tgirke · October 14, 2025 19:06 · Apr 4, 2019 · Jul 14, 2018 · Jul 14, 2018 · Jul 14, 2018
diff --git a/crouton.md b/crouton.md
@@ -65,7 +65,7 @@ For better integraton with Chrome OS install [Crouton Integraton extension](http
 
 ### iv. Install Crouton
 
-1. Download latest Crouton release from here [https://goo.gl/fd3zc](https://goo.gl/fd3zc) which comes form developer's repository [here](https://github.com/dnschneid/crouton/blob/master/README.md). For simplicity leave downloaded `crouton` file in Downloads folder.
+1. Download latest Crouton release from here [https://goo.gl/fd3zc](https://goo.gl/fd3zc) which comes form developer's repository [here](https://github.com/dnschneid/crouton/blob/master/README.md). For simplicity leave downloaded `crouton` file in Downloads folder. Note, as of April 2019 there may be changes to this approach due to security updates in Chrome. Here are some [updates](https://chromeunboxed.com/chrome-os-security-updates-break-crouton-heres-the-fix/amp/).
 
 2. Open in Chrome browser crosh shell with `CTRL + ALT + T` and then type
 

diff --git a/crouton.md b/crouton.md
@@ -21,7 +21,7 @@
     6. [Backup Chroot](#backup_chroot)
     7. [Software Installs](#software_installs)
 4. [Troubleshooting](#troubleshooting)
-    1. [Problem with apt-get](#apt-get_broken)
+    1. [Problem with apt (or apt-get)](#apt-get_broken)
 
 * * *
 
@@ -205,10 +205,10 @@ sudo sh ~/Downloads/crouton -f mybackup.tar.gz
 
 ### vii. Install software within Chroot
 
-Within a Chroot one should update and install software packages via `apt-get`, see example below. Detailed instructions for using `apt-get` are available on Ubuntu's [AptGet/Howto](https://help.ubuntu.com/community/AptGet/Howto). Installing software via Ubuntu's Software manager should be avoided since it creates often problems. The GDebi Package installer seems to work fine as an alternative. 
+Within a Chroot one should update and install software packages via `apt` or `apt-get`, see example below. Detailed instructions for using `apt` or `apt-get` are available on Ubuntu's [AptGet/Howto](https://help.ubuntu.com/community/AptGet/Howto). Installing software via Ubuntu's Software manager should be avoided since it creates often problems. The GDebi Package installer seems to work fine as an alternative. 
 
 ```sh
-sudo apt-get update && sudo apt-get install <my_software>
+sudo apt update && sudo apt install <my_software>
 ```
 
 <div id='troubleshooting'/>
@@ -217,35 +217,35 @@ sudo apt-get update && sudo apt-get install <my_software>
 
 <div id='apt-get_broken'/>
 
-#### i. Problem with `apt-get`
+#### i. Problem with `apt` or `apt-get`
 
-If `apt-get update` and/or `apt-get install` is not working then try the follwing troubleshooting steps. Additional help on this topic can be found [here](https://askubuntu.com/questions/309672/problem-with-sudo-apt-get-upgrade).
+If `apt update` and/or `apt install` are not working then try the follwing troubleshooting steps. Additional help on this topic can be found [here](https://askubuntu.com/questions/309672/problem-with-sudo-apt-get-upgrade).
 
 The `autoclean` command might fix the problem. Sometimes it may only work in a freshly started chroot session. So try restarting it if it fails, or start temporarily a chroot from crosh shell within a chrome browser tab with `sudo enter-chroot`, and then run update/install from there. 
 
 ```sh
 sudo apt clean && sudo apt autoclean # This might fix things
-sudo apt update # or with && sudo apt-get upgrade
+sudo apt update # or with && sudo apt upgrade
 ```
 
 After running `update` also try this
 
 ```sh
-sudo apt-get -f install 
+sudo apt -f install 
 ```
 
 Another reason could be a broken dpkg system. To fix this, run the following commands. 
 
 ```sh 
 sudo dpkg --configure -a
-sudo apt-get upgrade
-sudo apt-get update
+sudo apt upgrade
+sudo apt update
 ```
 
