/usr/bin/db2dvi
/usr/bin/db2html
/usr/bin/db2pdf
/usr/bin/db2ps
/usr/bin/db2rtf
/usr/bin/docbook2dvi
/usr/bin/docbook2html
/usr/bin/docbook2man
/usr/bin/docbook2pdf
/usr/bin/docbook2ps
/usr/bin/docbook2rtf
/usr/bin/docbook2tex
/usr/bin/docbook2texi
/usr/bin/docbook2txt
/usr/bin/jw
/usr/bin/sgmldiff
You may install this package on Debian with
apt-get
install docbook-utils