/ # ls
bin   dev   etc   jffs  lib   mmc   mnt   opt   proc  sbin  tmp   usr   var   www
/ # cd jffs
/jffs # mkdir /?
/jffs # ls
tmp
/jffs # mkdir /jffs/opt
/jffs # ls
opt  tmp
/jffs # mount -v -o bind /jffs/opt /opt
/jffs # ls
opt  tmp
/jffs # cd ..
/ # ls
bin   dev   etc   jffs  lib   mmc   mnt   opt   proc  sbin  tmp   usr   var   www
/ # cd opt
/opt # ls
/opt # cd ..
/ # cd jffs
/jffs # cd opt
/jffs/opt # mkdir etc
/jffs/opt # ls
etc
/jffs/opt # cd ..
/jffs # cd ..
/ # cd opt
/opt # ls
etc
/opt # cd etc
/opt/etc # vi /opt/etc/ipkg.conf
src unslung http://ipkg.nslu2-linux.org/feeds/optware/ddwrt/cross/stable
dest root /
/opt/etc # more ipkg.conf
src unslung http://ipkg.nslu2-linux.org/feeds/optware/ddwrt/cross/stable
dest root /
/opt/etc # export IPKG_CONF_DIR=/opt/etc
/opt/etc # ipkg update
/opt/etc #
/opt/etc #