 Reinstalling `libcurl3-gnutls` has also been reported to help.
 
 ```sh
-sudo apt-get --reinstall install libcurl3-gnutls 
+sudo apt --reinstall install libcurl3-gnutls 
 ```
 
 There are also reports that using more RAM on the Chrome OS side might help. For this just open a few data/process intensive tabs in Chrome. Also check if there are any broken PPAs in `/etc/apt/sources.list.d`.
diff --git a/crouton.md b/crouton.md
@@ -224,8 +224,8 @@ If `apt-get update` and/or `apt-get install` is not working then try the follwin
 The `autoclean` command might fix the problem. Sometimes it may only work in a freshly started chroot session. So try restarting it if it fails, or start temporarily a chroot from crosh shell within a chrome browser tab with `sudo enter-chroot`, and then run update/install from there. 
 
 ```sh
-sudo apt-get clean && sudo apt-get autoclean # This might fix things
-sudo apt-get update # or with && sudo apt-get upgrade
+sudo apt clean && sudo apt autoclean # This might fix things
+sudo apt update # or with && sudo apt-get upgrade
 ```
 
 After running `update` also try this

diff --git a/crouton.md b/crouton.md
@@ -224,7 +224,7 @@ If `apt-get update` and/or `apt-get install` is not working then try the follwin
 The `autoclean` command might fix the problem. Sometimes it may only work in a freshly started chroot session. So try restarting it if it fails, or start temporarily a chroot from crosh shell within a chrome browser tab with `sudo enter-chroot`, and then run update/install from there. 
 
 ```sh
-sudo apt-get autoclean # This might fix things
+sudo apt-get clean && sudo apt-get autoclean # This might fix things
 sudo apt-get update # or with && sudo apt-get upgrade
 ```
 

diff --git a/crouton.md b/crouton.md
@@ -164,7 +164,7 @@ croutonversion -u -c # list installed and latest available version
 Then shutdown Ubuntu and run in crosh shell the following command. This will update/upgrade all installed targets.
 
 ```sh
-sudo sh ~/Downloads/crouton -u -n xenial # add -e for encryption
+sudo sh ~/Downloads/crouton -u -n xenial 
 ```
 
 <div id='delete_options'/>

diff --git a/crouton.md b/crouton.md
@@ -245,7 +245,7 @@ sudo apt-get update
 Reinstalling `libcurl3-gnutls` has also been reported to help.
 
 ```sh
-sudo apt-get --reinstall install `libcurl3-gnutls` has also been reported to help.
+sudo apt-get --reinstall install libcurl3-gnutls 
 ```
 
