os: install sudo & add user to sudo group

resolve: #26

Author: practicalli-johnny

CHANGELOG.md

@@ -16,6 +16,7 @@
 - practices: asking questions
 - linux: link to sudo setup page on Debian Linux wiki
 - dev: add scheduled stale issue & pull request check (monthly)
+- os: install sudo & add user to sudo group
 
 ### Changed
 

docs/os/debian-linux.md

@@ -49,6 +49,17 @@ su -
 ??? INFO "Install & Configure sudo for Debian Linux"
     The [sudo page on the Debian Wiki](https://wiki.debian.org/sudo) describes how to install `sudo`, should that approach be acceptable.
 
+    Install sudo package, using root account
+
+    ```shell
+    apt install sudo
+    ```
+
+    Add account-name to `sudo` group, using root account
+
+    ```shell
+    adduser account-name sudo
+    ```
 
 ## Set XDG freedesktop locations