i# apt-get install postgresql
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  postgresql
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/42.5 kB of archives.
After this operation, 66.6 kB of additional disk space will be used.
Selecting previously unselected package postgresql.
(Reading database ... 39512 files and directories currently installed.)
Unpacking postgresql (from .../postgresql_9.1+134wheezy4_all.deb) ...
Setting up postgresql (9.1+134wheezy4) ...