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| Using Fedora General support for current versions. Ask questions about Fedora and it's software that do not belong in any other forum. |
10th June 2012, 04:21 AM
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Registered User
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Join Date: Sep 2006
Posts: 988
 
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Understanding the boot options
Hi,
I have fedora 16 32+ bit installed, which occupies the whole hard drive. Whenever I boot my pc I see these following 4 boot options (as part of the boot menu I guess). But I can only boot to the second option below. What are these options? Are they kernel versions?
Fedora 3.3.7-1.fc16.i686.PAE
Fedora 3.3.2-6.fc16.i686.PAE
Fedora 3.3.0-4.fc16.i686.PAE
Fedora 3.2.10-3.fc16.i686.PAE
Code:
[james@localhost ~]$ uname -a
Linux localhost.localdomain 3.3.2-6.fc16.i686.PAE #1 SMP Sat Apr 21 13:02:14 UTC 2012 i686 i686 i386 GNU/Linux
[james@localhost ~]$ uname -o
GNU/Linux
[james@localhost ~]$ uname -p
i686
[james@localhost ~]$ uname -s
Linux
[james@localhost ~]$ uname -m
i686
[james@localhost ~]$ uname -n
localhost.localdomain
[james@localhost ~]$ uname -r
3.3.2-6.fc16.i686.PAE
How do I change the boot timer, which happens to give me only 5 seconds to choose one of the above 4 options to boot from.
Thanks a lot.
Last edited by tech291083; 10th June 2012 at 04:33 AM.
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10th June 2012, 04:38 AM
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Formerly known as"professorrmd"
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Join Date: Mar 2011
Posts: 2,627
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Re: Understanding the boot options
Yes they are the different kernel versions that are installed in your computer. Well, you can edit the timer in /etc/default/grub and then update the grub using grub2-mkconfig. If you want to check if they are really installed, try
Code:
yum install installed | grep kernel
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10th June 2012, 12:57 PM
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Registered User
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Join Date: Sep 2006
Posts: 988
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Re: Understanding the boot options
I just change the time in /etc/default/grub file, but when I reboot my pc, there is still the default time of 5 seconds. Thanks.
Code:
GRUB_TIMEOUT=60
GRUB_DISTRIBUTOR="Fedora"
GRUB_DEFAULT=saved
GRUB_CMDLINE_LINUX="rd.md=0 rd.dm=0 rd.lvm.lv=VolGroup/lv_swap KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.lvm.lv=VolGroup/lv_root rd.luks=0 LANG=en_US.UTF-8"
~
~
"/etc/default/grub" 4L, 229C
---------- Post added at 04:57 AM ---------- Previous post was at 04:53 AM ----------
Code:
[root@localhost james]# grub2-mkconfig
Generating grub.cfg ...
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub2-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
load_env
fi
set default="${saved_entry}"
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function load_video {
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
}
set timeout=60
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/10_linux ###
Found linux image: /boot/vmlinuz-3.3.7-1.fc16.i686.PAE
menuentry 'Fedora Linux, with Linux 3.3.7-1.fc16.i686.PAE' --class fedora --class gnu-linux --class gnu --class os {
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set root='(hd0,gpt2)'
search --no-floppy --fs-uuid --set=root 99e1a371-84fb-4962-b3f1-6d686afc9a68
echo 'Loading Linux 3.3.7-1.fc16.i686.PAE ...'
linux /vmlinuz-3.3.7-1.fc16.i686.PAE root=/dev/mapper/VolGroup-lv_root ro rd.md=0 rd.dm=0 rd.lvm.lv=VolGroup/lv_swap KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.lvm.lv=VolGroup/lv_root rd.luks=0 LANG=en_US.UTF-8
}
menuentry 'Fedora Linux, with Linux 3.3.7-1.fc16.i686.PAE (recovery mode)' --class fedora --class gnu-linux --class gnu --class os {
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set root='(hd0,gpt2)'
search --no-floppy --fs-uuid --set=root 99e1a371-84fb-4962-b3f1-6d686afc9a68
echo 'Loading Linux 3.3.7-1.fc16.i686.PAE ...'
