Booting from CD in CentOS
I am trying to modify the grub boot manager in my CentOS machine so that it can boot from a CD-rom. The method I am most familiar with (and the method that all of my Google searches tell me to do) involve modifying the /etc/grub.d/40_custom file. Unfortunately, the folder /etc/grub.d doesn't seem to exist. Creating it and adding the file isn't helping, either. Does CentOS grub do something differently to other systems, or is this something that grub has changed recently? What should I be doing instead?
centos grub
asked Jul 13 '15 at 17:10
R_KappR_Kapp
1014
add a comment |
I am trying to modify the grub boot manager in my CentOS machine so that it can boot from a CD-rom. The method I am most familiar with (and the method that all of my Google searches tell me to do) involve modifying the /etc/grub.d/40_custom file. Unfortunately, the folder /etc/grub.d doesn't seem to exist. Creating it and adding the file isn't helping, either. Does CentOS grub do something differently to other systems, or is this something that grub has changed recently? What should I be doing instead?
centos grub
asked Jul 13 '15 at 17:10
R_KappR_Kapp
1014
@Christopher: The boot manager doesn't give me the option... It simply lists CentOS and no image, even though the image is bootable. I seegrub.conf, but I've always worked with the scripts ingrub.d(via e.g. a menuentry command), and can't seem to figure out the syntax used in thegrub.conffile.
– R_Kapp
Jul 13 '15 at 17:32
The linux operating system (CentOS) does not do the booting. It is your BIOS/EFI that does the booting, and it is there you tell it to boot from "DVD" or whichever disk. Grub happens after the hard drive is already "booted", or once the DVD/CD has "booted" and the GRUB program contained on the DVD is executed.
– ron
Feb 15 at 20:10
Once Grub (grand unified boot loader) is running, it will then load whatever operating system (CentOS, Windows, whatever) it was configured to do.
– ron
Feb 15 at 20:13
add a comment |
I am trying to modify the grub boot manager in my CentOS machine so that it can boot from a CD-rom. The method I am most familiar with (and the method that all of my Google searches tell me to do) involve modifying the /etc/grub.d/40_custom file. Unfortunately, the folder /etc/grub.d doesn't seem to exist. Creating it and adding the file isn't helping, either. Does CentOS grub do something differently to other systems, or is this something that grub has changed recently? What should I be doing instead?
centos grub
asked Jul 13 '15 at 17:10
R_KappR_Kapp
1014
I am trying to modify the grub boot manager in my CentOS machine so that it can boot from a CD-rom. The method I am most familiar with (and the method that all of my Google searches tell me to do) involve modifying the /etc/grub.d/40_custom file. Unfortunately, the folder /etc/grub.d doesn't seem to exist. Creating it and adding the file isn't helping, either. Does CentOS grub do something differently to other systems, or is this something that grub has changed recently? What should I be doing instead?
centos grub
centos grub
asked Jul 13 '15 at 17:10
R_KappR_Kapp
1014
asked Jul 13 '15 at 17:10
R_KappR_Kapp
1014
asked Jul 13 '15 at 17:10
R_KappR_Kapp
1014
asked Jul 13 '15 at 17:10
R_KappR_Kapp
1014
asked Jul 13 '15 at 17:10
R_KappR_Kapp
1014
1014
@Christopher: The boot manager doesn't give me the option... It simply lists CentOS and no image, even though the image is bootable. I seegrub.conf, but I've always worked with the scripts ingrub.d(via e.g. a menuentry command), and can't seem to figure out the syntax used in thegrub.conffile.
– R_Kapp
Jul 13 '15 at 17:32
The linux operating system (CentOS) does not do the booting. It is your BIOS/EFI that does the booting, and it is there you tell it to boot from "DVD" or whichever disk. Grub happens after the hard drive is already "booted", or once the DVD/CD has "booted" and the GRUB program contained on the DVD is executed.
– ron
Feb 15 at 20:10
Once Grub (grand unified boot loader) is running, it will then load whatever operating system (CentOS, Windows, whatever) it was configured to do.
– ron
Feb 15 at 20:13
add a comment |
@Christopher: The boot manager doesn't give me the option... It simply lists CentOS and no image, even though the image is bootable. I seegrub.conf, but I've always worked with the scripts ingrub.d(via e.g. a menuentry command), and can't seem to figure out the syntax used in thegrub.conffile.
– R_Kapp
Jul 13 '15 at 17:32
The linux operating system (CentOS) does not do the booting. It is your BIOS/EFI that does the booting, and it is there you tell it to boot from "DVD" or whichever disk. Grub happens after the hard drive is already "booted", or once the DVD/CD has "booted" and the GRUB program contained on the DVD is executed.
– ron
Feb 15 at 20:10
Once Grub (grand unified boot loader) is running, it will then load whatever operating system (CentOS, Windows, whatever) it was configured to do.