 There are also reports that using more RAM on the Chrome OS side might help. For this just open a few data/process intensive tabs in Chrome. Also check if there are any broken PPAs in `/etc/apt/sources.list.d`.
diff --git a/crouton.md b/crouton.md
@@ -242,5 +242,10 @@ sudo apt-get upgrade
 sudo apt-get update
 ```
 
+Reinstalling `libcurl3-gnutls` has also been reported to help.
+
+```sh
+sudo apt-get --reinstall install `libcurl3-gnutls` has also been reported to help.
+```
 
 There are also reports that using more RAM on the Chrome OS side might help. For this just open a few data/process intensive tabs in Chrome. Also check if there are any broken PPAs in `/etc/apt/sources.list.d`.
diff --git a/crouton.md b/crouton.md
@@ -122,7 +122,7 @@ ls -al /usr/local/chroots/
 
 ## 3. Usage
 
-<div id='start'/>
+<div id='startup'/>
 
 ### i. Start Crouton
 

diff --git a/crouton.md b/crouton.md
@@ -32,6 +32,8 @@
     + [Main Manual](https://github.com/dnschneid/crouton/blob/master/README.md) 
     + [Cheat Sheet](https://github.com/dnschneid/crouton/wiki/Crouton-Command-Cheat-Sheet) 
     + [Tricks](https://github.com/dnschneid/crouton/wiki) 
++ Manuals from Ubuntu site
+    + [Install Ubuntu on Chromebook](https://tutorials.ubuntu.com/tutorial/install-ubuntu-on-chromebook#0)
 + Various simplified install intros: 
     + [Install by Whitson Gordon](https://lifehacker.com/how-to-install-linux-on-a-chromebook-and-unlock-its-ful-509039343)
     + [Install by Chris Hoffman](https://www.howtogeek.com/162120/how-to-install-ubuntu-linux-on-your-chromebook-with-crouton/)

diff --git a/crouton.md b/crouton.md
@@ -57,7 +57,7 @@ Note this will erase all local data. So back things up first. Instructions for e
 
 ### iii. Install Chrome extension
 
-For better integraton with Chrome OS install [Crouton Integraton extension](https://chrome.google.com/webstore/detail/crouton-integration/gcpneefbbnfalgjniomfjknbcgkbijom). It is need to run crouton within a Chrome OS session rather than in parallel.
+For better integraton with Chrome OS install [Crouton Integraton extension](https://chrome.google.com/webstore/detail/crouton-integration/gcpneefbbnfalgjniomfjknbcgkbijom). It is needed to run crouton within a Chrome OS session rather than in parallel.
 
 <div id='crouton_install'/>
 

diff --git a/crouton.md b/crouton.md
@@ -1,6 +1,5 @@
 # Crouton Install and Management
 
-Also see notes in corresponding Google Keep.
 
 * * *
 

diff --git a/crouton.md b/crouton.md
@@ -220,7 +220,7 @@ sudo apt-get update && sudo apt-get install <my_software>
 
 If `apt-get update` and/or `apt-get install` is not working then try the follwing troubleshooting steps. Additional help on this topic can be found [here](https://askubuntu.com/questions/309672/problem-with-sudo-apt-get-upgrade).
 
-The `autoclean` command might fix the problem. Sometimes it may only work in a freshly started chroot session. So try restarting it if it fails, or start temporarily a chroot from crosh shell within chrome browser tab with `sudo enter-chroot`, and then run update/install from there. 
+The `autoclean` command might fix the problem. Sometimes it may only work in a freshly started chroot session. So try restarting it if it fails, or start temporarily a chroot from crosh shell within a chrome browser tab with `sudo enter-chroot`, and then run update/install from there. 
 
 ```sh
 sudo apt-get autoclean # This might fix things

diff --git a/crouton.md b/crouton.md
@@ -29,7 +29,7 @@ Also see notes in corresponding Google Keep.
 <div id='manuals'/>
 
 ## 1. Manuals
-+  Manuals by developer David Schneider on GitHub  
++  Manuals by Crouton developer David Schneider on GitHub  
     + [Main Manual](https://github.com/dnschneid/crouton/blob/master/README.md) 
     + [Cheat Sheet](https://github.com/dnschneid/crouton/wiki/Crouton-Command-Cheat-Sheet) 
     + [Tricks](https://github.com/dnschneid/crouton/wiki) 

diff --git a/crouton.md b/crouton.md
@@ -216,7 +216,7 @@ sudo apt-get update && sudo apt-get install <my_software>
 
 <div id='apt-get_broken'/>
 
-#### Problem with `apt-get`
+#### i. Problem with `apt-get`
 
 If `apt-get update` and/or `apt-get install` is not working then try the follwing troubleshooting steps. Additional help on this topic can be found [here](https://askubuntu.com/questions/309672/problem-with-sudo-apt-get-upgrade).
 

diff --git a/crouton.md b/crouton.md
@@ -22,6 +22,7 @@ Also see notes in corresponding Google Keep.
     6. [Backup Chroot](#backup_chroot)
     7. [Software Installs](#software_installs)
 4. [Troubleshooting](#troubleshooting)
+    1. [Problem with apt-get](#apt-get_broken)
 
 * * *
 
@@ -213,7 +214,9 @@ sudo apt-get update && sudo apt-get install <my_software>
 
 ## 4. Troubleshooting
 
-#### `apt-get` broken
+<div id='apt-get_broken'/>
+
+#### Problem with `apt-get`
 
 If `apt-get update` and/or `apt-get install` is not working then try the follwing troubleshooting steps. Additional help on this topic can be found [here](https://askubuntu.com/questions/309672/problem-with-sudo-apt-get-upgrade).
 

diff --git a/crouton.md b/crouton.md
@@ -224,6 +224,12 @@ sudo apt-get autoclean # This might fix things
 sudo apt-get update # or with && sudo apt-get upgrade
 ```
 
+After running `update` also try this
+
+```sh
+sudo apt-get -f install 
+```
+
 Another reason could be a broken dpkg system. To fix this, run the following commands. 
 
