[root@Lost ~]   
[                        dumpmem                  ls                       pure-pwconvert           telnet 
[[                       ebtables                 lsmod                    pure-quotacheck          telnetd 
adsl                     echo                     mkdir                    pure-statsdecode         test 
adslctl                  egrep                    mount                    pure-uploadscript        test_nat_list 
arping                   env                      mv                       pvc2684ctl               test_plugin_route 
ash                      ethctl                   nas                      pvc2684d                 tftp 
atm                      expr                     nas4not                  pwd                      top 
atmctl                   false                    nat                      reboot                   touch 
autoconf                 free                     nbctl                    relayctl                 traceroute 
awk                      grep                     nbd                      rm                       true 
brctl                    head                     nbping                   rmmod                    udhcpc 
busybox                  hexdump                  net                      robocfg                  umount 
cat                      hostname                 netstat                  route                    uname 
chilli                   hotplug                  nice                     sed                      upnpd 
chmod                    ifconfig                 nslookup                 serialization            uptime 
chown                    inadyn                   nvram                    setmem                   vSStest 
clear                    init                     o3xmlparser              sh                       vconfig 
coldplug                 insmod                   p910nd                   sleep                    vi 
cp                       ip                       ping                     sntp                     vmstat 
cut                      ipkg-cl                  poll_voip_line_n_stack   sort                     vodsl 
date                     iptables                 pppd                     spawn-fcgi               voiceSSDiags 
ddnsd                    kill                     pppd_wrapper             stpHh9nq                 voip 
df                       killall                  ps                       sudo                     watchdog 
dmesg                    ledctl                   pure-authd               sysctl                   wget 
dnsmasq                  lighttpd                 pure-ftpd                syslog-ng                wl 
dsl                      ln                       pure-ftpwho              system                   wlan 
dsldiags                 logger                   pure-mrtginfo            tail                     wlctl 
du                       login                    pure-pw                  tc                       xupgrade 
[root@Lost ~] busybox
BusyBox v1.1.3 (2007.10.09-16:49+0000) multi-call binary

Usage: busybox [function] [arguments]...
   or: [function] [arguments]...

        BusyBox is a multi-call binary that combines many common Unix
        utilities into a single executable.  Most people will create a
        link to busybox for each function they wish to use and BusyBox
        will act like whatever it was invoked as!

Currently defined functions:
        [, [[, arping, ash, awk, busybox, cat, chmod, chown, clear, cp, cut, date, df, dmesg, du, echo, egrep, env, expr, false, grep,
        head, hexdump, hostname, ifconfig, init, insmod, kill, killall, linuxrc, ln, logger, login, ls, lsmod, mkdir, mount, mv, netstat,
        nice, nslookup, ping, pwd, rm, rmmod, route, sed, sh, sleep, sort, sysctl, tail, telnet, telnetd, test, tftp, touch, traceroute,
        true, udhcpc, umount, uname, uptime, vconfig, vi, wget

[root@Lost ~] cat /etc/fstab
proc    /proc         proc  defaults  0 0
tmpfs   /var          tmpfs size=10M 0 0
/dev/mtdblock2   /usr/local    jffs2 defaults 0 0
sysfs   /sys          sysfs defaults  0 0
usbfs   /proc/bus/usb usbfs defaults  0 0
[root@Lost ~] mount
/dev/root on / type squashfs (ro)
proc on /proc type proc (rw,nodiratime)
tmpfs on /var type tmpfs (rw)
/dev/mtdblock2 on /usr/local type jffs2 (rw,noatime)
sysfs on /sys type sysfs (rw)
usbfs on /proc/bus/usb type usbfs (rw)