diff --git a/certificates/essentials/details.md b/certificates/essentials/details.md
index 4ae9c3a..eaeefaa 100644
--- a/certificates/essentials/details.md
+++ b/certificates/essentials/details.md
@@ -1,11 +1,11 @@
 # Topic 1: The Linux Community and a Career in Open Source
 
-* ![https://app.pluralsight.com/course-player?clipId=4854c0ef-49cb-40e1-b6c6-e9a8c38c0b9c](pluralsight)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=4854c0ef-49cb-40e1-b6c6-e9a8c38c0b9c)
 
 ## 1.1 Linux Evolution and Popular Operating Systems
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/1/1.1/1.1_01/](LPI lesson 1)
-* ![https://app.pluralsight.com/course-player?clipId=b6ffeb56-2e4f-4584-8259-282bc5f1843f](pluralsight)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/1/1.1/1.1_01/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=b6ffeb56-2e4f-4584-8259-282bc5f1843f)
 
 **Weight:** 2
 
@@ -27,8 +27,8 @@ Android
 
 ## 1.2 Major Open Source Applications
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/1/1.2/1.2_01/](LPI lesson 1)
-* ![https://app.pluralsight.com/course-player?clipId=9efdc7de-99c2-4d5e-8675-70c57f34b70f](pluralsight)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/1/1.2/1.2_01/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=9efdc7de-99c2-4d5e-8675-70c57f34b70f)
 
 **Weight:** 2
 
@@ -51,8 +51,8 @@ dpkg, apt-get, rpm, yum
 
 ## 1.3 Open Source Software and Licensing
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/1/1.3/1.3_01/](LPI lesson 1)
-* ![https://app.pluralsight.com/course-player?clipId=ee9322d3-b49a-43d3-a257-db9f6c19c735](pluralsight)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/1/1.3/1.3_01/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=ee9322d3-b49a-43d3-a257-db9f6c19c735)
 
 **Weight:** 1
 
@@ -73,7 +73,7 @@ Open source business models
 
 ## 1.4 ICT Skills and Working in Linux
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/1/1.4/1.4_01/](LPI lesson 1)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/1/1.4/1.4_01/)
 
 **Weight:** 2
 
@@ -94,14 +94,14 @@ Use of common open source applications in presentations and projects
 
 # Topic 2: Finding Your Way on a Linux System
 
-* ![https://debian-handbook.info/browse/stable/short-remedial-course.html#sect.shell-and-basic-commands](Debian handbook basic commands)
+* ![Debian handbook basic commands](https://debian-handbook.info/browse/stable/short-remedial-course.html#sect.shell-and-basic-commands)
 
 ## 2.1 Command Line Basics
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/2/2.1/2.1_01/](LPI lesson 1)
-* ![https://learning.lpi.org/en/learning-materials/010-160/2/2.1/2.1_02/](LPI lesson 2)
-* ![https://app.pluralsight.com/course-player?clipId=bed83199-d8dd-489a-ab34-3c0b5589059b](pluralsight)
-* ![https://ryanstutorials.net/linuxtutorial/commandline.php](Ryan's tutorials commandline)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/2/2.1/2.1_01/)
+* ![LPI lesson 2](https://learning.lpi.org/en/learning-materials/010-160/2/2.1/2.1_02/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=bed83199-d8dd-489a-ab34-3c0b5589059b)
+* ![Ryan's tutorials commandline](https://ryanstutorials.net/linuxtutorial/commandline.php)
 
 **Weight:** 3
 
@@ -124,10 +124,10 @@ type
 
 ## 2.2 Using the Command Line to Get Help
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/2/2.2/2.2_01/](LPI lesson 1)
-* ![https://app.pluralsight.com/course-player?clipId=2ff984f9-3a6a-41f7-adaa-36147a11dbeb](pluralsight)
-* ![https://ryanstutorials.net/linuxtutorial/manual.php](Ryan's tutorials manpages)
-* ![https://debian-handbook.info/browse/stable/solving-problems.html#sect.documentation-sources](Debian handbook documentation)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/2/2.2/2.2_01/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=2ff984f9-3a6a-41f7-adaa-36147a11dbeb)
+* ![Ryan's tutorials manpages](https://ryanstutorials.net/linuxtutorial/manual.php)
+* ![Debian handbook documentation](https://debian-handbook.info/browse/stable/solving-problems.html#sect.documentation-sources)
 
