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Wow, first time I've messed with grub 2, and I had like 6 kernels still
hanging around and the result was just plain ugly! Is there any reason
we are recommending that the user edit grub.cfg manually instead of
using the /etc/grub.d directory as intended?
The grub config files are simply shell scripts, and stdout gets put into
the output file of grub-mkconfig (you can redirect to stderr in order to
print a nice message to the screen as in the example below). I'd much
rather get rid of /etc/grub.d/10_linux (by making it not executable) and
let the users define what is needed as opposed to searching for kernels
to make the file.
Example:
==============================================================
cat > /etc/grub.d/11_LFS-6.7 << "EONF" &&
#! /bin/sh -e
echo "Adding LFS-6.7" >&2
cat << EOF
menuentry "LFS-6.7" {
echo Starting LFS-6.7...
linux /vmlinux-2.6.35.2 root=/dev/sda6 ro
}
menuentry "LFS-6.7 (recovery)" {
echo Starting LFS-6.7 in recovery mode...
linux /vmlinux-2.6.35.2 root=/dev/sda6 ro single
}
EOF
EONF
cat > /etc/grub.d/12-LFS-6.6 << "EONF" &&
#! /bin/sh -e
echo "Adding LFS-6.6" >&2
cat << EOF
menuentry "LFS-6.6" {
echo Starting LFS-6.6...
linux /vmlinux-2.6.32.15 root=/dev/sda5 ro
}
menuentry "LFS-6.6 (recovery)" {
echo Starting LFS-6.6 in recovery mode...
linux /vmlinux-2.6.32.15 root=/dev/sda5 ro single
}
EOF
EONF
cat > /etc/grub.d/13_Windows << "EONF" &&
#! /bin/sh -e
echo "Adding Windows" >&2
cat << EOF
menuentry "Windows" {
set root=(hd0,1)
chainloder +1
}
EOF
EONF
chmod 755 /etc/grub.d/11_LFS-6.7 &&
chmod 755 /etc/grub.d/12_LFS-6.6 &&
chmod 755 /etc/grub.d/13_Windows &&
chmod 644 /etc/grub.d/10_linux &&
grub-mkconfig -o /boot/grub/grub.cfg
===============================================================
The first example give a little more info to the user as to what is
going on, but the alternate is to use 40_custom like so (untested):
===============================================================
cat >> /etc/grub.d/40_custom << "EOF" &&
menuentry "LFS-6.7" {
echo Starting LFS-6.7...
linux /vmlinux-2.6.35.2 root=/dev/sda6 ro
}
menuentry "LFS-6.7 (recovery)" {
echo Starting LFS-6.7 in recovery mode...
linux /vmlinux-2.6.35.2 root=/dev/sda6 ro single
}
menuentry "Windows" {
set root=(hd0,1)
chainloder +1
}
EOF
chmod 644 /etc/grub.d/10_linux &&
grub-mkconfig -o /boot/grub/grub.cfg
===============================================================
Additionally, we can comment out the search line in 00_header (since it
is pretty much useless on default build) and add some additions there
(like background image, or prettier colors, etc.). Also, I don't know
what 30_os-prober does, but thus far, it has been empty.
- -- DJ Lucas
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