Core OS Index

1.4. Prepare for Reboot

Follow this instructions with active chroot, first mount partitions and before chroot mount follow file systems;

        $ sudo mount --bind /dev $CHROOT/dev
        $ sudo mount -vt devpts devpts $CHROOT/dev/pts
        $ sudo mount -vt tmpfs shm $CHROOT/dev/shm
        $ sudo mount -vt proc proc $CHROOT/proc
        $ sudo mount -vt sysfs sysfs $CHROOT/sys

Now you can chroot;

        $ sudo chroot $CHROOT /usr/bin/env -i \
          HOME=/root TERM="$TERM" PS1='\u:\w\$ ' \
          PATH=/bin:/usr/bin:/sbin:/usr/sbin \
          /bin/bash --login

1.4.1. Linux Kernel

Install kernel with default crux configuration using pkgutils;

        # cd /usr/ports/c9-ports/linux-crux
        # pkgmk -d
        # pkgadd /usr/ports/packages/linux-crux#4.1.30-1.pkg.tar.gz

1.4.2. Dracut - Initramfs

Install dracut;

        # cd /usr/ports/c9-ports/dracut
        # pkgmk -d
        # pkgadd /usr/ports/packages/dracut#044-2.pkg.tar.gz

Run dracut to create init ram filesystem;

        # dracut -v -H --fstab  /boot/initramfs-4.1.30-crux.img 4.1.30-crux

1.4.3. Configuring Grub2

Create grub file in /etc/default/grub with values;

        GRUB_DISABLE_LINUX_UUID=false
        GRUB_ENABLE_LINUX_LABEL=false

Grub Manual, install grub on MBR of disk sdb;

        # grub-install /dev/sdb
        Installation finished. No error reported.

If you are installing on removable media;

        # grub-install --removable /dev/sdb
        Installation finished. No error reported.

grub-mkconfig generates grub.cfg, it will try to discover available kernels and attempt to generate menu entries for them;

        # grub-mkconfig -o /boot/grub/grub.cfg
        Generating grub.cfg ...
        Found linux image: /boot/vmlinuz-4.1.30-crux
        Found initrd image: /boot/initramfs-4.1.30-crux.img
        done
        #

Check /boot/grub/grub.cfg, if is wrong add menu to /etc/grub.d/40_custom, replace correct msdos partition from grub-prob output and correct UUID from fstab or blkid

        # grub-probe --target=hints_string /

1.4.4. Checkup

If you have qemu installed you can see if it boots, in this example sdb is usb external drive;

        # qemu-system-x86_64 -curses -usb -usbdevice disk:/dev/sdb

        # qemu-system-x86_64 -kernel /boot/vmlinuz-linux -initrd /boot/initramfs-linux.img -append root=/dev/sdb /dev/sdb2

	# qemu-img convert crux-img.qcow2 -O raw crux.img
	# dd if=crux.img of=/dev/sdX

Core OS Index