After update the package came the following message:

Preparing to replace aptitude 0.4.3-1 (using .../aptitude_0.4.4-1_i386.deb) ...

Unpacking replacement aptitude ...

dpkg: warning - unable to delete old directory `/var/lib/aptitude': Directory not empty

Setting up aptitude (0.4.4-1) ...

 

Server2:~# aptitude update

-bash: /usr/bin/aptitude: No such file or directory