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$ sudo apt-get -oDebug::PkgProblemResolver=1 dist-upgrade

Reading package lists... Done

Building dependency tree      

Reading state information... Done

Calculating upgrade... Starting

Starting 2

Investigating (0) rpcbind [ i386 ] < none -> 0.2.0-7ubuntu1 > ( net )

Broken rpcbind:i386 Conflicts on portmap [ i386 ] < 6.0.0-1ubuntu2.2 > ( net )

  Considering portmap:i386 1 as a solution to rpcbind:i386 1

  Holding Back rpcbind:i386 rather than change portmap:i386

Investigating (0) nfs-common [ i386 ] < 1:1.2.0-4ubuntu4.2 -> 1:1.2.5-3ubuntu3 > ( net )

Broken nfs-common:i386 Depends on rpcbind [ i386 ] < none -> 0.2.0-7ubuntu1 > ( net ) (>= 0.2.0-6ubuntu1)

  Considering rpcbind:i386 1 as a solution to nfs-common:i386 1

  Holding Back nfs-common:i386 rather than change rpcbind:i386

Investigating (0) nfs-kernel-server [ i386 ] < 1:1.2.0-4ubuntu4.2 -> 1:1.2.5-3ubuntu3 > ( net )

Broken nfs-kernel-server:i386 Depends on nfs-common [ i386 ] < 1:1.2.0-4ubuntu4.2 -> 1:1.2.5-3ubuntu3 > ( net ) (= 1:1.2.5-3ubuntu3)

  Considering nfs-common:i386 1 as a solution to nfs-kernel-server:i386 0

  Holding Back nfs-kernel-server:i386 rather than change nfs-common:i386

 Try to Re-Instate (1) nfs-common:i386

 Try to Re-Instate (1) nfs-kernel-server:i386

Done

Done

The following packages have been kept back:

  nfs-common nfs-kernel-server

The following packages will be upgraded:

  krb5-locales libgssapi-krb5-2 libk5crypto3 libkrb5-3 libkrb5support0

5 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.

Need to get 595 kB of archives.

After this operation, 4,096 B disk space will be freed.

Do you want to continue [Y/n]?