Nokia-N900:~# apt-get install --reinstall kernel-flasher
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 3 not upgraded.
Need to get 0B/157kB of archives.
After this operation, 0B of additional disk space will be used.
Do you want to continue [Y/n]? y
(Reading database ... 55183 files and directories currently installed.)
Preparing to replace kernel-flasher 2.6.28-20103103+0m5 (using .../kernel-flasher_2.6.28-20103103+0m5_armel.deb) ...
Unpacking replacement kernel-flasher ...
Setting up kernel-flasher (2.6.28-20103103+0m5) ...