 ```sh 
@@ -232,10 +238,5 @@ sudo apt-get upgrade
 sudo apt-get update
 ```
 
-After running `update` also try this
-
-```sh
-sudo apt-get -f install 
-```
 
 There are also reports that using more RAM on the Chrome OS side might help. For this just open a few data/process intensive tabs in Chrome. Also check if there are any broken PPAs in `/etc/apt/sources.list.d`.
diff --git a/crouton.md b/crouton.md
@@ -1,4 +1,4 @@
-# zzzCrouton Install and Management
+# Crouton Install and Management
 
 Also see notes in corresponding Google Keep.
 

diff --git a/crouton.md b/crouton.md
@@ -1,4 +1,4 @@
-# Crouton Install and Management
+# zzzCrouton Install and Management
 
 Also see notes in corresponding Google Keep.
 

diff --git a/crouton.md b/crouton.md
@@ -215,7 +215,7 @@ sudo apt-get update && sudo apt-get install <my_software>
 
 #### `apt-get` broken
 
-If `apt-get update` and/or `apt-get install` is not working then try the follwing troubleshooting steps.
+If `apt-get update` and/or `apt-get install` is not working then try the follwing troubleshooting steps. Additional help on this topic can be found [here](https://askubuntu.com/questions/309672/problem-with-sudo-apt-get-upgrade).
 
 The `autoclean` command might fix the problem. Sometimes it may only work in a freshly started chroot session. So try restarting it if it fails, or start temporarily a chroot from crosh shell within chrome browser tab with `sudo enter-chroot`, and then run update/install from there. 
 

diff --git a/crouton.md b/crouton.md
@@ -224,6 +224,14 @@ sudo apt-get autoclean # This might fix things
 sudo apt-get update # or with && sudo apt-get upgrade
 ```
 
+Another reason could be a broken dpkg system. To fix this, run the following commands. 
+
+```sh 
+sudo dpkg --configure -a
+sudo apt-get upgrade
+sudo apt-get update
+```
+
 After running `update` also try this
 
 ```sh

diff --git a/crouton.md b/crouton.md
@@ -71,7 +71,7 @@ For better integraton with Chrome OS install [Crouton Integraton extension](http
     shell
     ```
 
-3. Now install crouton for the proper linux release specified under `-r` argument (xenial is the Ubuntu 16.04) along with proper targets. The latter are selected under the `-t` argument. The chroot name can be specified with the `-n` option (default is name of chosen release, e.g. xenial). If the `-e` argument is added then the chroot will be encrypted. 
+3. Now install crouton for the proper linux release specified under `-r` argument (xenial is the Ubuntu 16.04) along with proper targets. The latter are selected under the `-t` argument. The names and other details about Ubuntu releases can be looked up [on this Ubuntu site](https://wiki.ubuntu.com/Releases). The chroot name can be specified with the `-n` option (default is name of chosen release, e.g. xenial). If the `-e` argument is added then the chroot will be encrypted. 
 
     ```sh
     sudo sh ~/Downloads/crouton -r xenial -t x11,chrome,xorg,xiwi,keyboard,touch,unity,xfce -e # These are your most current targets; in the past you used unity,xfce,xiwi,keyboard,touch

diff --git a/crouton.md b/crouton.md
@@ -71,7 +71,7 @@ For better integraton with Chrome OS install [Crouton Integraton extension](http
     shell
     ```
 
-3. Now install crouton for the proper linux release specified under `-r` argument (xenial is the Ubuntu 16.04) along with proper targets. The latter are selected under the `-t` argument. The chroot name can be specified with the `-n` option (default is name is chosen release, e.g. xenial). If the `-e` argument is added then the chroot will be encrypted. 
+3. Now install crouton for the proper linux release specified under `-r` argument (xenial is the Ubuntu 16.04) along with proper targets. The latter are selected under the `-t` argument. The chroot name can be specified with the `-n` option (default is name of chosen release, e.g. xenial). If the `-e` argument is added then the chroot will be encrypted. 
 
     ```sh
     sudo sh ~/Downloads/crouton -r xenial -t x11,chrome,xorg,xiwi,keyboard,touch,unity,xfce -e # These are your most current targets; in the past you used unity,xfce,xiwi,keyboard,touch

diff --git a/crouton.md b/crouton.md
@@ -169,7 +169,7 @@ sudo sh ~/Downloads/crouton -u -n xenial # add -e for encryption
 
 ### v. Delete options
 
-Currently, not easily possible due to complicated interdendencies/histories of packages across targets!!!
+Currently, it is not easily possible to delete targets due to complicated interdendencies/histories of packages across targets!!!
 
 To remove a chroot, one can use the following command(s).
 
@@ -209,6 +209,8 @@ Within a Chroot one should update and install software packages via `apt-get`, s
 sudo apt-get update && sudo apt-get install <my_software>
 ```
 
