diff --git a/minindn/util.py b/minindn/util.py
new file mode 100644
index 0000000..dd46557
--- /dev/null
+++ b/minindn/util.py
@@ -0,0 +1,77 @@
+# -*- Mode:python; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+#
+# Copyright (C) 2015-2019, The University of Memphis,
+#                          Arizona Board of Regents,
+#                          Regents of the University of California.
+#
+# This file is part of Mini-NDN.
+# See AUTHORS.md for a complete list of Mini-NDN authors and contributors.
+#
+# Mini-NDN is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Mini-NDN is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Mini-NDN, e.g., in COPYING.md file.
+# If not, see <http://www.gnu.org/licenses/>.
+
+import sys
+from os.path import isfile
+from subprocess import call
+from mininet.cli import CLI
+
+sshbase = ['ssh', '-q', '-t', '-i/home/mininet/.ssh/id_rsa']
+scpbase = ['scp', '-i', '/home/mininet/.ssh/id_rsa']
+devnull = open('/dev/null', 'w')
+
+def ssh(login, cmd):
+    rcmd = sshbase + [login, cmd]
+    call(rcmd, stdout=devnull, stderr=devnull)
+
+def scp(*args):
+    tmp = []
+    for arg in args:
+        tmp.append(arg)
+    rcmd = scpbase + tmp
+    call(rcmd, stdout=devnull, stderr=devnull)
+
+def copyExistentFile(node, fileList, destination):
+    for f in fileList:
+        if isfile(f):
+            node.cmd('cp {} {}'.format(f, destination))
+            break
+    if not isfile(destination):
+        fileName = destination.split('/')[-1]
+        raise IOError('{} not found in expected directory.'.format(fileName))
+
+def popenGetEnv(node, envDict=None):
+    env = {}
+    homeDir = node.params['params']['homeDir']
+    printenv = node.popen('printenv'.split(), cwd=homeDir).communicate()[0].decode('utf-8')
+    for var in printenv.split('\n'):
+        if var == '':
+            break
+        p = var.split('=')
+        env[p[0]] = p[1]
+    env['HOME'] = homeDir
+
+    if envDict is not None:
+        for key, value in envDict.items():
+            env[key] = str(value)
+
+    return env
+
+def getPopen(host, cmd, envDict=None, **params):
+    return host.popen(cmd, cwd=host.params['params']['homeDir'],
+                      env=popenGetEnv(host, envDict), **params)
+
+class MiniNDNCLI(CLI):
+    prompt = 'mini-ndn> '
+    def __init__(self, mininet, stdin=sys.stdin, script=None):
+        CLI.__init__(self, mininet, stdin, script)