 **Weight:** 2
 
@@ -147,11 +147,11 @@ locate
 
 ## 2.3 Using Directories and Listing Files
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/2/2.3/2.3_01/](LPI lesson 1)
-* ![https://learning.lpi.org/en/learning-materials/010-160/2/2.3/2.3_02/](LPI lesson 2)
-* ![https://app.pluralsight.com/course-player?clipId=34cc6f20-36f0-46c3-bb98-482ab5b8f824](pluralsight)
-* ![https://ryanstutorials.net/linuxtutorial/navigation.php](Ryan's tutorials navigation)
-* ![https://ryanstutorials.net/linuxtutorial/aboutfiles.php](Ryan's tutorials aboutfiles)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/2/2.3/2.3_01/)
+* ![LPI lesson 2](https://learning.lpi.org/en/learning-materials/010-160/2/2.3/2.3_02/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=34cc6f20-36f0-46c3-bb98-482ab5b8f824)
+* ![Ryan's tutorials navigation](https://ryanstutorials.net/linuxtutorial/navigation.php)
+* ![Ryan's tutorials aboutfiles](https://ryanstutorials.net/linuxtutorial/aboutfiles.php)
 
 **Weight:** 2
 
@@ -171,12 +171,11 @@ cd
 . and ..
 home and ~
  
-
 ## 2.4 Creating, Moving and Deleting Files
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/2/2.4/2.4_01/](LPI lesson 1)
-* ![https://app.pluralsight.com/course-player?clipId=80a46137-3b0c-4b68-810f-06311f6df018](pluralsight)
-* ![https://ryanstutorials.net/linuxtutorial/filemanipulation.php](Ryan's tutorials filemanipulation)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/2/2.4/2.4_01/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=80a46137-3b0c-4b68-810f-06311f6df018)
+* ![Ryan's tutorials filemanipulation](https://ryanstutorials.net/linuxtutorial/filemanipulation.php)
 
 **Weight:** 2
 
@@ -194,12 +193,10 @@ mkdir, rmdir
 
 # Topic 3: The Power of the Command Line
 
-* ![https://app.pluralsight.com/course-player?clipId=abdaab05-e3c3-4f46-b5a4-57d106d8b670](pluralsight)
-
 ## 3.1 Archiving Files on the Command Line
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/3/3.1/3.1_01/](LPI lesson 1)
-* ![https://app.pluralsight.com/course-player?clipId=abdaab05-e3c3-4f46-b5a4-57d106d8b670](pluralsight)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/3/3.1/3.1_01/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=abdaab05-e3c3-4f46-b5a4-57d106d8b670)
 
 **Weight:**  2
 
@@ -219,12 +216,12 @@ zip, unzip
 
 ## 3.2 Searching and Extracting Data from Files
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/3/3.2/3.2_01/](LPI lesson 1)
-* ![https://learning.lpi.org/en/learning-materials/010-160/3/3.2/3.2_02/](LPI lesson 2)
-* ![https://app.pluralsight.com/course-player?clipId=dd1ac618-59e1-4d73-9092-58c4ab3d2379](pluralsight)
-* ![https://ryanstutorials.net/linuxtutorial/filters.php](Ryan's tutorials filters)
-* ![https://ryanstutorials.net/linuxtutorial/grep.php](Ryan's tutorials grep)
-* ![https://ryanstutorials.net/linuxtutorial/piping.php](Ryan's tutorials piping)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/3/3.2/3.2_01/)
+* ![LPI lesson 2](https://learning.lpi.org/en/learning-materials/010-160/3/3.2/3.2_02/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=dd1ac618-59e1-4d73-9092-58c4ab3d2379)
+* ![Ryan's tutorials filters](https://ryanstutorials.net/linuxtutorial/filters.php)
+* ![Ryan's tutorials grep](https://ryanstutorials.net/linuxtutorial/grep.php)
+* ![Ryan's tutorials piping](https://ryanstutorials.net/linuxtutorial/piping.php)
 
