Currently defined functions include:
-adjtimex, ar, basename, busybox, cat, chgrp, chmod, chown, chroot, chvt, clear,
-cmp, cp, cpio, cut, date, dc, dd, deallocvt, df, dirname, dmesg, dos2unix, dpkg,
-dpkg-deb, du, dumpkmap, dutmp, echo, expr, false, fbset, fdflush, find, free,
-freeramdisk, fsck.minix, getopt, grep, gunzip, gzip, halt, head, hostid,
-hostname, id, ifconfig, init, insmod, kill, killall, klogd, length, ln,
-loadacm, loadfont, loadkmap, logger, logname, ls, lsmod, makedevs, md5sum,
-mkdir, mkfifo, mkfs.minix, mknod, mkswap, mktemp, more, mount, mt, mv, nc,
-nslookup, ping, pivot_root, poweroff, printf, ps, pwd, rdate, readlink, reboot,
-renice, reset, rm, rmdir, rmmod, route, rpm2cpio, rpmunpack, sed, setkeycodes,
-sh, sleep, sort, stty, swapoff, swapon, sync, syslogd, tail, tar, tee, telnet,
-test, tftp, touch, tr, true, tty, umount, uname, uniq, unix2dos, update, uptime,
-usleep, uudecode, uuencode, watchdog, wc, wget, which, whoami, xargs, yes, zcat,
-[
+ addgroup, adduser, adjtimex, ar, arping, ash, awk, basename,
+ bunzip2, busybox, bzcat, cal, cat, chgrp, chmod, chown, chroot,
+ chvt, clear, cmp, cp, cpio, crond, crontab, cut, date, dc, dd,
+ deallocvt, delgroup, deluser, df, dirname, dmesg, dos2unix, dpkg,
+ dpkg-deb, du, dumpkmap, dumpleases, dutmp, echo, egrep, env, expr,
+ false, fbset, fdflush, fdformat, fgrep, find, fold, free, freeramdisk,
+ fsck.minix, ftpget, ftpput, getopt, getty, grep, gunzip, gzip,
+ halt, hdparm, head, hexdump, hostid, hostname, httpd, hush, hwclock,
+ id, ifconfig, ifdown, ifup, inetd, init, insmod, ip, ipcalc, iplink,
+ iproute, iptunnel, kill, killall, klogd, lash, length, linuxrc,
+ ln, loadacm, loadfont, loadkmap, logger, login, logname, logread,
+ losetup, ls, lsmod, makedevs, md5sum, mesg, minit, mkdir, mkfifo,
+ mkfs.minix, mknod, mkswap, mktemp, modprobe, more, mount, msh,
+ msvc, mt, mv, nameif, nc, netstat, nslookup, od, openvt, passwd,
+ patch, pidfilehack, pidof, ping, ping6, pivot_root, poweroff,
+ printf, ps, pwd, rdate, readlink, realpath, reboot, renice, reset,
+ rm, rmdir, rmmod, route, rpm, rpm2cpio, run-parts, sed, setkeycodes,
+ sha1sum, sleep, sort, start-stop-daemon, strings, stty, su, sulogin,
+ swapoff, swapon, sync, syslogd, tail, tar, tee, telnet, telnetd,
+ test, tftp, time, top, touch, tr, traceroute, true, tty, udhcpc,
+ udhcpd, umount, uname, uncompress, uniq, unix2dos, unzip,
+ uptime, usleep, uudecode, uuencode, vconfig, vi, vlock, watch,
+ watchdog, wc, wget, which, who, whoami, xargs, yes, zcat, [
=over 4
+