ryan@rkavanagh:~$ sudo aptitude install opera
Reading package lists... Done
Building dependency tree... Done
Reading extended state information
Initializing package states... Done
Reading task descriptions... Done
Building tag database... Done
The following packages have been kept back:
  compiz compiz-gnome compiz-kde
The following NEW packages will be installed:
  opera
0 packages upgraded, 1 newly installed, 0 to remove and 3 not upgraded.
Need to get 5545kB of archives. After unpacking 12.7MB will be used.
Writing extended state information... Done
Get:1 http://archive.canonical.com dapper-commercial/main opera 9.00-20060616.7 [5545kB]
Fetched 5545kB in 18s (306kB/s)
Selecting previously deselected package opera.
(Reading database ... 288780 files and directories currently installed.)
Unpacking opera (from .../opera_9.00-20060616.7_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/opera_9.00-20060616.7_i386.deb (--unpack):
 fork failed: Cannot allocate memory
dpkg: error while cleaning up:
 fork failed: Cannot allocate memory
dpkg: error while cleaning up:
 fork failed: Cannot allocate memory
Errors were encountered while processing:
 /var/cache/apt/archives/opera_9.00-20060616.7_i386.deb
Processing was halted because there were too many errors.
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover:
ryan@rkavanagh:~$