Тут единственный выход ... format / ;)

1. root@Router:/mnt/flashka# apt-get install java-package
обновил

2. скачал 2sdk-1_4_2_13-linux-i586.bin
root@Router:/mnt/flashka# make-jpkg j2sdk-1_4_2_13-linux-i586.bin
You are real root -- unfortunately, some Java distributions have
install scripts that directly manipulate /etc, and may cause some
inconsistencies on your system. Instead, you should become a
non-root user and run:

fakeroot make-jpkg j2sdk-1_4_2_13-linux-i586.bin

which will allow no damage to be done to your system files and
still permit the Java distribution to successfully extract.

Aborting.

в чем трабла могет быть?

system: ubuntu 6.10

Create debian package:
    dh_testdir
    dh_testroot
    dh_installchangelogs
    dh_installdocs
    dh_compress
    dh_fixperms
    dh_installdeb
    dh_shlibdeps
dpkg-shlibdeps: warning: could not find any packages for libXp.so.6
dpkg-shlibdeps: warning: unable to find dependency information for shared library libXp (soname 6, path libXp.so.6, dependency field Depends)
dpkg-shlibdeps: warning: could not find any packages for libXt.so.6
dpkg-shlibdeps: warning: unable to find dependency information for shared library libXt (soname 6, path libXt.so.6, dependency field Depends)
dpkg-shlibdeps: warning: could not find any packages for libXext.so.6
dpkg-shlibdeps: warning: unable to find dependency information for shared library libXext (soname 6, path libXext.so.6, dependency field Depends)
dpkg-shlibdeps: warning: could not find any packages for libXtst.so.6
dpkg-shlibdeps: warning: unable to find dependency information for shared librar
dpkg-shlibdeps: warning: could not find any packages for libXt.so.6
dpkg-shlibdeps: warning: unable to find dependency information for shared librar
dpkg-shlibdeps: warning: could not find any packages for libXext.so.6
dpkg-shlibdeps: warning: unable to find dependency information for shared librar
dpkg-shlibdeps: warning: could not find any packages for libXtst.so.6
dpkg-shlibdeps: warning: unable to find dependency information for shared librar
dpkg-shlibdeps: warning: could not find any packages for libXi.so.6
dpkg-shlibdeps: warning: unable to find dependency information for shared librar
dpkg-shlibdeps: warning: could not find any packages for libXt.so.6
dpkg-shlibdeps: warning: unable to find dependency information for shared librar
dpkg-shlibdeps: warning: could not find any packages for libXt.so.6
dpkg-shlibdeps: warning: unable to find dependency information for shared librar
dpkg-shlibdeps: warning: could not find any packages for libXt.so.6
dpkg-shlibdeps: warning: unable to find dependency information for shared librar
dpkg-shlibdeps: warning: could not find any packages for libXt.so.6
dpkg-shlibdeps: warning: unable to find dependency information for shared librar
    dh_gencontrol
    dh_md5sums
    dh_builddeb
dpkg-deb: building package `sun-j2sdk1.4' in `/tmp/make-jpkg.CHJxkl5028/sun-j2sd
tar: -: file name read contains nul character
    copy sun-j2sdk1.4_1.4.2+13_i386.deb into directory /opt/
cp: cannot create regular file `/opt/sun-j2sdk1.4_1.4.2+13_i386.deb': Permission denied

Aborted (/opt/).

Removing temporary directory: done