Here are some questions from the LPI certification exam level 1, exam B:
(state jan 2002)

How do you find from which package a file, e.g. XF86Config, was installed?
  dpkg --list XF86Config
  dpkg --audit XF86Config
  dpkg --search XF86Config
  dpkg --contents XF86Config
  dpkg --listfiles XF86Config

What is a reasonable command to install a set of debian packages stored in directory temp ?

  dpkg -I temp
  dpkg -iGRE temp
  dpkg -I temp/*.deb
  dpkg -iGRE temp/*.deb

How do you check a PGP signature of an RPM package?
  rpm --checksig package.rpm
  rpm -qp --checksig package.rpm
  rpm -qpil package.rpm
  rpm -Vpil package.rpm
  rpm -qV package.rpm

Generate a complete report for analyzing changes which may be security related?
  rpm -Va > report
  rpm -Qavy > report
  rpm -Vqt --nomd5 > report
  rpm --checkfiles > report
  rpm -Va --nofiles > report

How do you display the ChangeLog of an installed package foobar ?
  rpm -Vc foobar
  rpm -qpil foobar
  rpm --changelog foobar
  rpm -q --changelog foobar
  rpm -qa --changelog foobar

Which parameter do you use with lpr, to print a job 2 times ?
  lpr -#2 ??

Which IRQ is normally dedicated to the second printer port on a PC?
  IRQ 5
  IRQ 11
  LPT1
  LPT2
  DMA 330

How do you get a list of files that have been installed from a dpkg package?
  dpkg --list foobar
  dpkg --audit foobar
  dpkg --search foobar
  dpkg --contents foobar
  dpkg --listfiles foobar