timemachine linux setup

Install cfdisk
# apt-get install cfdisk

Install netatalk
# apt-get install netatalk
# update-rc.d netatalk defaults

Format new disk
# cfdisk /dev/sdx
# mkfs.ext4 /dev/sdx1
# vim /etc/fstab
  /dev/sdx1	/mnt/data	ext4	noexec,defaults	  0	  0
# mkdir -p /mnt/data
# mount -a
# mkdir -p /mnt/data/timecapsule

Add user
# useradd mthierry
# usermod -aG users mthierry
# chown mthierry:users /mnt/data/timecapsule 
# chmod 775 /mnt/data/timecapsule

Add TimeMachine (http://dae.me/blog/1660/concisest-guide-to-setting-up-time-machine-server-on-ubuntu-server-12-04/):
# vim /etc/netatalk/AppleVolumes.default
   /mnt/data/timecapsule/ "Raspi Time Machine" options:tm allow:mthierry

# service netatalk restart