Nokia-N800-10:~# busybox BusyBox v1.1.3 (Debian 3:1.1.3-3.sdk3) 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: [, [[, ash, awk, basename, busybox, cat, chgrp, chmod, chown, chroot, chvt, clear, cmp, cp, cut, date, dd, df, dirname, dmesg, du, echo, egrep, env, expr, false, fgrep, find, free, fuser, getty, grep, gunzip, gzip, head, hostname, id, ifconfig, ifdown, ifup, insmod, kill, killall, last, ln, logger, login, ls, lsmod, mkdir, mkfifo, mknod, mktemp, modprobe, more, mv, netstat, nslookup, pivot_root, printf, ps, pwd, readlink, realpath, renice, reset, rm, rmdir, rmmod, route, run-parts, sed, seq, sh, sleep, sort, stty, su, sync, sysctl, tail, tar, tee, test, time, top, touch, tr, true, tty, uname, uniq, uptime, vi, wc, which, who, whoami, xargs, yes, zcat
vi is an internal busybox command, as is awk. Impressive.