diff --git a/meta/main.yml b/meta/main.yml
index 329e393..12111ff 100644
--- a/meta/main.yml
+++ b/meta/main.yml
@@ -17,6 +17,7 @@ galaxy_info:
     - name: EL
       versions:
         - 7
+        - 8
     - name: Debian
       versions:
         - stretch
diff --git a/tasks/Darwin.yml b/tasks/Darwin.yml
index b870459..c746b4c 100644
--- a/tasks/Darwin.yml
+++ b/tasks/Darwin.yml
@@ -89,17 +89,21 @@
 
 - name: Add deployment group tags
   set_fact:
-    deployment_agent_cmd_args: "{{ deployment_agent_cmd_args }} +
-      ['--addDeploymentGroupTags', '--deploymentGroupTags \\'{{ az_devops_deployment_group_tags }}\\'']"
+    deployment_agent_cmd_args: "{{ deployment_agent_cmd_args + ['--addDeploymentGroupTags', '--deploymentGroupTags', az_devops_deployment_group_tags'] }}"
   when:
-    - az_devops_deployment_group_tags is defined
+    - az_devops_deployment_group_tags is defined and az_devops_deployment_group_tags != None
 
-- name: Set proxy
+- name: Set proxy url
   set_fact:
-    agent_cmd_args: "{{ agent_cmd_args }} + ['--proxyurl \\'{{ az_devops_proxy_url }}\\'',
-      '--proxyusername \\'{{ az_devops_proxy_username }}\\'', '--proxypassword \\'{{ az_devops_proxy_password }}\\'']"
+    agent_cmd_args: "{{ agent_cmd_args + ['--proxyurl', az_devops_proxy_url] }}"
   when:
-    - az_devops_proxy_url is defined
+    - az_devops_proxy_url is defined and az_devops_proxy_url != None
+
+- name: Set proxy username and password
+  set_fact:
+    agent_cmd_args: "{{ agent_cmd_args + ['--proxyusername', az_devops_proxy_username, '--proxypassword', az_devops_proxy_password] }}"
+  when:
+    - az_devops_proxy_url is defined and az_devops_proxy_url != None and az_devops_proxy_username != None and az_devops_proxy_password != None
 
 - name: Uninstall agent service
   command: ./svc.sh uninstall
@@ -125,9 +129,9 @@
 
 - name: Add '--replace' configuration argument
   set_fact:
-    build_agent_cmd_args: "{{ build_agent_cmd_args }} + ['--replace']"
-    deployment_agent_cmd_args: "{{ build_agent_cmd_args }} + ['--replace']"
-    resource_agent_cmd_args: "{{ resource_agent_cmd_args }} + ['--replace']"
+    build_agent_cmd_args: "{{ build_agent_cmd_args + ['--replace'] }}"
+    deployment_agent_cmd_args: "{{ build_agent_cmd_args + ['--replace'] }}"
+    resource_agent_cmd_args: "{{ resource_agent_cmd_args + ['--replace'] }}"
   when:
     - az_devops_agent_replace_existing
 
diff --git a/tasks/Linux.yml b/tasks/Linux.yml
index ae60468..4e83600 100644
--- a/tasks/Linux.yml
+++ b/tasks/Linux.yml
@@ -1,3 +1,8 @@
+- name: Create group {{ az_devops_agent_group }}
+  group:
+    name: "{{ az_devops_agent_group }}"
+    state: present
+
 - name: Add an agent user
   user:
     name: "{{ az_devops_agent_user }}"
@@ -94,20 +99,30 @@
 
 - name: Add deployment group tags
   set_fact:
-    deployment_agent_cmd_args: "{{ deployment_agent_cmd_args }} +
-      ['--addDeploymentGroupTags', '--deploymentGroupTags \\'{{ az_devops_deployment_group_tags }}\\'']"
+    deployment_agent_cmd_args: "{{ deployment_agent_cmd_args + ['--addDeploymentGroupTags', '--deploymentGroupTags', az_devops_deployment_group_tags ] }}"
+  when:
+    - az_devops_deployment_group_tags is defined and az_devops_deployment_group_tags != None
+
+- name: Set proxy url
+  set_fact:
+    agent_cmd_args: "{{ agent_cmd_args + ['--proxyurl',  az_devops_proxy_url] }}"
   when:
-    - az_devops_deployment_group_tags is defined
+    - az_devops_proxy_url is defined and az_devops_proxy_url != None
 
-- name: Set proxy
+- name: Set proxy user and password
   set_fact:
-    agent_cmd_args: "{{ agent_cmd_args }} + ['--proxyurl \\'{{ az_devops_proxy_url }}\\'', '--proxyusername \\'{{ az_devops_proxy_username }}\\'', '--proxypassword \\'{{ az_devops_proxy_password }}\\'']"
+    agent_cmd_args: "{{ agent_cmd_args + ['--proxyusername', az_devops_proxy_username, '--proxypassword', az_devops_proxy_password ] }}"
   when:
-    - az_devops_proxy_url is defined
+    - az_devops_proxy_url is defined and az_devops_proxy_url != None and az_devops_proxy_username != None and az_devops_proxy_password != None
+
+- name: Download {{ az_devops_agent_package_url }}
+  get_url:
+    url: "{{ az_devops_agent_package_url }}"
+    dest: "/tmp/az_devops_agent_package.tar.gz"
 
