[root@localhost gpl]# wget ftp://ftp.dlink.ru/pub/ADSL/GPL_source_code/RU_DSL-2640U/RU_DSL-2640U_3-06-04-3C_GPL.tar.gz

[root@localhost gpl]# gunzip -c RU_DSL-2640U_3-06-04-3C_GPL.tar.gz | tar xvf -
consumer_install
README
RU_DSL-2640U_3-06-04-3C_consumer.tar.gz
RU_DSL-2640U_3-06-04-3C_uclibc_crosstools_3.4.2_0.9.27.tar.gz

# echo /* 
/bin /dev /etc /lib /linuxrc /mnt /proc /sbin /usr /var /webs 
# echo /bin/* 
/bin/adsl /bin/adslctl /bin/atm /bin/atmctl /bin/bftpd /bin/brctl /bin/busybox /bin/cat /bin/cfm /bin/chmod
/bin/date /bin/ddnsd /bin/df /bin/dhcpc /bin/dhcpd /bin/dhcpr /bin/dmesg /bin/dnsprobe /bin/dumpmem
/bin/ebtables /bin/echo /bin/epi_ttcp /bin/ethctl /bin/false /bin/hotplug /bin/igmp /bin/iptables
/bin/kill /bin/ln /bin/mkdir /bin/mount /bin/msh /bin/nas /bin/nas4not /bin/netctl /bin/openssl /bin/ping
/bin/pppd /bin/ps /bin/pvc2684ctl /bin/pvc2684d /bin/pwd /bin/reaim /bin/ripd /bin/rm /bin/sendarp
/bin/setmem /bin/sh /bin/siproxd /bin/snmp /bin/sntp /bin/sysinfo /bin/tftpd /bin/true /bin/udhcpd
/bin/upnp /bin/wlctl /bin/zebra

** Press Enter to stop auto run (3 seconds) ***
Auto run second count down: 3
web info: Waiting for connection on socket 0.
CFE>
CFE> help
Available commands:

w                   Write the whole image start from beginning of the flash
e                   Erase [n]vram or [a]ll flash except bootrom
r                   Run program from flash image or from host depend on [f/h] flag
p                   Print boot line and board parameter info
c                   Change booline parameters
f                   Write image to the flash
i                   Erase persistent storage data
b                   Change board parameters
reset               Reset the board
flashimage          Flashes a compressed image after the bootloader.
help                Obtain help for CFE commands

For more information about a command, enter 'help command-name'
*** command status = 0