+<div id='troubleshooting'/>
+
 ## 4. Troubleshooting
 
 #### `apt-get` broken

diff --git a/crouton.md b/crouton.md
@@ -13,10 +13,15 @@ Also see notes in corresponding Google Keep.
     3. [Chrome Extension](#chrome_extension)
     4. [Install Crouton](#crouton_install)
     5. [Useful Helper Commands](#helper_commands)
-    6. [Color Scheme](#colorscheme)
-    7. [Setup in user accounts of UCR's HPCC](#ucrhpcc)
-3. [Usage and configuration](#usage)
-4. [Config files](#configfiles)
+3. [Usage](#usage)
+    1. [Start Crouton](#startup)
+    2. [Switch between Chroot and Chrome OS](#toggle) 
+    3. [Shutdown Chroot](#shutdown)
+    4. [Update Chroot](#update_chroot)
+    5. [Delete Options](#delete_options)
+    6. [Backup Chroot](#backup_chroot)
+    7. [Software Installs](#software_installs)
+4. [Troubleshooting](#troubleshooting)
 
 * * *
 
@@ -106,12 +111,18 @@ Add target to an existing chroot with `-u` option
 sudo sh ~/Downloads/crouton -t xiwi -u -n xenial
 ```
 
-### Location of chroots
+Location of chroots
 ```sh
 ls -al /usr/local/chroots/
 ```
 
-## Run Crouton
+<div id='usage'/>
+
+## 3. Usage
+
+<div id='start'/>
+
+### i. Start Crouton
 
 Run chroot in same Chrome OS session. This requires the Crouton Integraton extension (see above) along with the xiwi target. 
 
@@ -125,16 +136,22 @@ or run in parallel mode
 sudo startxfce4 or startunity # shortcuts for enter-chroot startxfce4
 ```
 
-## Switch between chroot and Chrome OS
+<div id='toggle'/>
+
+### ii. Switch between Chroot and Chrome OS
 
 To switch between chroot and ChromeOS use `Ctrl+Alt+Shift+Back` and `Ctrl+Alt+Shift+Forward`; or `Alt+Tab` when in same session.
 
 
-## Shutdown chroot
+<div id='shutdown'/>
+
+### iii. Shutdown Chroot
 
 To shutdown choot, log out or shut down on the Ubuntu side as usual or issue `Ctrl+c` in crosh tab where you started chroot session.
 
-## Update chroot
+<div id='update_chroot'/>
+
+### iv. Update chroot
 
 Check if there is a newer crouton version, run on Ubuntu side:
 
@@ -148,11 +165,11 @@ Then shutdown Ubuntu and run in crosh shell the following command. This will upd
 sudo sh ~/Downloads/crouton -u -n xenial # add -e for encryption
 ```
 
-## Delete target
+<div id='delete_options'/>
 
-Currently, not easily possible due to complicated interdendencies/histories of packages across targets!!!
+### v. Delete options
 
-## Delete choot 
+Currently, not easily possible due to complicated interdendencies/histories of packages across targets!!!
 
 To remove a chroot, one can use the following command(s).
 
@@ -161,7 +178,9 @@ sudo delete-chroot <my_chroot>
 # sudo edit-chroot -d <my_choot> # Does the same; delete-chroot is just a shortcut 
 ```
 
-## Backup chroot
+<div id='backup_chroot'/>
+
+### vi. Backup chroot
 
 Back up your chroot to a timestamped tarball in the current directory.
 
