/home/user # apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be upgraded:
theme-customizer
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0B/293kB of archives.
After this operation, 20.5kB of additional disk space will be used.
Do you want to continue [Y/n]? Y
(Reading database ... dpkg: unrecoverable fatal error, aborting:
unable to open files list file for package `theme-customizer': Stale NFS file handle
E: Sub-process /usr/bin/dpkg returned an error code (2)
/home/user #