#passwd

backup       games        list         news         sshd         telnetd
bin          gnats        lp           nobody       statd        user
daemon       irc          mail         proxy        sync         uucp
Debian-exim  libuuid      man          root         sys          www-data

#echo $

$_                           $L3_TAMPERED_EDITORS
$BASH                        $LANG
$BASH_ALIASES                $LANGUAGE
$BASH_ARGC                   $LINENO
$BASH_ARGV                   $LINES
$BASH_CMDS                   $LOGNAME
$BASH_COMMAND                $MACHTYPE
$BASH_COMPLETION             $MAIL
$BASH_COMPLETION_COMPAT_DIR  $MAILCHECK
$BASH_COMPLETION_DIR         $old_file
$BASH_LINENO                 $OPTERR
$BASHOPTS                    $OPTIND
$BASHPID                     $OSTYPE
$BASH_SOURCE                 $PATH
$BASH_SUBSHELL               $PIPESTATUS
$BASH_VERSINFO               $PPID
$BASH_VERSION                $PS1
$COLUMNS                     $PS2
$COMP_WORDBREAKS             $PS4
$DIFFNAME                    $PWD
$DIR                         $RANDOM
$DIRSTACK                    $_scp_path_esc
$editor_file                 $SECONDS

#ifconfig

.aptitude/     dir4/          file8          .lilalo/       .vim/
.bash_history  dir5/          file9          link           .viminfo
.bash_profile  file10         hard_link      .mc/           .vimrc
.bashrc        file123        inittab        passwd         wilen123
dir1/          file3          .l3rc          .profile       wilen124
dir2/          file6          .lesshst       .ssh/

#ls /etc/bash_completion

bash_completion    bash_completion.d/

abook          gdb              medusa             rpmcheck
ant            genisoimage      minicom            rrdtool
apache2ctl     getent           mkinitrd           rsync
apt            gkrellm          module-init-tools  rtcwake
apt-build      gnatmake         monodevelop        samba
aptitude       gpg              mount              sbcl
aspell         gpg2             mplayer            screen
autorpm        gzip             msynctool          service
bash-builtins  heimdal          munin-node         shadow
bind-utils     hping2           mutt               sitecopy
bitkeeper      iconv            mysqladmin         smartctl
bittorrent     ifupdown         ncftp              snownews
bluez          imagemagick      net-tools          ssh
brctl          info             nmap               sshfs
bzip2          initramfs-tools  ntpdate            strace
cardctl        insserv          openldap           svk
cfengine       ipmitool         openssl            sysctl
chkconfig      ipsec            p4                 sysv-rc
chsh           iptables         perl               tar
cksfv          ipv6calc         pine               tcpdump
clisp          isql             pkg-config         unace
configure      jar              pkg_install        unrar
coreutils      java             pkgtools           update-alternatives
cowsay         k3b              pm-utils           util-linux
cpan2dist      kldload          pon                vncviewer
cpio           konwert          portupgrade        vpnc
cryptsetup     larch            postfix            wireless-tools
cups           ldapvi           postgresql         wodim
cvs            lftp             povray             wol
cvsps          lilo             procps             wtf
dd             links            python             wvdial
debconf        lintian          qdbus              xhost
dhclient       lisp             qemu               xm
dict           lvm              quota-tools        xmllint
dpkg           lzma             rcs                xmlwf
dselect        lzop             rdesktop           xmms
dsniff         mailman          reportbug          xrandr
findutils      make             resolvconf         xsltproc
freeciv        man              rfkill             xz
fuse           mc               ri                 yp-tools
gcc            mcrypt           rpcdebug           yum-arch
gcl            mdadm            rpm