@@ -180,16 +199,17 @@ If your machine is new or powerwashed, one can use the crouton installer to rest
 sudo sh ~/Downloads/crouton -f mybackup.tar.gz
 ```
 
-## Install software within Chroot
+<div id='software_installs'/>
+
+### vii. Install software within Chroot
 
 Within a Chroot one should update and install software packages via `apt-get`, see example below. Detailed instructions for using `apt-get` are available on Ubuntu's [AptGet/Howto](https://help.ubuntu.com/community/AptGet/Howto). Installing software via Ubuntu's Software manager should be avoided since it creates often problems. The GDebi Package installer seems to work fine as an alternative. 
 
 ```sh
 sudo apt-get update && sudo apt-get install <my_software>
 ```
 
-
-## Troubleshooting
+## 4. Troubleshooting
 
 #### `apt-get` broken
 

diff --git a/crouton.md b/crouton.md
@@ -40,23 +40,23 @@ Also see notes in corresponding Google Keep.
 
 <div id='channel'/>
 
-### (i) Check Chrome OS channel
+### i. Check Chrome OS channel
 What Chrome OS channel is running on a Chromebook is not essentail for the Crouton install. However, it can become important later since things may be less stable if the developer channel is running. The Chrome OS channel can be checked and changed as follows: go to settings under Chrome OS (bottom right corner of main screen) -> select menu in the top left corner -> about Chrome OS -> detailed build information -> change channel. The resulting change channel window shows which channel is currently active. For more details see [here](https://www.androidcentral.com/how-switch-your-chromebook-developer-channel).
 
 <div id='developer_mode'/>
 
-### (ii) Enable developer mode
+### ii. Enable developer mode
 Note this will erase all local data. So back things up first. Instructions for enabling developer mode are [here](https://lifehacker.com/how-to-install-linux-on-a-chromebook-and-unlock-its-ful-509039343), and the details for specific Chromebooks are given [here](https://www.chromium.org/chromium-os/developer-information-for-chrome-os-devices).
 
 <div id='chrome_extension'/>
 
-### (iii) Install Chrome extension
+### iii. Install Chrome extension
 
 For better integraton with Chrome OS install [Crouton Integraton extension](https://chrome.google.com/webstore/detail/crouton-integration/gcpneefbbnfalgjniomfjknbcgkbijom). It is need to run crouton within a Chrome OS session rather than in parallel.
 
 <div id='crouton_install'/>
 
-### (iv) Install Crouton
+### iv. Install Crouton
 
 1. Download latest Crouton release from here [https://goo.gl/fd3zc](https://goo.gl/fd3zc) which comes form developer's repository [here](https://github.com/dnschneid/crouton/blob/master/README.md). For simplicity leave downloaded `crouton` file in Downloads folder.
 
@@ -74,7 +74,19 @@ For better integraton with Chrome OS install [Crouton Integraton extension](http
 
 <div id='helper_commands'/>
 
-### (v) Useful helper commands
+### v. Useful helper commands
+
+Enter chroot from crosh shell
+
+```sh
+sudo enter-chroot
+```
+
+List targets installed in a chroot
+
+```sh
+sudo edit-chroot -al # Execute in Chrome OS after Ctrl+alt+t and then shell
+```
 
 List available linux releases
 
@@ -94,6 +106,11 @@ Add target to an existing chroot with `-u` option
 sudo sh ~/Downloads/crouton -t xiwi -u -n xenial
 ```
 
+### Location of chroots
+```sh
+ls -al /usr/local/chroots/
+```
+
 ## Run Crouton
 
