amingholami · August 3, 2025 09:39 · aungthawdar · Jun 14, 2021 · arkashiks · Oct 11, 2021
diff --git a/make-chr.sh b/make-chr.sh
 wget http://download2.mikrotik.com/routeros/6.40.5/chr-6.40.5.img.zip -O chr.img.zip  && \
 gunzip -c chr.img.zip > chr.img  && \
 apt-get update && \
 apt install -y qemu-utils pv partx && \
 qemu-img convert chr.img -O qcow2 chr.qcow2 && \
 qemu-img resize chr.qcow2 `fdisk /dev/vda -l | head -n 1 | cut -d',' -f 2 | cut -d' ' -f 2` && \
 modprobe nbd && \
 qemu-nbd -c /dev/nbd0 chr.qcow2 && \
 echo "Give some time for qemu-nbd to be ready" && \
 sleep 2 && \
 partx -a /dev/nbd0 && \
 mount /dev/nbd0p2 /mnt && \
 ADDRESS=`ip addr show eth0 | grep global | cut -d' ' -f 6 | head -n 1` && \
 GATEWAY=`ip route list | grep default | cut -d' ' -f 3` && \
 echo "/ip address add address=$ADDRESS interface=[/interface ethernet find where name=ether1]
 /ip route add gateway=$GATEWAY
 /ip service disable telnet
 /user set 0 name=root password=xxxxxx
 " > /mnt/rw/autorun.scr && \
 umount /mnt && \
 echo "Magic constant is 65537 (second partition address). You can check it with fdisk before appliyng this" && \
 echo "This scary sequence removes seconds partition on nbd0 and creates new, but bigger one" && \
 echo -e 'd\n2\nn\np\n2\n65537\n\nw\n' | fdisk /dev/nbd0 && \
 e2fsck -f -y /dev/nbd0p2 || true && \
 resize2fs /dev/nbd0p2 && \
 sleep 1 && \
 echo "Compressing to gzip, this can take several minutes" && \
 mount -t tmpfs tmpfs /mnt && \
 pv /dev/nbd0 | gzip > /mnt/chr-extended.gz && \
 sleep 1 && \
 killall qemu-nbd && \
 sleep 1 && \
 echo u > /proc/sysrq-trigger && \
 echo "Warming up sleep" && \
 sleep 1 && \
 echo "Writing raw image, this will take time" && \
 zcat /mnt/chr-extended.gz | pv > /dev/vda && \
 echo "Sleep 5 seconds (if lucky)" && \
 sleep 5 || true && \
 echo "sync disk" && \
 echo s > /proc/sysrq-trigger && \
 echo "Ok, reboot" && \
 echo b > /proc/sysrq-trigger
	wget http://download2.mikrotik.com/routeros/6.40.5/chr-6.40.5.img.zip -O chr.img.zip && \
	gunzip -c chr.img.zip > chr.img && \
	apt-get update && \
	apt install -y qemu-utils pv partx && \
	qemu-img convert chr.img -O qcow2 chr.qcow2 && \
	qemu-img resize chr.qcow2 `fdisk /dev/vda -l \| head -n 1 \| cut -d',' -f 2 \| cut -d' ' -f 2` && \
	modprobe nbd && \
	qemu-nbd -c /dev/nbd0 chr.qcow2 && \
	echo "Give some time for qemu-nbd to be ready" && \
	sleep 2 && \
	partx -a /dev/nbd0 && \
	mount /dev/nbd0p2 /mnt && \
	ADDRESS=`ip addr show eth0 \| grep global \| cut -d' ' -f 6 \| head -n 1` && \
	GATEWAY=`ip route list \| grep default \| cut -d' ' -f 3` && \
	echo "/ip address add address=$ADDRESS interface=[/interface ethernet find where name=ether1]
	/ip route add gateway=$GATEWAY
	/ip service disable telnet
	/user set 0 name=root password=xxxxxx
	" > /mnt/rw/autorun.scr && \
	umount /mnt && \
	echo "Magic constant is 65537 (second partition address). You can check it with fdisk before appliyng this" && \
	echo "This scary sequence removes seconds partition on nbd0 and creates new, but bigger one" && \
	echo -e 'd\n2\nn\np\n2\n65537\n\nw\n' \| fdisk /dev/nbd0 && \
	e2fsck -f -y /dev/nbd0p2 \|\| true && \
	resize2fs /dev/nbd0p2 && \
	sleep 1 && \
	echo "Compressing to gzip, this can take several minutes" && \
	mount -t tmpfs tmpfs /mnt && \
	pv /dev/nbd0 \| gzip > /mnt/chr-extended.gz && \
	sleep 1 && \
	killall qemu-nbd && \
	sleep 1 && \
	echo u > /proc/sysrq-trigger && \
	echo "Warming up sleep" && \
	sleep 1 && \
	echo "Writing raw image, this will take time" && \
	zcat /mnt/chr-extended.gz \| pv > /dev/vda && \
	echo "Sleep 5 seconds (if lucky)" && \
	sleep 5 \|\| true && \
	echo "sync disk" && \
	echo s > /proc/sysrq-trigger && \
	echo "Ok, reboot" && \
	echo b > /proc/sysrq-trigger
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