Verschiedene Befehle, meist dann wenn sie nicht vorhanden sind oder weil sie in bestimmten Scripten (z.B. unter Scripte im WebIf von o***m) aufgerufen werden. Bin schon fertig, busybox als statisches Binary mit den fehlenden Befehlen. Einige andere habe ich rausgeschmissen (httpd, tftpd etc.)

Ist zwar estwas größer als die von HDMU, man könnte noch das eine oder andere entfernen, aber Platz habe ich noch genug.
sz:/bin# ll busybox
-rwxr-xr-x 1 root root 911064 Mar 19 11:08 busybox
Code:
sz:/bin# busybox
BusyBox v1.23.1 (2015-03-19 12:06:44 CET) 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, add-shell, addgroup, adduser, adjtimex, arp, arping, ash,
        awk, base64, basename, beep, blkid, blockdev, bootchartd, brctl,
        bunzip2, bzcat, bzip2, cal, cat, catv, chattr, chgrp, chmod, chown,
        chpasswd, chpst, chroot, chrt, chvt, cksum, clear, cmp, comm, conspy,
        cp, cpio, crond, crontab, cryptpw, cttyhack, cut, date, dc, dd,
        deallocvt, delgroup, deluser, depmod, devmem, df, diff, dirname, dmesg,
        dnsdomainname, dos2unix, du, dumpkmap, echo, ed, egrep, eject, env,
        envdir, envuidgid, ether-wake, expand, expr, fakeidentd, false,
        fatattr, fbset, fbsplash, fdflush, fdformat, fdisk, fgconsole, fgrep,
        find, findfs, flash_eraseall, flash_lock, flash_unlock, flashcp, flock,
        fold, free, freeramdisk, fsck, fsck.minix, fstrim, fsync, ftpget,
        ftpput, fuser, getopt, getty, grep, groups, gunzip, gzip, halt, hd,
        hdparm, head, hexdump, hostid, hostname, hush, hwclock, id, ifconfig,
        ifdown, ifenslave, ifplugd, ifup, inetd, init, insmod, install, ionice,
        iostat, ip, ipaddr, ipcalc, ipcrm, ipcs, iplink, iproute, iprule,
        iptunnel, kbd_mode, kill, killall, killall5, klogd, last, less,
        linux32, linux64, linuxrc, ln, loadfont, loadkmap, logger, login,
        logname, logread, losetup, ls, lsattr, lsmod, lsof, lspci, lsusb,
        lzcat, lzma, lzop, lzopcat, makedevs, man, md5sum, mdev, mesg,
        microcom, mkdir, mkdosfs, mke2fs, mkfifo, mkfs.ext2, mkfs.minix,
        mkfs.vfat, mknod, mkpasswd, mkswap, mktemp, modinfo, modprobe, more,
        mount, mountpoint, mpstat, mt, mv, nameif, nanddump, nandwrite,
        nbd-client, nc, netstat, nice, nmeter, nohup, nslookup, ntpd, od,
        openvt, passwd, patch, pgrep, pidof, ping, ping6, pipe_progress,
        pivot_root, pkill, pmap, poweroff, powertop, printenv, printf, ps,
        pscan, pstree, pwd, pwdx, rdate, rdev, readahead, readlink,
        readprofile, realpath, reboot, remove-shell, renice, reset, resize,
        rev, rm, rmdir, rmmod, route, rpm, rpm2cpio, rtcwake, run-parts,
        runlevel, runsv, runsvdir, rx, script, scriptreplay, sed, seq, setarch,
        setconsole, setfont, setkeycodes, setlogcons, setserial, setsid,
        setuidgid, sh, sha1sum, sha256sum, sha3sum, sha512sum, showkey, shuf,
        slattach, sleep, smemcap, 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, time, timeout, top, touch, tr, traceroute,
        traceroute6, true, tty, ttysize, tunctl, tune2fs, ubiattach, ubidetach,
        ubimkvol, ubirmvol, ubirsvol, ubiupdatevol, udhcpc, udpsvd, umount,
        uname, unexpand, uniq, unix2dos, unlink, unlzma, unlzop, unxz, unzip,
        uptime, users, usleep, uudecode, uuencode, vconfig, vi, vlock, volname,
        wall, watch, watchdog, wc, wget, which, who, whoami, whois, xargs, xz,
        xzcat, yes, zcat, zcip
MfG