 Run chroot in same Chrome OS session. This requires the Crouton Integraton extension (see above) along with the xiwi target. 
@@ -171,23 +188,6 @@ Within a Chroot one should update and install software packages via `apt-get`, s
 sudo apt-get update && sudo apt-get install <my_software>
 ```
 
-## Additional useful commands
-
-### Enter chroot from crosh shell
-
-```sh
-sudo enter-chroot
-```
-
-### List targets installed in a chroot
-```sh
-sudo edit-chroot -al # Execute in Chrome OS after Ctrl+alt+t and then shell
-```
-
-### Location of chroots
-```sh
-ls -al /usr/local/chroots/
-```
 
 ## Troubleshooting
 

diff --git a/crouton.md b/crouton.md
@@ -22,7 +22,7 @@ Also see notes in corresponding Google Keep.
 
 <div id='manuals'/>
 
-## Manuals
+## 1. Manuals
 +  Manuals by developer David Schneider on GitHub  
     + [Main Manual](https://github.com/dnschneid/crouton/blob/master/README.md) 
     + [Cheat Sheet](https://github.com/dnschneid/crouton/wiki/Crouton-Command-Cheat-Sheet) 
@@ -36,27 +36,27 @@ Also see notes in corresponding Google Keep.
 
 <div id='intallation'/>
 
-## Installation
+## 2. Installation
 
 <div id='channel'/>
 
-### Check Chrome OS channel
+### (i) Check Chrome OS channel
 What Chrome OS channel is running on a Chromebook is not essentail for the Crouton install. However, it can become important later since things may be less stable if the developer channel is running. The Chrome OS channel can be checked and changed as follows: go to settings under Chrome OS (bottom right corner of main screen) -> select menu in the top left corner -> about Chrome OS -> detailed build information -> change channel. The resulting change channel window shows which channel is currently active. For more details see [here](https://www.androidcentral.com/how-switch-your-chromebook-developer-channel).
 
 <div id='developer_mode'/>
 
-### Enable developer mode
+### (ii) Enable developer mode
 Note this will erase all local data. So back things up first. Instructions for enabling developer mode are [here](https://lifehacker.com/how-to-install-linux-on-a-chromebook-and-unlock-its-ful-509039343), and the details for specific Chromebooks are given [here](https://www.chromium.org/chromium-os/developer-information-for-chrome-os-devices).
 
 <div id='chrome_extension'/>
 
-### Install Chrome extension
+### (iii) Install Chrome extension
 
 For better integraton with Chrome OS install [Crouton Integraton extension](https://chrome.google.com/webstore/detail/crouton-integration/gcpneefbbnfalgjniomfjknbcgkbijom). It is need to run crouton within a Chrome OS session rather than in parallel.
 
 <div id='crouton_install'/>
 
-### Install Crouton
+### (iv) Install Crouton
 
 1. Download latest Crouton release from here [https://goo.gl/fd3zc](https://goo.gl/fd3zc) which comes form developer's repository [here](https://github.com/dnschneid/crouton/blob/master/README.md). For simplicity leave downloaded `crouton` file in Downloads folder.
 
@@ -74,7 +74,7 @@ For better integraton with Chrome OS install [Crouton Integraton extension](http
 
 <div id='helper_commands'/>
 
-### Useful helper commands
+### (v) Useful helper commands
 
 List available linux releases
 

diff --git a/crouton.md b/crouton.md
@@ -76,23 +76,23 @@ For better integraton with Chrome OS install [Crouton Integraton extension](http
 
 ### Useful helper commands
 
-    List available linux releases
+List available linux releases
 
-    ```sh
-    sh ~/Downloads/crouton -r list
-    ```
+```sh
+sh ~/Downloads/crouton -r list
+```
 
-    List all available targets
+List all available targets
 
-    ```sh
-    sh ~/Downloads/crouton -t help
-    ```
+```sh
+sh ~/Downloads/crouton -t help
+```
 
-    Add target to an existing chroot with `-u` option
+Add target to an existing chroot with `-u` option
 
