Currently defined functions:
[, [[, addgroup, adduser, ar, arp, ash, awk, base64, basename, bash, blkid, bunzip2, bzcat, cat, chattr, chgrp, chmod, chown,
chroot, chrt, clear, cmp, cp, crond, cut, date, dc, dd, delgroup, deluser, devmem, df, diff, dirname, dmesg, dnsdomainname,
dos2unix, du, echo, egrep, eject, env, ether-wake, expr, false, fatattr, fbset, fgrep, find, flock, fstrim, ftpd, fuser,
getopt, getty, grep, groups, gunzip, gzip, hdparm, head, hostname, id, ifconfig, ifdown, ifplugd, ifup, inetd, inotifyd,
ionice, ip, kill, killall, klogd, less, ln, loadkmap, logger, logname, logread, losetup, ls, lsattr, lsof, lspci, lsusb,
md5sum, mdev, mkdir, mkfifo, mknod, mkswap, mktemp, more, mount, mpstat, mv, nc, netstat, nice, nohup, nslookup, ntpd, od,
patch, printf, ps, pwd, rdate, rdev, readlink, readprofile, realpath, renice, reset, rfkill, rm, rmdir, route, run-parts, sed,
seq, setconsole, setlogcons, setserial, setsid, sh, sha1sum, sha256sum, sha3sum, sha512sum, shuf, sleep, sort,
start-stop-daemon, stat, strings, stty, sulogin, swapoff, swapon, switch_root, sync, sysctl, syslogd, tail, tar, taskset, tee,
telnet, telnetd, test, time, timeout, top, touch, tr, true, tty, tunctl, udhcpc, umount, uname, uniq, unix2dos, unlink, unxz,
unzip, uptime, users, usleep, vi, volname, watch, wc, wget, which, who, whoami, whois, xargs, xzcat, yes, zcat