The idea is to use an old hard drive and create a time machine backup solution for mac, using a Raspberry i. It shall be available on the wifi, only connected to power.
Install Ubuntu Mate for Raspberry Pi by following these instructions.
I got an error when I tried to write to the memory card using ddrescue: Direct disc access not available., so I used dd instead with this command:
sudo dd bs=1m if=ubuntu-mate-16.04-desktop-armhf-raspberry-pi.img of=/dev/rdisk2
Resize the memory card as described in the Raspberry Pi instructions so you can use the whole memory card.
Upgrade all software using "ubuntu-mate-welcome" (The welcome dialog in the GUI.)
Set up incoming ssh using the command sudo apt-get install openssh-server
Install public id with ssh-copy-id <login>@<server> in order to ssh directly in to the mate.
Avoid that the wifi turns off by sudo vi /etc/pm/config.d/config. Add the line
SUSPEND_MODULES="iwlwifi"
Here is my /etc/network/interfaces:
auto lo wlan0
iface lo inet loopback
iface default inet dhcp
Also make sure that you have a file for your SSID (named as your SSID) in /etc/NetworkManager/system-connections. See this post for info.
Make sure that the file is rw for user:
sudo chmod 600 <filename>
A trick to regularly make sure the network is used is to create the file /usr/local/bin/checkwlan with this script:
#!/bin/bash
wlan=$(/sbin/ifconfig wlan0 | grep inet\ addr -c)
if [ "$wlan" -eq 0 ]; then
/sbin/ifdown wlan0 && /sbin/ifup wlan0
else
echo interface is up
fi
And call this regularly using crontab sudo crontab -e:
# Check wlan
10 * * * * /usr/local/bin/checkwlan 2>&1 | logger
I used Ubuntu mate instructions for this...
Get hardware information: sudo lshw -C disk
My disk has data on it, so I don't want to format it now.
Make a mount point: sudo mkdir /media/disk1
Add this to the end of /etc/fstab so the drive is mounted at boot:
/dev/sda2 /media/disk1 ext4 defaults 0 2
That is if the filesystem is ext4. You can check with sudo parted -l
Set up time machine following these instructions
Here are my commands:
# Install:
sudo apt-get install netatalk avahi-daemon
# Add user(s):
sudo adduser otto
sudo adduser hilde
sudo adduser magnus
# Create directory for the backup:
sudo mkdir /home/otto/timemachine
sudo mkdir /home/hilde/timemachine
sudo mkdir /home/magnus/timemachine
sudo chown -R otto /home/otto/timemachine/
sudo chown -R hilde /home/hilde/timemachine/
sudo chown -R magnus /home/magnus/timemachine/
# Backup old configuration file:
sudo mv /etc/netatalk/AppleVolumes.default /etc/netatalk/AppleVolumes.default.old
# Create new configuration file
sudo vi /etc/netatalk/AppleVolumes.default
# Add the following lines to the file:
:DEFAULT: options:upriv,usedots
/home/otto/timemachine "Otto's Time Machine" options:tm volsizelimit:300000 allow:otto
/home/hilde/timemachine "Hilde's Time Machine" options:tm volsizelimit:300000 allow:hilde
/home/magnus/timemachine "Magnus' Time Machine" options:tm volsizelimit:300000 allow:magnus
# The restart the service
sudo service netatalk restart
Then on your mac, open Finder and press ⌘+K to connect to server. Then type afp://<server-ip>/. Log in with the username created above, and connect. You will be asked for password. If all goes well, you will open your time machine as a network drive.
Then open System Preferences->Time Machine, click “Select Disk…” and select your new server under “Available Disks”. Log in with the same credentials.
You can turn the graphical interface off and on with these commands:
sudo graphical disable
sudo graphical enable
Update the kernel with
sudo rpi-update