/system/bin/busybox

最初から busybox が入っていた。

# busybox
busybox
BusyBox v1.14.3 (2009-12-23 15:01:31 CST) multi-call binary
Copyright (C) 1998-2008 Erik Andersen, Rob Landley, Denys Vlasenko
and others. Licensed under GPLv2.
See source distribution for full notice.

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:
        [, [[, acpid, addgroup, adduser, adjtimex, ar, arp, arping,
        ash, awk, basename, blkid, brctl, bunzip2, bzcat, bzip2,
        cal, cat, catv, chat, chattr, chgrp, chmod, chown, chpasswd,
        chpst, chroot, chrt, chvt, cksum, clear, cmp, comm, cp,
        cpio, crond, crontab, cryptpw, cttyhack, cut, date, dc,
        dd, deallocvt, delgroup, deluser, depmod, devmem, df, dhcprelay,
        diff, dirname, dmesg, dnsd, dos2unix, du, dumpkmap, dumpleases,
        echo, ed, egrep, eject, env, envdir, envuidgid, ether-wake,
        expand, expr, fakeidentd, false, fbset, fbsplash, fdflush,
        fdformat, fdisk, fgrep, find, findfs, fold, free, freeramdisk,
        fsck, fsck.minix, ftpd, ftpget, ftpput, fuser, getopt, getty,
        grep, gunzip, gzip, halt, hd, hdparm, head, hexdump, hostid,
        hostname, httpd, hush, hwclock, id, ifconfig, ifdown, ifenslave,
        ifup, inetd, init, insmod, install, ionice, ip, ipaddr,
        ipcalc, ipcrm, ipcs, iplink, iproute, iprule, iptunnel,
        kbd_mode, kill, killall, killall5, klogd, last, length,
        less, linux32, linux64, linuxrc, ln, loadfont, loadkmap,
        logger, login, logname, logread, losetup, lpd, lpq, lpr,
        ls, lsattr, lsmod, lzmacat, makedevs, makemime, man, md5sum,
        mdev, mesg, microcom, mkdir, mkdosfs, mkfifo, mkfs.minix,
        mkfs.vfat, mknod, mkpasswd, mkswap, mktemp, modprobe, more,
        mount, mountpoint, msh, mt, mv, nameif, nc, netstat, nice,
        nmeter, nohup, nslookup, od, openvt, passwd, patch, pgrep,
        pidof, ping, ping6, pipe_progress, pivot_root, pkill, popmaildir,
        poweroff, printenv, printf, ps, pscan, pwd, raidautorun,
        rdate, rdev, readahead, readlink, readprofile, realpath,
        reboot, reformime, renice, reset, resize, rm, rmdir, rmmod,
        route, rtcwake, run-parts, runlevel, runsv, runsvdir, rx,
        script, sed, sendmail, seq, setarch, setconsole, setfont,
        setkeycodes, setlogcons, setsid, setuidgid, sh, sha1sum,
        sha256sum, sha512sum, showkey, slattach, sleep, softlimit,
        sort, split, start-stop-daemon, stat, strings, stty, su,
        sulogin, sum, sv, svlogd, swapoff, swapon, switch_root,
        sync, sysctl, syslogd, tac, tail, tar, tcpsvd, tee, telnet,
        telnetd, test, tftp, tftpd, time, timeout, top, touch, tr,
        traceroute, true, tty, ttysize, tunctl, udhcpc, udhcpd,
        udpsvd, umount, uname, uncompress, unexpand, uniq, unix2dos,
        unlzma, unzip, uptime, usleep, uudecode, uuencode, vconfig,
        vi, vlock, watch, watchdog, wc, wget, which, who, whoami,
        xargs, yes, zcat, zcip

機能は full に有効にしてあるよ。