– ron
Feb 15 at 20:13
@Christopher: The boot manager doesn't give me the option... It simply lists CentOS and no image, even though the image is bootable. I see
grub.conf, but I've always worked with the scripts in grub.d (via e.g. a menuentry command), and can't seem to figure out the syntax used in the grub.conf file.– R_Kapp
Jul 13 '15 at 17:32
@Christopher: The boot manager doesn't give me the option... It simply lists CentOS and no image, even though the image is bootable. I see
grub.conf, but I've always worked with the scripts in grub.d (via e.g. a menuentry command), and can't seem to figure out the syntax used in the grub.conf file.– R_Kapp
Jul 13 '15 at 17:32
The linux operating system (CentOS) does not do the booting. It is your BIOS/EFI that does the booting, and it is there you tell it to boot from "DVD" or whichever disk. Grub happens after the hard drive is already "booted", or once the DVD/CD has "booted" and the GRUB program contained on the DVD is executed.
– ron
Feb 15 at 20:10
The linux operating system (CentOS) does not do the booting. It is your BIOS/EFI that does the booting, and it is there you tell it to boot from "DVD" or whichever disk. Grub happens after the hard drive is already "booted", or once the DVD/CD has "booted" and the GRUB program contained on the DVD is executed.
– ron
Feb 15 at 20:10
Once Grub (grand unified boot loader) is running, it will then load whatever operating system (CentOS, Windows, whatever) it was configured to do.
– ron
Feb 15 at 20:13
Once Grub (grand unified boot loader) is running, it will then load whatever operating system (CentOS, Windows, whatever) it was configured to do.
– ron
Feb 15 at 20:13
add a comment |
1 Answer
1
active
oldest
votes
Try find.. "find / -name grub"
/boot/grub perhaps is what you are looking for.
answered Jul 13 '15 at 17:26
Philip WibergPhilip Wiberg
8115
I've found/boot/grub, but I'm not sure what to do exactly when I get there. I seegrub.conflists the entries to the boot manager, presumably adding in my iso file there will help, but I have no idea what the syntax should be.
– R_Kapp
Jul 13 '15 at 17:28
add a comment |
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1 Answer
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1 Answer
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active
oldest
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oldest
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active
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votes
Try find.. "find / -name grub"
/boot/grub perhaps is what you are looking for.
answered Jul 13 '15 at 17:26
Philip WibergPhilip Wiberg
8115
I've found/boot/grub, but I'm not sure what to do exactly when I get there. I seegrub.conflists the entries to the boot manager, presumably adding in my iso file there will help, but I have no idea what the syntax should be.
– R_Kapp
Jul 13 '15 at 17:28
add a comment |
Try find.. "find / -name grub"
/boot/grub perhaps is what you are looking for.
answered Jul 13 '15 at 17:26
Philip WibergPhilip Wiberg
8115
I've found/boot/grub, but I'm not sure what to do exactly when I get there. I seegrub.conflists the entries to the boot manager, presumably adding in my iso file there will help, but I have no idea what the syntax should be.
– R_Kapp
Jul 13 '15 at 17:28
add a comment |
Try find.. "find / -name grub"
/boot/grub perhaps is what you are looking for.
answered Jul 13 '15 at 17:26
Philip WibergPhilip Wiberg
8115
Try find.. "find / -name grub"
/boot/grub perhaps is what you are looking for.
answered Jul 13 '15 at 17:26
Philip WibergPhilip Wiberg
8115
answered Jul 13 '15 at 17:26
Philip WibergPhilip Wiberg
8115
answered Jul 13 '15 at 17:26
Philip WibergPhilip Wiberg
8115
answered Jul 13 '15 at 17:26
Philip WibergPhilip Wiberg
8115
8115
I've found/boot/grub, but I'm not sure what to do exactly when I get there. I seegrub.conflists the entries to the boot manager, presumably adding in my iso file there will help, but I have no idea what the syntax should be.
– R_Kapp
Jul 13 '15 at 17:28
add a comment |
I've found/boot/grub, but I'm not sure what to do exactly when I get there. I seegrub.conflists the entries to the boot manager, presumably adding in my iso file there will help, but I have no idea what the syntax should be.
– R_Kapp
Jul 13 '15 at 17:28
I've found
/boot/grub, but I'm not sure what to do exactly when I get there. I see grub.conf lists the entries to the boot manager, presumably adding in my iso file there will help, but I have no idea what the syntax should be.– R_Kapp
Jul 13 '15 at 17:28
I've found
/boot/grub, but I'm not sure what to do exactly when I get there. I see grub.conf lists the entries to the boot manager, presumably adding in my iso file there will help, but I have no idea what the syntax should be.– R_Kapp
Jul 13 '15 at 17:28
add a comment |
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@Christopher: The boot manager doesn't give me the option... It simply lists CentOS and no image, even though the image is bootable. I see
grub.conf, but I've always worked with the scripts ingrub.d(via e.g. a menuentry command), and can't seem to figure out the syntax used in thegrub.conffile.– R_Kapp
Jul 13 '15 at 17:32
The linux operating system (CentOS) does not do the booting. It is your BIOS/EFI that does the booting, and it is there you tell it to boot from "DVD" or whichever disk. Grub happens after the hard drive is already "booted", or once the DVD/CD has "booted" and the GRUB program contained on the DVD is executed.
– ron
Feb 15 at 20:10
Once Grub (grand unified boot loader) is running, it will then load whatever operating system (CentOS, Windows, whatever) it was configured to do.
– ron
Feb 15 at 20:13