aptitude purge '~c'
The following packages will be REMOVED:
  kdm{p}
0 packages upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
Need to get 0B of archives. After unpacking 0B will be used.
Do you want to continue? [Y/n/?] y
(Reading database ... 119465 files and directories currently installed.)
Removing kdm ...
Purging configuration files for kdm ...
rm: cannot remove `/etc/init/kdm.conf': No such file or directory
dpkg: error processing kdm (--purge):
 subprocess installed post-removal script returned error exit status 1
Errors were encountered while processing:
 kdm
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover:

root@aguitel-laptop:~#