hammer@duocore2:~$ sudo apt-get install autoconf
Reading package lists... Done
Building dependency tree
Reading state information... Done
autoconf is already the newest version.
The following packages were automatically installed and are no longer required:
  libphysfs-1.0-0
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
hammer@duocore2:~$