${CDPATH}
${DIRSTACK}
${HOME}
${HOSTNAME}
${IFS}
${OLDPWD}
${OSTYPE}
${PATH}
${PWD}
$CDPATH
$DIRSTACK
$HOME
$HOSTNAME
$IFS
$OLDPWD
$OSTYPE
$PATH
$PWD
bin/bash
bin/cat
bin/csh
bin/dash
bin/du
bin/echo
bin/grep
bin/less
bin/ls
bin/mknod
bin/more
bin/nc
bin/ps
bin/rbash
bin/sh
bin/sleep
bin/su
bin/tcsh
bin/uname
dev/fd/
dev/null
dev/stderr
dev/stdin
dev/stdout
dev/tcp/
dev/udp/
dev/zero
etc/group
etc/master.passwd
etc/passwd
etc/pwd.db
etc/shadow
etc/shells
etc/spwd.db
proc/self/
usr/bin/awk
usr/bin/base64
usr/bin/cat
usr/bin/cc
usr/bin/clang
usr/bin/clang++
usr/bin/curl
usr/bin/diff
usr/bin/env
usr/bin/fetch
usr/bin/file
usr/bin/find
usr/bin/ftp
usr/bin/gawk
usr/bin/gcc
usr/bin/head
usr/bin/hexdump
usr/bin/id
usr/bin/less
usr/bin/ln
usr/bin/mkfifo
usr/bin/more
usr/bin/nc
usr/bin/ncat
usr/bin/nice
usr/bin/nmap
usr/bin/perl
usr/bin/php
usr/bin/php5
usr/bin/php7
usr/bin/php-cgi
usr/bin/printf
usr/bin/psed
usr/bin/python
usr/bin/python2
usr/bin/python3
usr/bin/ruby
usr/bin/sed
usr/bin/socat
usr/bin/tail
usr/bin/tee
usr/bin/telnet
usr/bin/top
usr/bin/uname
usr/bin/wget
usr/bin/who
usr/bin/whoami
usr/bin/xargs
usr/bin/xxd
usr/bin/yes
usr/local/bin/bash
usr/local/bin/curl
usr/local/bin/ncat
usr/local/bin/nmap
usr/local/bin/perl
usr/local/bin/php
usr/local/bin/python
usr/local/bin/python2
usr/local/bin/python3
usr/local/bin/rbash
usr/local/bin/ruby
usr/local/bin/wget