-    ```sh
-    sudo sh ~/Downloads/crouton -t xiwi -u -n xenial
-    ```
+```sh
+sudo sh ~/Downloads/crouton -t xiwi -u -n xenial
+```
 
 ## Run Crouton
 

diff --git a/crouton.md b/crouton.md
@@ -2,6 +2,26 @@
 
 Also see notes in corresponding Google Keep.
 
+* * *
+
+## Table of Content
+
+1. [Manuals](#manuals)
+2. [Installation](#intallation)
+    1. [Chrome OS Channel](#channel)
+    2. [Developer Mode](#developer_mode) 
+    3. [Chrome Extension](#chrome_extension)
+    4. [Install Crouton](#crouton_install)
+    5. [Useful Helper Commands](#helper_commands)
+    6. [Color Scheme](#colorscheme)
+    7. [Setup in user accounts of UCR's HPCC](#ucrhpcc)
+3. [Usage and configuration](#usage)
+4. [Config files](#configfiles)
+
+* * *
+
+<div id='manuals'/>
+
 ## Manuals
 +  Manuals by developer David Schneider on GitHub  
     + [Main Manual](https://github.com/dnschneid/crouton/blob/master/README.md) 
@@ -14,18 +34,28 @@ Also see notes in corresponding Google Keep.
     + [Video Tutorial](https://chromeunboxed.com/install-native-apps-on-your-chromebook-with-ubuntu-linux/) by Robby Payne
 + [What to do after install](http://www.webupd8.org/2013/12/things-to-do-after-installing-ubuntu-on.html) by Andrew
 
-## Install
+<div id='intallation'/>
+
+## Installation
+
+<div id='channel'/>
 
 ### Check Chrome OS channel
 What Chrome OS channel is running on a Chromebook is not essentail for the Crouton install. However, it can become important later since things may be less stable if the developer channel is running. The Chrome OS channel can be checked and changed as follows: go to settings under Chrome OS (bottom right corner of main screen) -> select menu in the top left corner -> about Chrome OS -> detailed build information -> change channel. The resulting change channel window shows which channel is currently active. For more details see [here](https://www.androidcentral.com/how-switch-your-chromebook-developer-channel).
 
+<div id='developer_mode'/>
+
 ### Enable developer mode
 Note this will erase all local data. So back things up first. Instructions for enabling developer mode are [here](https://lifehacker.com/how-to-install-linux-on-a-chromebook-and-unlock-its-ful-509039343), and the details for specific Chromebooks are given [here](https://www.chromium.org/chromium-os/developer-information-for-chrome-os-devices).
 
+<div id='chrome_extension'/>
+
 ### Install Chrome extension
 
 For better integraton with Chrome OS install [Crouton Integraton extension](https://chrome.google.com/webstore/detail/crouton-integration/gcpneefbbnfalgjniomfjknbcgkbijom). It is need to run crouton within a Chrome OS session rather than in parallel.
 
+<div id='crouton_install'/>
+
 ### Install Crouton
 
 1. Download latest Crouton release from here [https://goo.gl/fd3zc](https://goo.gl/fd3zc) which comes form developer's repository [here](https://github.com/dnschneid/crouton/blob/master/README.md). For simplicity leave downloaded `crouton` file in Downloads folder.
@@ -42,7 +72,9 @@ For better integraton with Chrome OS install [Crouton Integraton extension](http
     sudo sh ~/Downloads/crouton -r xenial -t x11,chrome,xorg,xiwi,keyboard,touch,unity,xfce -e # These are your most current targets; in the past you used unity,xfce,xiwi,keyboard,touch
     ```
 
-4. Useful helper commands
+<div id='helper_commands'/>
+
+### Useful helper commands
 
     List available linux releases
 

diff --git a/crouton.md b/crouton.md
@@ -163,7 +163,7 @@ ls -al /usr/local/chroots/
 
 If `apt-get update` and/or `apt-get install` is not working then try the follwing troubleshooting steps.
 
-The `autoclean` command might fix the problem. Sometimes it may only work in a freshly started chroot session. So try restarting it if it fails, or start temporarily a chroot from crosh sell within cbrowser tab with `sudo enter-chroot`, and then run update/install from there. 
+The `autoclean` command might fix the problem. Sometimes it may only work in a freshly started chroot session. So try restarting it if it fails, or start temporarily a chroot from crosh shell within chrome browser tab with `sudo enter-chroot`, and then run update/install from there. 
 
 ```sh
 sudo apt-get autoclean # This might fix things