気になっていたんだけど、現在(2017-04-07)ubuntuで使えるbusyboxのツール群は、以下の感じになっています。

ip commandもbusyboxに入っているあたりがナウいなという気持ちです。 しかも、viも入っている。だけど、ssl,sshなどが入っていないあたりがセキュアなものを意識しているなと。でもtelnetdは入ってるのは、わかっていて使うというなにか。ほんで今日の収穫は、yoctoが素晴らしい進捗を持っていることです。ここ数年間でしっかり進化しているし、コミュニティの熟成もできている。組み込みファンとして嬉しい。

➜  ~ busybox 
BusyBox v1.22.1 (Ubuntu 1:1.22.0-15ubuntu1) multi-call binary.
BusyBox is copyrighted by many authors between 1998-2012.
Licensed under GPLv2. See source distribution for detailed
copyright notices.

Usage: busybox [function [arguments]...]
   or: busybox --list[-full]
   or: busybox --install [-s] [DIR]
   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:
	[, [[, acpid, adjtimex, ar, arp, arping, ash, awk, basename, blockdev,
	brctl, bunzip2, bzcat, bzip2, cal, cat, chgrp, chmod, chown, chpasswd,
	chroot, chvt, clear, cmp, cp, cpio, crond, crontab, cttyhack, cut,
	date, dc, dd, deallocvt, depmod, devmem, df, diff, dirname, dmesg,
	dnsdomainname, dos2unix, dpkg, dpkg-deb, du, dumpkmap, dumpleases,
	echo, ed, egrep, env, expand, expr, false, fdisk, fgrep, find, fold,
	free, freeramdisk, fstrim, ftpget, ftpput, getopt, getty, grep, groups,
	gunzip, gzip, halt, head, hexdump, hostid, hostname, httpd, hwclock,
	id, ifconfig, ifdown, ifup, init, insmod, ionice, ip, ipcalc, kill,
	killall, klogd, last, less, ln, loadfont, loadkmap, logger, login,
	logname, logread, losetup, ls, lsmod, lzcat, lzma, lzop, lzopcat,
	md5sum, mdev, microcom, mkdir, mkfifo, mknod, mkswap, mktemp, modinfo,
	modprobe, more, mount, mt, mv, nameif, nc, netstat, nslookup, od,
	openvt, passwd, patch, pidof, ping, ping6, pivot_root, poweroff,
	printf, ps, pwd, rdate, readlink, realpath, reboot, renice, reset, rev,
	rm, rmdir, rmmod, route, rpm, rpm2cpio, run-parts, sed, seq,
	setkeycodes, setsid, sh, sha1sum, sha256sum, sha512sum, sleep, sort,
	start-stop-daemon, stat, static-sh, strings, stty, su, sulogin,
	swapoff, swapon, switch_root, sync, sysctl, syslogd, tac, tail, tar,
	taskset, tee, telnet, telnetd, test, tftp, time, timeout, top, touch,
	tr, traceroute, traceroute6, true, tty, tunctl, udhcpc, udhcpd, umount,
	uname, uncompress, unexpand, uniq, unix2dos, unlzma, unlzop, unxz,
	unzip, uptime, usleep, uudecode, uuencode, vconfig, vi, watch,
	watchdog, wc, wget, which, who, whoami, xargs, xz, xzcat, yes, zcat

pub 4096R/102EFFB8 2017-04-02 Kyohei Moriyama (sasukeh) flogofrein@gmail.com
Primary key fingerprint: 2BE2 1FA9 8F72 C692 1E37 6072 5440 EEBA 102E FFB8