DOCSP-40655 Update Linux .dep installation instructions (#639)

* DOCSP-40655 Update Linux .dep installation instructions to modern approaches

* DOCSP-40655 Update Linux .dep installation instructions to modern approaches

* DOCSP-40655 Update Linux .dep installation instructions to modern approaches

* DOCSP-40655 copy edits

* empty

* DOCSP-40655 copy edits

* DOCSP-40655 copy edits

* DOCSP-40655 fixing build

* DOCSP-40655 tech edits:

Author: ltran-mdb2

source/install.txt

@@ -161,20 +161,29 @@ To download and install |compass|, select your operating system:
          .. tab:: Debian
             :tabid: debian
 
-            1. Download |compass|
+            1. Download |compass|.
 
                .. code-block:: shell
 
                   wget https://downloads.mongodb.com/compass/mongodb-compass_{+current-version+}_amd64.deb
 
 
-            #. Install |compass|
+            #. Install |compass|.
+
+               .. code-block:: shell
+
+                  sudo apt install ./mongodb-compass_{+current-version+}_amd64.deb
+
+               If your Linux distribution does not support using ``apt`` for
+               installing local ``.deb`` files, run the following lines
+               to install |compass|:
 
                .. code-block:: shell
 
                   sudo dpkg -i mongodb-compass_{+current-version+}_amd64.deb
+                  sudo apt-get install -f # This installs required compass dependencies
 
-            #. Start |compass|
+            #. Start |compass|.
 
                .. code-block:: sh
 
@@ -183,20 +192,20 @@ To download and install |compass|, select your operating system:
          .. tab:: RHEL
             :tabid: rhel
 
-            1. Download |compass|
+            1. Download |compass|.
 
                .. code-block:: shell
 
                   wget https://downloads.mongodb.com/compass/mongodb-compass-{+current-version+}.x86_64.rpm
 
 
-            #. Install |compass|
+            #. Install |compass|.
 
                .. code-block:: shell
 
                   sudo yum install mongodb-compass-{+current-version+}.x86_64.rpm
 
-            #. Start |compass|
+            #. Start |compass|.
 
                .. code-block:: sh