run command ‘/bin/bash’: No such file or directory
– Registered User
Sep 8 '15 at 16:50

Try chroot /mnt /path/to/your/shell
– YoMismo
Sep 9 '15 at 7:39

@YoMismo I tried sudo chroot /mnt /usr/bin/bash it gives chroot: failed to run command ‘/usr/bin/bash’: No such file or directory
– Registered User
Sep 19 '15 at 9:46

Does /usr/bin/bash exist?
– YoMismo
Sep 19 '15 at 21:21

|
show 2 more comments

up vote
0
down vote

Mount your USB in /mnt: mount /dev/your_USB /mnt

mount --bind /dev /mnt/dev

mount --bind /proc /mnt/proc

mount --bind /sys /mnt/sys

chroot /mnt

Modify GRUB config files.

grub-mkconfig

edited Jan 29 at 12:16

answered Sep 8 '15 at 14:57

YoMismo

3,0561724

Mount your USB in /mnt: mount /dev/your_USB /mnt

mount --bind /dev /mnt/dev

mount --bind /proc /mnt/proc

mount --bind /sys /mnt/sys

chroot /mnt

Modify GRUB config files.

grub-mkconfig

edited Jan 29 at 12:16

answered Sep 8 '15 at 14:57

YoMismo

3,0561724

edited Jan 29 at 12:16

answered Sep 8 '15 at 14:57

YoMismo

3,0561724

answered Sep 8 '15 at 14:57

YoMismo

3,0561724

answered Sep 8 '15 at 14:57

YoMismo

3,0561724

Beware - I find that it puts incorrect 'search hints' in the grub.cfg that can stop the target machine from finding kernel and initrd. You may need to clean it up (sed helps).
– Toby Speight
Sep 8 '15 at 16:33

I get this error chroot: failed to run command ‘/bin/bash’: No such file or directory
– Registered User
Sep 8 '15 at 16:50

Try chroot /mnt /path/to/your/shell
– YoMismo
Sep 9 '15 at 7:39

@YoMismo I tried sudo chroot /mnt /usr/bin/bash it gives chroot: failed to run command ‘/usr/bin/bash’: No such file or directory
– Registered User
Sep 19 '15 at 9:46

Does /usr/bin/bash exist?
– YoMismo
Sep 19 '15 at 21:21

|
show 2 more comments

Beware - I find that it puts incorrect 'search hints' in the grub.cfg that can stop the target machine from finding kernel and initrd. You may need to clean it up (sed helps).
– Toby Speight
Sep 8 '15 at 16:33

I get this error chroot: failed to run command ‘/bin/bash’: No such file or directory
– Registered User
Sep 8 '15 at 16:50

Try chroot /mnt /path/to/your/shell
– YoMismo
Sep 9 '15 at 7:39

@YoMismo I tried sudo chroot /mnt /usr/bin/bash it gives chroot: failed to run command ‘/usr/bin/bash’: No such file or directory
– Registered User
Sep 19 '15 at 9:46

Does /usr/bin/bash exist?
– YoMismo
Sep 19 '15 at 21:21

Beware - I find that it puts incorrect 'search hints' in the grub.cfg that can stop the target machine from finding kernel and initrd. You may need to clean it up (sed helps).
– Toby Speight
Sep 8 '15 at 16:33

I get this error chroot: failed to run command ‘/bin/bash’: No such file or directory
– Registered User
Sep 8 '15 at 16:50

Try chroot /mnt /path/to/your/shell
– YoMismo
Sep 9 '15 at 7:39

@YoMismo I tried sudo chroot /mnt /usr/bin/bash it gives chroot: failed to run command ‘/usr/bin/bash’: No such file or directory
– Registered User
Sep 19 '15 at 9:46

Does /usr/bin/bash exist?
– YoMismo
Sep 19 '15 at 21:21

|
show 2 more comments

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