diff --git a/module6.ipynb b/module6.ipynb
index dfe18e2..c5224c1 100644
--- a/module6.ipynb
+++ b/module6.ipynb
@@ -446,6 +446,121 @@
    "source": [
     "for i in $(cat story.txt); do B=`echo -n \"${i:0:1}\" | tr \"[:lower:]\" \"[:upper:]\"`; echo -n \"${B}${i:1} \"; done; echo -e \"\\n\""
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Edit files using substrings"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "cat ~/data/list.txt\n",
+    "\n",
+    "# 001 jane /data/jane_profile_07272018.doc\n",
+    "# 002 kwood /data/kwood_profile_04022017.doc\n",
+    "# 003 pchow /data/pchow_profile_05152019.doc\n",
+    "# 004 janez /data/janez_profile_11042019.doc\n",
+    "# 005 jane /data/jane_pic_07282018.jpg\n",
+    "# 006 kwood /data/kwood_pic_04032017.jpg\n",
+    "# 007 pchow /data/pchow_pic_05162019.jpg\n",
+    "# 008 jane /data/jane_contact_07292018.csv\n",
+    "# 009 kwood /data/kwood_contact_04042017.csv\n",
+    "# 010 pchow /data/pchow_contact_05172019.csv"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "grep 'jane' ~/data/list.txt\n",
+    "\n",
+    "# 001 jane /data/jane_profile_07272018.doc\n",
+    "# 004 janez /data/janez_profile_11042019.doc\n",
+    "# 005 jane /data/jane_pic_07282018.jpg\n",
+    "# 008 jane /data/jane_contact_07292018.csv"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "grep ' jane ' ~/data/list.txt\n",
+    "\n",
+    "# 001 jane /data/jane_profile_07272018.doc\n",
+    "# 005 jane /data/jane_pic_07282018.jpg\n",
+    "# 008 jane /data/jane_contact_07292018.csv"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "grep \" jane \" ~/data/list.txt | cut -d ' ' -f 3\n",
+    "\n",
+    "# /data/jane_profile_07272018.doc\n",
+    "# /data/jane_pic_07282018.jpg\n",
+    "# /data/jane_contact_07292018.csv"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# To return a range of fields together\n",
+    "grep \" jane \" ~/data/list.txt | cut -d ' ' -f 1-3\n",
+    "# To return a set of fields together\n",
+    "grep \" jane \" ~/data/list.txt | cut -d ' ' -f 1,3"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Find files using bash script\n",
+    "\n",
+    "#!/bin/bash\n",
+    "> oldFiles.txt\n",
+    "files=$(grep \" jane \" ../data/list.txt | cut -d ' ' -f 3);\n",
+    "for file in $files; do\n",
+    "  if test -e \"..${file}\"; then echo \"..${file}\" >> oldFiles.txt; fi\n",
+    "done\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Rename files using Python script\n",
+    "\n",
+    "#!/usr/bin/env python3\n",
+    "import sys\n",
+    "import subprocess\n",
+    "with open(sys.argv[1]) as file:\n",
+    "  lines = file.readlines()\n",
+    "  for line in lines:\n",
+    "    oldvalue = line.strip()\n",
+    "    newvalue = oldvalue.replace(\"jane\", \"jdoe\")\n",
+    "    subprocess.run([\"mv\", oldvalue, newvalue])\n",
+    "file.close()\n"
+   ]
   }
  ],
  "metadata": {
diff --git a/module7.ipynb b/module7.ipynb
index 709d82c..5621f7e 100644
--- a/module7.ipynb
+++ b/module7.ipynb
@@ -1,5 +1,12 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Final Project"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,