diff --git a/commands/linux.ipynb b/commands/linux.ipynb
index 92a6931..3c90cc2 100644
--- a/commands/linux.ipynb
+++ b/commands/linux.ipynb
@@ -1,7 +1,7 @@
 {
  "metadata": {
   "name": "",
-  "signature": "sha256:4515e5f88373961da62945f02e97b93ca0c73478b952696d14d5cd396af307f1"
+  "signature": "sha256:aa55f3f5af827289e0e805beeac7bc3bafcc5a85403717370daaa909851ea0c4"
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -16,7 +16,7 @@
       "\n",
       "* Disk Usage\n",
       "* Splitting Files\n",
-      "* Grep\n",
+      "* Grep, Sed\n",
       "* Compression\n",
       "* Curl\n",
       "* View Running Processes\n",
@@ -178,14 +178,14 @@
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "## Grep"
+      "## Grep, Sed"
      ]
     },
     {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "Check number of files matching \u201c.txt\":"
+      "List number of files matching \u201c.txt\":"
      ]
     },
     {
@@ -215,6 +215,23 @@
      "metadata": {},
      "outputs": []
     },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "Delete matching lines in place:"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "sed -i '/Important Lines: /d\u2019 original_file"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": []
+    },
     {
      "cell_type": "markdown",
      "metadata": {},
@@ -313,6 +330,9 @@
       "# Display all running processes\n",
       "ps aux | less\n",
       "\n",
+      "# Display all matching running processes with full formatting\n",
+      "ps -ef | grep python\n",
+      "\n",
       "# See processes run by user dmartin\n",
       "ps -u dmartin\n",
       "\n",
@@ -406,12 +426,40 @@
       "Paste the current line:  p (P for paste above cursor)\n",
       "\n",
       "Quit without saving changes:  q!\n",
-      "Write the current file and quit:  :wq\n",
-      "\n",
-      "# Run the following command to enable the tutorial\n",
-      "vimtutor\n",
-      "\n",
-      "# Run the following commands to enable syntax colors\n",
+      "Write the current file and quit:  :wq"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": []
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "Run the following command to enable the tutorial:"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "vimtutor"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": []
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "Run the following commands to enable syntax colors:"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
       "cd ~\n",
       "vim .vimrc\n",
       "syntax on\n",