diff --git a/challenge-base/Dockerfile b/challenge-base/Dockerfile
new file mode 100644
index 0000000..c2cdcd2
--- /dev/null
+++ b/challenge-base/Dockerfile
@@ -0,0 +1,26 @@
+FROM phusion/baseimage
+MAINTAINER Pavel Sviderski <ps@stepic.org>
+
+RUN apt-get update && apt-get --no-install-recommends -y install \
+    man wget vim nano screen tmux \
+    python python-pip python-virtualenv python3.4 python3-pip \
+    binutils build-essential gdb ltrace strace \
+    sqlite sqlite3 \
+ && apt-get clean \
+ && useradd -m box
+
+RUN rm -f /etc/service/sshd/down && /etc/my_init.d/00_regen_ssh_host_keys.sh \
+ && rm -rf /etc/service/cron /etc/service/syslog-forwarder /etc/service/syslog-ng \
+ && echo "box ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers.d/box \
+ && mkdir -p /.box/bashrc.d/root /.box/bashrc.d/box
+
+COPY ssh /root/.ssh
+COPY bashrc/root /root/.bashrc
+COPY bashrc/box /home/box/.bashrc
+
+COPY greeting /.box/greeting
+COPY start.sh /.box/start.sh
+
+EXPOSE 22
+
+CMD /.box/start.sh
diff --git a/challenge-base/bashrc/box b/challenge-base/bashrc/box
new file mode 100644
index 0000000..03b9782
--- /dev/null
+++ b/challenge-base/bashrc/box
@@ -0,0 +1,8 @@
+PS1='\[\033[01;32m\]\u\[\033[01;33m\]@\[\033[01;32m\]\h: \[\033[01;33m\]\w \[\033[01;35m\]\$ \[\033[00m\]'
+alias ls="ls --color=auto"
+
+cd ~/
+
+while read bashrc_script; do
+    source "$bashrc_script"
+done < <(find /.box/bashrc.d /.box/bashrc.d/box -maxdepth 1 -type f)
diff --git a/challenge-base/bashrc/root b/challenge-base/bashrc/root
new file mode 100644
index 0000000..84b5b3e
--- /dev/null
+++ b/challenge-base/bashrc/root
@@ -0,0 +1,8 @@
+PS1='\[\033[01;32m\]\u\[\033[01;33m\]@\[\033[01;32m\]\h: \[\033[01;33m\]\w \[\033[01;35m\]\$ \[\033[00m\]'
+alias ls="ls --color=auto"
+
+cd ~/
+
+while read bashrc_script; do
+    source "$bashrc_script"
+done < <(find /.box/bashrc.d /.box/bashrc.d/root -maxdepth 1 -type f)
diff --git a/challenge-base/greeting b/challenge-base/greeting
new file mode 100644
index 0000000..95a879f
--- /dev/null
+++ b/challenge-base/greeting
@@ -0,0 +1,20 @@
+Welcome to Linux Challenge on
+      _             _
+     | |           (_)
+  ___| |_ ___ _ __  _  ___   ___  _ __ __ _
+ / __| __/ _ \ '_ \| |/ __| / _ \| '__/ _` |
+ \__ \ ||  __/ |_) | | (__ | (_) | | | (_| |
+ |___/\__\___| .__/|_|\___(_)___/|_|  \__, |
+             | |                       __/ |
+             |_|                      |___/
+
+This box runs Ubuntu 14.04. You are logged in as user "box".
+To run a command as administrator (user "root"), use "sudo <command>".
+ * Documentation: https://help.ubuntu.com/
+
+Web terminal usage
+==================
+ * Click the titlebar to drag
+ * Double-click the titlebar to maximize
+ * Click and drag the lower-right corner to resize
+
diff --git a/challenge-base/ssh/authorized_keys b/challenge-base/ssh/authorized_keys
new file mode 100644
index 0000000..2c9a7f9
--- /dev/null
+++ b/challenge-base/ssh/authorized_keys
@@ -0,0 +1 @@
+ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC6Tx8U13CktlFNP4uFncrbXTWGweyVDG8KfuM+csoLfXp9VRYUZGpuFELKrfhgPaTjvRv0JfVCvoOWLsflma87k0Bq8s5OIPujAblwP1oBXFGOa//iSMOtZO9AtYYQwDhI7AUNlgAAsrmoPBzsQ1lHLbA+OAc5ckl9Vv+9l7xMZPyTaA894leuQSVNgYixwFmKKUBv+Go0w24CvYUDJL3KeIJCZDD7e7DzW2vACMYyjdfo3DDpNsabE9yfmsaITrs/zakESf3Gy6zUdTPgUo0NjIpT772BOmPK4cvWV3Lb9ExMH6psYqwh14B+Wz9gguDhkcdGioajXqNxKShRH/uF checker@checksystem
diff --git a/challenge-base/start.sh b/challenge-base/start.sh
new file mode 100755
index 0000000..a8f5bd8
--- /dev/null
+++ b/challenge-base/start.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# Start the SSH service
+/sbin/my_init --skip-startup-files &> /dev/null &
+
+# Display the bold prompt
+bold=$(tput bold)
+normal=$(tput sgr0)
+echo "${bold}Press ENTER to start hacking...${normal}"
+
+# Wait for ENTER
+trap '' 2  # mock SIGINT on CTRL+C
+read
+trap 2  # enable SIGINT
+
+# Print the greeting
+cat /.box/greeting 2> /dev/null
+
+while true; do
+    su box
+done