sudo apt-get install irssi
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  irssi-scripts
The following NEW packages will be installed:
  irssi
0 upgraded, 1 newly installed, 0 to remove and 111 not upgraded.
Need to get 0 B/894 kB of archives.
After this operation, 2458 kB of additional disk space will be used.
dpkg: error: corrupt info database format file '/var/lib/dpkg/info/format'
E: Sub-process /usr/bin/dpkg returned an error code (2)