[XDA-University] iZLeeP:
Thanks for the guide. One thing though, what's the difference in installing busybox. I've often seen this code

symlink("/system/xbin/busybox", "/system/bin/busybox");

run_program("/system/xbin/busybox", "--install", "-s", "/system/xbin");

whereas in others, they're just symlinks like in the op

symlink("busybox", "/system/xbin/[", "/system/xbin/[[",

"/system/xbin/adjtimex", "/system/xbin/arp", "/system/xbin/ash",

"/system/xbin/awk", "/system/xbin/base64", "/system/xbin/basename",

"/system/xbin/bbconfig", "/system/xbin/blkid", "/system/xbin/blockdev",

"/system/xbin/brctl", "/system/xbin/bunzip2", "/system/xbin/bzcat",

"/system/xbin/bzip2", "/system/xbin/cal", "/system/xbin/cat",

"/system/xbin/catv", "/system/xbin/chattr", "/system/xbin/chgrp",

"/system/xbin/chmod", "/system/xbin/chown", "/system/xbin/chroot",

"/system/xbin/clear", "/system/xbin/cmp", "/system/xbin/comm",

"/system/xbin/cp", "/system/xbin/cpio", "/system/xbin/crond",

"/system/xbin/crontab", "/system/xbin/cut", "/system/xbin/date",

"/system/xbin/dc", "/system/xbin/dd", "/system/xbin/depmod",

"/system/xbin/devmem", "/system/xbin/df", "/system/xbin/diff",

"/system/xbin/dirname", "/system/xbin/dmesg", "/system/xbin/dnsd",

"/system/xbin/dos2unix", "/system/xbin/du", "/system/xbin/echo",

"/system/xbin/ed", "/system/xbin/egrep", "/system/xbin/env",

"/system/xbin/expand", "/system/xbin/expr", "/system/xbin/false",

"/system/xbin/fbsplash", "/system/xbin/fdisk", "/system/xbin/fgrep",

"/system/xbin/find", "/system/xbin/flash_lock",

"/system/xbin/flash_unlock", "/system/xbin/flashcp",

"/system/xbin/flock", "/system/xbin/fold", "/system/xbin/free",

"/system/xbin/freeramdisk", "/system/xbin/fstrim", "/system/xbin/fsync",

"/system/xbin/ftpget", "/system/xbin/ftpput", "/system/xbin/fuser",

"/system/xbin/getopt", "/system/xbin/grep", "/system/xbin/groups",

"/system/xbin/gunzip", "/system/xbin/gzip", "/system/xbin/halt",

"/system/xbin/head", "/system/xbin/hexdump", "/system/xbin/id",

"/system/xbin/ifconfig", "/system/xbin/inetd", "/system/xbin/insmod",

"/system/xbin/install", "/system/xbin/ionice", "/system/xbin/iostat",

"/system/xbin/ip", "/system/xbin/kill", "/system/xbin/killall",

"/system/xbin/killall5", "/system/xbin/less", "/system/xbin/ln",

"/system/xbin/losetup", "/system/xbin/ls", "/system/xbin/lsattr",

"/system/xbin/lsmod", "/system/xbin/lsusb", "/system/xbin/lzcat",

"/system/xbin/lzma", "/system/xbin/lzop", "/system/xbin/lzopcat",

"/system/xbin/man", "/system/xbin/md5sum", "/system/xbin/mesg",

"/system/xbin/mkdir", "/system/xbin/mke2fs", "/system/xbin/mkfifo",

"/system/xbin/mkfs.ext2", "/system/xbin/mkfs.vfat",

"/system/xbin/mknod", "/system/xbin/mkswap", "/system/xbin/mktemp",

"/system/xbin/modinfo", "/system/xbin/modprobe", "/system/xbin/more",

"/system/xbin/mount", "/system/xbin/mountpoint", "/system/xbin/mpstat",

"/system/xbin/mv", "/system/xbin/nanddump", "/system/xbin/nandwrite",

"/system/xbin/nbd-client", "/system/xbin/netstat", "/system/xbin/nice",

"/system/xbin/nohup", "/system/xbin/nslookup", "/system/xbin/ntpd",

"/system/xbin/od", "/system/xbin/patch", "/system/xbin/pgrep",

"/system/xbin/pidof", "/system/xbin/ping", "/system/xbin/pipe_progress",

"/system/xbin/pkill", "/system/xbin/pmap", "/system/xbin/poweroff",

"/system/xbin/printenv", "/system/xbin/printf", "/system/xbin/ps",

"/system/xbin/pstree", "/system/xbin/pwd", "/system/xbin/pwdx",

"/system/xbin/rdev", "/system/xbin/readlink", "/system/xbin/realpath",

"/system/xbin/renice", "/system/xbin/reset", "/system/xbin/resize",

"/system/xbin/rev", "/system/xbin/rm", "/system/xbin/rmdir",

"/system/xbin/rmmod", "/system/xbin/route", "/system/xbin/run-parts",

"/system/xbin/rx", "/system/xbin/sed", "/system/xbin/seq",

"/system/xbin/setconsole", "/system/xbin/setserial",

"/system/xbin/setsid", "/system/xbin/sh", "/system/xbin/sha1sum",

"/system/xbin/sha256sum", "/system/xbin/sha3sum",

"/system/xbin/sha512sum", "/system/xbin/sleep", "/system/xbin/sort",

"/system/xbin/split", "/system/xbin/stat", "/system/xbin/strings",

"/system/xbin/stty", "/system/xbin/sum", "/system/xbin/swapoff",

"/system/xbin/swapon", "/system/xbin/sync", "/system/xbin/sysctl",

"/system/xbin/tac", "/system/xbin/tail", "/system/xbin/tar",

"/system/xbin/taskset", "/system/xbin/tee", "/system/xbin/telnet",

"/system/xbin/telnetd", "/system/xbin/test", "/system/xbin/tftp",

"/system/xbin/tftpd", "/system/xbin/time", "/system/xbin/timeout",

"/system/xbin/top", "/system/xbin/touch", "/system/xbin/tr",

"/system/xbin/traceroute", "/system/xbin/true", "/system/xbin/ttysize",

"/system/xbin/tune2fs", "/system/xbin/umount", "/system/xbin/uname",

"/system/xbin/uncompress", "/system/xbin/unexpand", "/system/xbin/uniq",

"/system/xbin/unix2dos", "/system/xbin/unlzma", "/system/xbin/unlzop",

"/system/xbin/unxz", "/system/xbin/unzip", "/system/xbin/uptime",

"/system/xbin/usleep", "/system/xbin/uudecode", "/system/xbin/uuencode",

"/system/xbin/vi", "/system/xbin/watch", "/system/xbin/wc",

"/system/xbin/wget", "/system/xbin/which", "/system/xbin/whoami",

"/system/xbin/xargs", "/system/xbin/xz", "/system/xbin/xzcat",

"/system/xbin/yes", "/system/xbin/zcat");