-- name: Download and unarchive
+- name: Unarchive /tmp/az_devops_agent_package.tar.gz
   unarchive:
-    src: "{{ az_devops_agent_package_url }}"
+    src: "/tmp/az_devops_agent_package.tar.gz"
     dest: "{{ az_devops_agent_folder }}"
     remote_src: yes
     owner: "{{ az_devops_agent_user }}"
@@ -139,9 +154,9 @@
 
 - name: Add '--replace' configuration argument
   set_fact:
-    build_agent_cmd_args: "{{ build_agent_cmd_args }} + ['--replace']"
-    deployment_agent_cmd_args: "{{ build_agent_cmd_args }} + ['--replace']"
-    resource_agent_cmd_args: "{{ resource_agent_cmd_args }} + ['--replace']"
+    build_agent_cmd_args: "{{ build_agent_cmd_args + ['--replace'] }}"
+    deployment_agent_cmd_args: "{{ build_agent_cmd_args + ['--replace'] }}"
+    resource_agent_cmd_args: "{{ resource_agent_cmd_args + ['--replace'] }}"
   when:
     - az_devops_agent_replace_existing
 
diff --git a/tasks/Windows.yml b/tasks/Windows.yml
index ceaedaa..08d27bc 100644
--- a/tasks/Windows.yml
+++ b/tasks/Windows.yml
@@ -7,7 +7,7 @@
   become: yes
   when:
     - az_devops_agent_create_local_user
-    
+
 - name: Ensure chocolatey is present
   win_chocolatey:
     name: chocolatey
@@ -42,49 +42,49 @@
 
 - name: Add '/Replace' configuration argument
   set_fact:
-    common_install_options: "{{ common_install_options }} + ['/Replace']"
+    common_install_options: "{{ common_install_options + ['/Replace'] }}"
   when:
     - az_devops_agent_replace_existing
 
 - name: Add deployment group tags
   set_fact:
-    deployment_install_options: "{{ deployment_install_options }} + ['/DeploymentGroupTags:{{ az_devops_deployment_group_tags }}']"
+    deployment_install_options: "{{ deployment_install_options + ['/DeploymentGroupTags:{{ az_devops_deployment_group_tags }}'] }}"
   when:
-    - az_devops_deployment_group_tags is defined
+    - az_devops_deployment_group_tags is defined and az_devops_deployment_group_tags != None
 
 - name: Add az_devops_proxy_url
   set_fact:
-    common_install_options: "{{ common_install_options }} + ['/ProxyUrl:{{ az_devops_proxy_url }}']"
+    common_install_options: "{{ common_install_options + ['/ProxyUrl:{{ az_devops_proxy_url }}'] }}"
   when:
-    - az_devops_proxy_url is defined and az_devops_proxy_url
+    - az_devops_proxy_url is defined and az_devops_proxy_url != None
 
 - name: Add az_devops_proxy_username
   set_fact:
-    common_install_options: "{{ common_install_options }} + ['/ProxyUserName:{{ az_devops_proxy_username }}']"
+    common_install_options: "{{ common_install_options + ['/ProxyUserName:{{ az_devops_proxy_username }}'] }}"
   when:
-    - az_devops_proxy_username is defined and az_devops_proxy_username
+    - az_devops_proxy_username is defined and az_devops_proxy_username != None
 
 - name: Add az_devops_proxy_password
   set_fact:
-    common_install_options: "{{ common_install_options }} + ['/ProxyPassword:{{ az_devops_proxy_password }}']"
+    common_install_options: "{{ common_install_options + ['/ProxyPassword:{{ az_devops_proxy_password }}'] }}"
   when:
-    - az_devops_proxy_password is defined and az_devops_proxy_password
+    - az_devops_proxy_password is defined and az_devops_proxy_password != None
 
 - name: Configure agent as a build server
   set_fact:
-    az_devops_agent_package_params: "{{ common_install_options }} + {{ build_agent_install_options }}"
+    az_devops_agent_package_params: "{{ common_install_options + build_agent_install_options }}"
   when:
      - az_devops_agent_role == 'build'
 
 - name: Configure agent as a deployment server
   set_fact:
-    az_devops_agent_package_params: "{{ common_install_options }} + {{ deployment_install_options }}"
+    az_devops_agent_package_params: "{{ common_install_options + deployment_install_options }}"
   when:
      - az_devops_agent_role == 'deployment'
 
 - name: Configure agent as an environment resource
   set_fact:
-    az_devops_agent_package_params: "{{ common_install_options }} + {{ resource_agent_install_options }}"
+    az_devops_agent_package_params: "{{ common_install_options + resource_agent_install_options }}"
   when:
      - az_devops_agent_role == 'resource'
 
diff --git a/vars/dependencies-RedHat-8.yml b/vars/dependencies-RedHat-8.yml
new file mode 100644
index 0000000..c67dc58
--- /dev/null
+++ b/vars/dependencies-RedHat-8.yml
@@ -0,0 +1,8 @@
+az_devops_agent_dependencies:
+  - krb5-libs
+  - libicu
+  - lttng-ust
+  - openssl-libs
+  - zlib
+    # mine only found the script install libicu lttng-ust userspace-rcu
+  - userspace-rcu