 **Weight:** 3
 
@@ -247,15 +244,15 @@ wc
 
 ## 3.3 Turning Commands into a Script
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/3/3.3/3.3_01/](LPI lesson 1)
-* ![https://learning.lpi.org/en/learning-materials/010-160/3/3.3/3.3_02/](LPI lesson 2)
-* ![https://app.pluralsight.com/course-player?clipId=d241975f-00b3-4a14-bc1c-5ef92fed7ca0](pluralsight)
-* ![https://ryanstutorials.net/linuxtutorial/scripting.php](Ryan's tutorials scripting)
-* ![https://ryanstutorials.net/linuxtutorial/vi.php](Ryan's tutorials vi)
-* ![https://danielmiessler.com/study/vim/](Daniel Miessler vim primer)
-* ![https://ryanstutorials.net/bash-scripting-tutorial/bash-script.php](Ryan's tutorials bash script)
-* ![https://ryanstutorials.net/bash-scripting-tutorial/bash-variables.php](Ryan's tutorials bash variables)
-* ![https://ryanstutorials.net/bash-scripting-tutorial/bash-loops.php](Ryan's tutorials loops)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/3/3.3/3.3_01/)
+* ![LPI lesson 2](https://learning.lpi.org/en/learning-materials/010-160/3/3.3/3.3_02/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=d241975f-00b3-4a14-bc1c-5ef92fed7ca0)
+* ![Ryan's tutorials scripting](https://ryanstutorials.net/linuxtutorial/scripting.php)
+* ![Ryan's tutorials vi](https://ryanstutorials.net/linuxtutorial/vi.php)
+* ![Daniel Miessler vim primer](https://danielmiessler.com/study/vim/)
+* ![Ryan's tutorials bash script](https://ryanstutorials.net/bash-scripting-tutorial/bash-script.php)
+* ![Ryan's tutorials bash variables](https://ryanstutorials.net/bash-scripting-tutorial/bash-variables.php)
+* ![Ryan's tutorials loops](https://ryanstutorials.net/bash-scripting-tutorial/bash-loops.php)
 
 **Weight:** 4
 
@@ -279,12 +276,10 @@ Exit status
 
 # Topic 4: The Linux Operating System
 
-* ![https://app.pluralsight.com/course-player?clipId=31d82d8e-1dd3-42e8-b522-2dbd76863e47](pluralsight)
-
 ## 4.1 Choosing an Operating System
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/4/4.1/4.1_01/](LPI lesson 1)
-* ![https://app.pluralsight.com/course-player?clipId=31d82d8e-1dd3-42e8-b522-2dbd76863e47](pluralsight)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/4/4.1/4.1_01/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=31d82d8e-1dd3-42e8-b522-2dbd76863e47)
 
 **Weight:** 1
 
@@ -302,8 +297,8 @@ Maintenance cycles, beta and stable
 
 ## 4.2 Understanding Computer Hardware
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/4/4.2/4.2_01/](LPI lesson 1)
-* ![https://app.pluralsight.com/course-player?clipId=5437f9c7-3afb-414f-9908-83ae3d2afaf9](pluralsight)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/4/4.2/4.2_01/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=5437f9c7-3afb-414f-9908-83ae3d2afaf9)
 
 **Weight:** 2
 
@@ -321,11 +316,11 @@ Drivers
 
 ## 4.3 Where Data is Stored 
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/4/4.3/4.3_01/](LPI lesson 1)
-* ![https://learning.lpi.org/en/learning-materials/010-160/4/4.3/4.3_02/](LPI lesson 2)
-* ![https://app.pluralsight.com/course-player?clipId=1e4a4910-fb24-4d1c-bda5-4ec07dd8cfb8](pluralsight)
-* ![https://ryanstutorials.net/linuxtutorial/processes.php](Ryan's tutorials processes)
-* ![https://debian-handbook.info/browse/stable/sect.filesystem-hierarchy.html](Debian handbook filesystem hierarchy)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/4/4.3/4.3_01/)
+* ![LPI lesson 2](https://learning.lpi.org/en/learning-materials/010-160/4/4.3/4.3_02/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=1e4a4910-fb24-4d1c-bda5-4ec07dd8cfb8)
+* ![Ryan's tutorials processes](https://ryanstutorials.net/linuxtutorial/processes.php)
+* ![Debian handbook filesystem hierarchy](https://debian-handbook.info/browse/stable/sect.filesystem-hierarchy.html)
 
