Way too many SBCs! I have a nice selection of Onions.
Hello Mods,
I'm disturbed by the number of spam posts appearing recently. Like the majority of visitors here, i come for the technical discussions, not to read some scammy schemes cluttering up a valuable resource. It also detracts from the brand. So please sort it out!
Re: Omega Backup / Restore Instructions
I decided I needed to be able to backup my 4 (and counting!) Omega2 and Omega2+ devices, ideally to one place using the instructions in the aforementioned post.
I erased a spare USB stick under Linux and created 4 primary partitions, each the same size. I labelled each partition with the relevant 4 characters of the MAC address (shown obfuscated here).
On each Onion I then created the /mnt/backup directory before running /root/backup.sh as shown below.
#!/bin/sh
# backup.sh
# From: https://community.onion.io/topic/2677/omega-backup-restore-instructions
# My machines use /dev/sdb - YMMV !
# get the machine name
MACHINE=`/bin/uname -n`
# get today's date
TODAY=`date +%Y-%m-%d`
# which machine am I on?
if [ $MACHINE = Omega-0001 ]; then
mount /dev/sdb1 /mnt/backup
elif [ $MACHINE = Omega-0002 ]; then
mount /dev/sdb2 /mnt/backup
elif [ $MACHINE = Omega-0003 ]; then
mount /dev/sdb3 /mnt/backup
elif [ $MACHINE = Omega-0004 ]; then
mount /dev/sdb4 /mnt/backup
else
echo "machine $MACHINE unknown - exit"
exit
fi
echo "Backing up $MACHINE"
# final check, to be sure ...
if [ -d /mnt/backup ]; then
echo "backing up..."
else
echo "NO BACKUP DEVICE found - exit"
exit
fi
# standard MTDs
dd if=/dev/mtd0 of=/mnt/backup/uboot.bin
dd if=/dev/mtd1 of=/mnt/backup/ubootenv.bin
dd if=/dev/mtd2 of=/mnt/backup/factory.bin
dd if=/dev/mtd3 of=/mnt/backup/firmware.bin
dd if=/dev/mtd4 of=/mnt/backup/kernel.bin
dd if=/dev/mtd5 of=/mnt/backup/rootfs.bin
dd if=/dev/mtd6 of=/mnt/backup/rootfsdata.bin
# export UCI settings for good measure
uci export > /mnt/backup/UCIexport_$TODAY
echo "all done"
exit
Once the backup is complete on each machine you can then umount /mnt/backup and remove the USB stick.
So looking at the finished 4 backups on another Linux box, the USB stick is mounted on /dev/sdC, here's a typical directory listing:
ls -l /media/peter/0004-backup
total 41056
-rwxr-xr-x 1 peter peter 1086 Jul 10 13:41 backup.sh
-rw-r--r-- 1 root root 65536 Jul 10 13:38 factory.bin
-rw-r--r-- 1 root root 16449536 Jul 10 13:39 firmware.bin
-rw-r--r-- 1 root root 1341962 Jul 10 13:39 kernel.bin
drwx------ 2 root root 16384 Jul 10 13:08 lost+found
-rw-r--r-- 1 root root 15107574 Jul 10 13:39 rootfs.bin
-rw-r--r-- 1 root root 8781824 Jul 10 13:39 rootfsdata.bin
-rw-r--r-- 1 root root 196608 Jul 10 13:38 uboot.bin
-rw-r--r-- 1 root root 65536 Jul 10 13:38 ubootenv.bin
-rw-r--r-- 1 root root 6459 Jul 10 13:39 UCIexport_2019-07-10
... and free space:
df -h /dev/sdc*
Filesystem Size Used Avail Use% Mounted on
udev 3.9G 0 3.9G 0% /dev
/dev/sdc1 6.9G 120M 6.4G 2% /media/peter/0001-backup
/dev/sdc2 6.9G 120M 6.4G 2% /media/peter/0002-backup
/dev/sdc3 6.9G 72M 6.5G 2% /media/peter/0003-backup
/dev/sdc4 6.9G 72M 6.5G 2% /media/peter/0004-backup
As you can see, my USB stick is way too big and I'll see if I can find a smaller device instead.
@David-Kerr thanks - i'd considered the hardware option but I don't want to damage my board 
I will have a poke around the power-dock-2 script and see if i can figure something out from that.
Any takers? I'm keen to know as I did a battery test yesterday and achieved just over 12 hours with a 3000mAh LiPo battery. Initially the Omega was just idling, but then I set up a wget my homepage in a loop to give it some exercise. Very impressive.
If I can query it programatically I can then either shut it down gracefully or get the proxy to divert.
I'm running my Omega2 pro via a 5v USB feed at the moment, and there's a LiPo battery also plugged in for backup. If I disconnect the main power it switches over just fine but what I want to do is to be able to detect that this (and vice versa) when it returns.
Is there any way I can do this via software, preferably with Python(3) as I want to be able to raise a notification?
@crispyoz thanks i'll give that a try. I'm always a bit wary if removing system-sounding things 
Hi all,
I'm busy tuning my new Onion 2Pro (great machine!) and have come across a process called onion-helper. I'm trying to get rid of unnecessary process to make as lean a machine possible, so if I can disable this via /etc/init.d, I will. All I can figure out is that it respawns if terminated, but other than that, no idea. Can anyone advise please?
@crispyoz Man thanks for this! I get regular DDoS attacks on my other home-hosted servers, so there's no reason to expect my little Onion device to escape, unfortunately.
I'll check out Nginx when I get the 2Pro and I'll also try lighttpd as well as that seems to have a low resource requirement. The device will only be running the web server and SSH so I don't anticipate too many resource issues, but we'll see!
I'll post something here when it's up and running!
Hi all,
After a long break i've ordered an Omega 2Pro for my next project. I want to set up an Internet-facing low-traffic web server using the onboard uhttpd and add a LetsEncrypt cert to it to provide https. This has been inspired by an earlier project based on Piratebox - I ran a DLNA server on a 2+ and it uworked really well. Eventually the device may be solar-powered. From what I've read, i'll probably have to create certs manually on a different machine and copy the certs over.
So, based on your knowledge of these things, should i be using uhttpd in this way? I have extensive experience of lighttpd and nginx, but these would probably be overkill, and i don't need PHP.
Any comments/questions welcome!
@György-Farkas thanks for confirming that - i thought i'd missed something.
Hello Mods,
I'm disturbed by the number of spam posts appearing recently. Like the majority of visitors here, i come for the technical discussions, not to read some scammy schemes cluttering up a valuable resource. It also detracts from the brand. So please sort it out!
Device Firmware Version: 0.2.2 b200
i think i've tried all variations of this command now and still can't seem to shut my Omega 2P down fully; it tells me it's "shutting down / bye" but then decides to reboot.
Is there anything else i can try?