APT-GET

ricardo@RLluis1597:~$ sudo apt-get install gdebi
[sudo] password for ricardo:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  gdebi-core
The following NEW packages will be installed:
  gdebi gdebi-core
0 upgraded, 2 newly installed, 0 to remove and 101 not upgraded.
Need to get 0 B/204 kB of archives.
After this operation, 1 454 kB of additional disk space will be used.
Do you want to continue [Y/n]? Y
dpkg: error: unable to create new file '/var/lib/dpkg/info/format-new': Is a directory
E: Sub-process /usr/bin/dpkg returned an error code (2)
ricardo@RLluis1597:~$


APTITUDE

ricardo@RLluis1597:~$ sudo aptitude install gdebi
The following NEW packages will be installed:
  gdebi gdebi-core{a}
0 packages upgraded, 2 newly installed, 0 to remove and 101 not upgraded.
Need to get 0 B/204 kB of archives. After unpacking 1 454 kB will be used.
Do you want to continue? [Y/n/?] Y
dpkg: error: unable to create new file '/var/lib/dpkg/info/format-new': Is a directory
E: Sub-process /usr/bin/dpkg returned an error code (2)
A package failed to install.  Trying to recover:
dpkg: error: unable to create new file '/var/lib/dpkg/info/format-new': Is a directory

ricardo@RLluis1597:~$