linux /vmlinuz-3.3.7-1.fc16.i686.PAE root=/dev/mapper/VolGroup-lv_root ro single rd.md=0 rd.dm=0 rd.lvm.lv=VolGroup/lv_swap KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.lvm.lv=VolGroup/lv_root rd.luks=0 LANG=en_US.UTF-8
}
Found linux image: /boot/vmlinuz-3.3.2-6.fc16.i686.PAE
Found initrd image: /boot/initramfs-3.3.2-6.fc16.i686.PAE.img
menuentry 'Fedora Linux, with Linux 3.3.2-6.fc16.i686.PAE' --class fedora --class gnu-linux --class gnu --class os {
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set root='(hd0,gpt2)'
search --no-floppy --fs-uuid --set=root 99e1a371-84fb-4962-b3f1-6d686afc9a68
echo 'Loading Linux 3.3.2-6.fc16.i686.PAE ...'
linux /vmlinuz-3.3.2-6.fc16.i686.PAE root=/dev/mapper/VolGroup-lv_root ro rd.md=0 rd.dm=0 rd.lvm.lv=VolGroup/lv_swap KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.lvm.lv=VolGroup/lv_root rd.luks=0 LANG=en_US.UTF-8
echo 'Loading initial ramdisk ...'
initrd /initramfs-3.3.2-6.fc16.i686.PAE.img
}
menuentry 'Fedora Linux, with Linux 3.3.2-6.fc16.i686.PAE (recovery mode)' --class fedora --class gnu-linux --class gnu --class os {
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set root='(hd0,gpt2)'
search --no-floppy --fs-uuid --set=root 99e1a371-84fb-4962-b3f1-6d686afc9a68
echo 'Loading Linux 3.3.2-6.fc16.i686.PAE ...'
linux /vmlinuz-3.3.2-6.fc16.i686.PAE root=/dev/mapper/VolGroup-lv_root ro single rd.md=0 rd.dm=0 rd.lvm.lv=VolGroup/lv_swap KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.lvm.lv=VolGroup/lv_root rd.luks=0 LANG=en_US.UTF-8
echo 'Loading initial ramdisk ...'
initrd /initramfs-3.3.2-6.fc16.i686.PAE.img
}
Found linux image: /boot/vmlinuz-3.3.0-4.fc16.i686.PAE
Found initrd image: /boot/initramfs-3.3.0-4.fc16.i686.PAE.img
menuentry 'Fedora Linux, with Linux 3.3.0-4.fc16.i686.PAE' --class fedora --class gnu-linux --class gnu --class os {
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set root='(hd0,gpt2)'
search --no-floppy --fs-uuid --set=root 99e1a371-84fb-4962-b3f1-6d686afc9a68
echo 'Loading Linux 3.3.0-4.fc16.i686.PAE ...'
linux /vmlinuz-3.3.0-4.fc16.i686.PAE root=/dev/mapper/VolGroup-lv_root ro rd.md=0 rd.dm=0 rd.lvm.lv=VolGroup/lv_swap KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.lvm.lv=VolGroup/lv_root rd.luks=0 LANG=en_US.UTF-8
echo 'Loading initial ramdisk ...'
initrd /initramfs-3.3.0-4.fc16.i686.PAE.img
}
menuentry 'Fedora Linux, with Linux 3.3.0-4.fc16.i686.PAE (recovery mode)' --class fedora --class gnu-linux --class gnu --class os {
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set root='(hd0,gpt2)'
search --no-floppy --fs-uuid --set=root 99e1a371-84fb-4962-b3f1-6d686afc9a68
echo 'Loading Linux 3.3.0-4.fc16.i686.PAE ...'
linux /vmlinuz-3.3.0-4.fc16.i686.PAE root=/dev/mapper/VolGroup-lv_root ro single rd.md=0 rd.dm=0 rd.lvm.lv=VolGroup/lv_swap KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.lvm.lv=VolGroup/lv_root rd.luks=0 LANG=en_US.UTF-8
echo 'Loading initial ramdisk ...'