 **Weight:** 3
 
@@ -348,9 +343,9 @@ syslog, dmesg
 
 ## 4.4 Your Computer on the Network
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/4/4.4/4.4_01/](LPI lesson 1)
-* ![https://app.pluralsight.com/course-player?clipId=c5b8d8ba-4680-4fd1-9b27-e426a230e0f7](pluralsight)
-* ![https://debian-handbook.info/browse/stable/sect.network-config.html](Debian handbook network config)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/4/4.4/4.4_01/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=c5b8d8ba-4680-4fd1-9b27-e426a230e0f7)
+* ![Debian handbook network config](https://debian-handbook.info/browse/stable/sect.network-config.html)
 
 **Weight:** 2
 
@@ -373,12 +368,10 @@ host
 
 # Topic 5: Security and File Permissions
 
-* ![https://app.pluralsight.com/course-player?clipId=294772a4-dc99-42b7-991c-a00ac41802d6](pluralsight)
-
 ## 5.1 Basic Security and Identifying User Types
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/5/5.1/5.1_01/](LPI lesson 1)
-* ![https://app.pluralsight.com/course-player?clipId=294772a4-dc99-42b7-991c-a00ac41802d6](pluralsight)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/5/5.1/5.1_01/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=294772a4-dc99-42b7-991c-a00ac41802d6)
 
 **Weight:** 2
 
@@ -397,10 +390,10 @@ sudo, su
 
 ## 5.2 Creating Users and Groups
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/5/5.2/5.2_01/](LPI lesson 1)
-* ![https://app.pluralsight.com/course-player?clipId=061ecee0-6982-4f8a-bc0e-fb90237ef961](pluralsight)
-* ![https://debian-handbook.info/browse/stable/sect.user-group-databases.html](Debian handbook users and groups)
-* ![https://debian-handbook.info/browse/stable/sect.creating-accounts.html](Debian handbook creating accounts)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/5/5.2/5.2_01/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=061ecee0-6982-4f8a-bc0e-fb90237ef961)
+* ![Debian handbook users and groups](https://debian-handbook.info/browse/stable/sect.user-group-databases.html)
+* ![Debian handbook creating accounts](https://debian-handbook.info/browse/stable/sect.creating-accounts.html)
 
 **Weight:** 2
 
@@ -419,10 +412,10 @@ passwd
 
 ## 5.3 Managing File Permissions and Ownership
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/5/5.3/5.3_01/](LPI lesson 1)
-* ![https://app.pluralsight.com/course-player?clipId=050fb3e8-8fce-480a-9de0-b5d2c20003d2](pluralsight)
-* ![https://ryanstutorials.net/linuxtutorial/permissions.php](Ryan's tutorials permissions)
-* ![https://debian-handbook.info/browse/stable/sect.rights-management.html](Debian handbook rights management)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/5/5.3/5.3_01/)
+* ![pluralsight](https://app.pluralsight.com/course-player?clipId=050fb3e8-8fce-480a-9de0-b5d2c20003d2)
+* ![Ryan's tutorials permissions](https://ryanstutorials.net/linuxtutorial/permissions.php)
+* ![Debian handbook rights management](https://debian-handbook.info/browse/stable/sect.rights-management.html)
 
 **Weight:** 2
 
@@ -439,7 +432,7 @@ chmod, chown
 
 ## 5.4 Special Directories and Files
 
-* ![https://learning.lpi.org/en/learning-materials/010-160/5/5.4/5.4_01/](LPI lesson 1)
+* ![LPI lesson 1](https://learning.lpi.org/en/learning-materials/010-160/5/5.4/5.4_01/)
 
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