Tgr's questions

I am trying to build a vagrant box from a VirtualBox machine. When I give vagrant up, I get an error saying

The following SSH command responded with a non-zero exit status.
Vagrant assumes that this means the command failed!

/sbin/ifup eth1

If I try to run the command manually, I get

/etc/network/interfaces:17: duplicate interface
ifup: couldn't read interfaces file "/etc/network/interfaces"

The network-related part of the vagrantfile is

config.vm.network :hostonly, "192.168.56.11"

(if I disable this line and use only a NAT interface, things work, but I would like both a NAT and a host-only network connection)

The contents of /etc/network/interfaces is

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug eth0
iface eth0 inet dhcp

allow-hotplug eth1
iface eth1 inet dhcp
#VAGRANT-BEGIN
# The contents below are automatically generated by Vagrant. Do not modify.
auto eth1
iface eth1 inet static
      address 192.168.56.11
      netmask 255.255.255.0
#VAGRANT-END

I tried commenting out the iface eth1 inet dhcp before packaging the machine, but it didn't have any effect (the line was not commented out on the vagrant box).

I am trying to recover a (MySQL) database from a crashed disk. There are a number of recent dumps, which are corrupted bz2 files. Since the database does not change often, the dumps should be nearly identical. bzip2recover recovered about 70-80% of the chunks from the files, so most if not all of the data could be recovered by finding the overlaps in the files and joining them together. For example:

dump1: |-----------------|xxxxxxxxxxxxxxxx|------------------|
dump2: |-------------|----------------|xxxxxxxxxxxxxxxxxxxxxx|
dump3: |xxxxxxxxxxxxxxxxxxxxxx|---------------|xxxxxxxxxxxxxx|

here I can detect that the first chunk in dump1 is continued by the second one in dump2, which is continued by the second in dump3, which is continued by the third in dump1. By joining these four files, I have recovered the data.

The problem is that there are thousands of files (I have ten dumps of ~400 1M chunks each). Is there a tool which could automate this process, or at least parts of it (like a linux command checking for the longest overlap between the end of one file and the start of another)?