initrd /initramfs-3.3.0-4.fc16.i686.PAE.img
}
Found linux image: /boot/vmlinuz-3.2.10-3.fc16.i686.PAE
Found initrd image: /boot/initramfs-3.2.10-3.fc16.i686.PAE.img
menuentry 'Fedora Linux, with Linux 3.2.10-3.fc16.i686.PAE' --class fedora --class gnu-linux --class gnu --class os {
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set root='(hd0,gpt2)'
search --no-floppy --fs-uuid --set=root 99e1a371-84fb-4962-b3f1-6d686afc9a68
echo 'Loading Linux 3.2.10-3.fc16.i686.PAE ...'
linux /vmlinuz-3.2.10-3.fc16.i686.PAE root=/dev/mapper/VolGroup-lv_root ro rd.md=0 rd.dm=0 rd.lvm.lv=VolGroup/lv_swap KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.lvm.lv=VolGroup/lv_root rd.luks=0 LANG=en_US.UTF-8
echo 'Loading initial ramdisk ...'
initrd /initramfs-3.2.10-3.fc16.i686.PAE.img
}
menuentry 'Fedora Linux, with Linux 3.2.10-3.fc16.i686.PAE (recovery mode)' --class fedora --class gnu-linux --class gnu --class os {
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set root='(hd0,gpt2)'
search --no-floppy --fs-uuid --set=root 99e1a371-84fb-4962-b3f1-6d686afc9a68
echo 'Loading Linux 3.2.10-3.fc16.i686.PAE ...'
linux /vmlinuz-3.2.10-3.fc16.i686.PAE root=/dev/mapper/VolGroup-lv_root ro single rd.md=0 rd.dm=0 rd.lvm.lv=VolGroup/lv_swap KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.lvm.lv=VolGroup/lv_root rd.luks=0 LANG=en_US.UTF-8
echo 'Loading initial ramdisk ...'
initrd /initramfs-3.2.10-3.fc16.i686.PAE.img
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
### BEGIN /etc/grub.d/90_persistent ###
### END /etc/grub.d/90_persistent ###
done
[root@localhost james]#
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10th June 2012, 03:17 PM
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Registered User
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Join Date: Aug 2004
Posts: 3,855
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Re: Understanding the boot options
Did you run grub2-mkconfig after editing /etc/default/grub?
http://forums.fedoraforum.org/showthread.php?t=262670
__________________
"Never let the task you are trying to accomplish distract you from the study of computers."
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10th June 2012, 03:33 PM
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Registered User
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Join Date: Mar 2012
Location: Mumbai
Posts: 36
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Re: Understanding the boot options
timeout of 60 seconds!!!!!!!!!!!!!!!!
dont u think its too much time???
btw whats the maximum time out applicable? or there is no such limit???
---------- Post added at 08:03 PM ---------- Previous post was at 08:03 PM ----------
timeout of 60 seconds!!!!!!!!!!!!!!!!
dont u think its too much time???
btw whats the maximum time out applicable? or there is no such limit???
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10th June 2012, 05:43 PM
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Registered User
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Join Date: Sep 2006
Posts: 988
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Re: Understanding the boot options
Quote:
Totally wrong advice. There is no "grub2.conf" file, for you, or anyone else. If you edit the "/boot/grub2/grub.cfg file directly, then do "grub2-mkconfig -o /boot/grub2/grub.cfg", whatever setting is in /etc/default/grub will overwrite your edit in /boot/grub2/grub.cfg.
You make your grub configuration changes in /etc/default/grub, then use "grub2-mkconfig -o /boot/grub2/grub.cfg" to make those changes appear in the /boot/grub2/grub.cfg file.
If you want to make direct edits to /boot/grub2/grub.cfg, then refrain from ever using the grub2-mkconfig command again.
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http://forums.fedoraforum.org/showthread.php?t=275870
---------- Post added at 09:43 AM ---------- Previous post was at 09:39 AM ----------
First of all I made the changes in /etc/default/grub and then I did the following command in a terminal as root.
Code:
grub2-mkconfig -o /boot/grub2/grub.cfg
I did not touch the /boot/grub2/grub.cfg file at all.
And now it works. Yes, 60 seconds is a bit more, but that suits me. Thanks a lot for your replies.
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