~/MyDocs/.documents $ sudo dpkg -i lightningbeam_armel.deb 
Selecting previously deselected package lightningbeam.
(Reading database ... 30289 files and directories currently installed.)
Unpacking lightningbeam (from lightningbeam_armel.deb) ...
dpkg: dependency problems prevent configuration of lightningbeam:
 lightningbeam depends on libc; however:
  Package libc is not installed.
dpkg: error processing lightningbeam (--install):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 lightningbeam

~/MyDocs/.documents $ sudo apt-get install libc
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package libc is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package libc has no installation candidate