AnsiblePlaybooksEnabling color prompt

Enabling color prompt

The default color of the Ubuntu Bash prompt is a light shade of gray. This playbook enables color prompts.

Creating the playbook

Executed:

aadmin@uvm0:~/code/it-wiz/devops/ansible/projects/playbooks$ touch enable_color_prompt.yml

Brought enable_color_prompt.yml to the following form:

- name: Update .bashrc for all human users and root and in /etc/skel/.bashrc
  hosts: all
  tasks:
    - name: Get list of human users
      ansible.builtin.shell: |
        getent passwd | awk -F: '$3 >= 1000 && $3 != 65534 {print $1}'
      register: human_users
      changed_when: false

    - name: Update .bashrc for human users
      ansible.builtin.lineinfile:
        path: "/home/{{ item }}/.bashrc"
        regexp: '^#force_color_prompt=yes'
        line: 'force_color_prompt=yes'
      loop: "{{ human_users.stdout_lines }}"
      no_log: true

    - name: Update .bashrc for root
      ansible.builtin.lineinfile:
        path: "/root/.bashrc"
        regexp: '^#force_color_prompt=yes'
        line: 'force_color_prompt=yes'

    - name: Update /etc/skel/.bashrc
      ansible.builtin.lineinfile:
        path: "/etc/skel/.bashrc"
        regexp: '^#force_color_prompt=yes'
        line: 'force_color_prompt=yes'

Intended result

In each .bashrc file #force_color_prompt=yes string should get replaced by force_color_prompt=yes.

Explanations

The first task registers all the names of the users with UIDs starting with 1000, while skipping the nobody (having the UID of 65534). The no_log: true instruction obfuscates the names of the human users and can be skipped, if the names should be visible.

First execution of the playbook

Executed:

aadmin@uvm0:~/code/it-wiz/devops/ansible/projects$ ansible-playbook playbooks/enable_color_prompt.yml --ask-vault-password

Details

    aadmin@uvm0:~/code/it-wiz/devops/ansible/projects$ ansible-playbook playbooks/enable_color_prompt.yml --ask-vault-password
    Vault password:
 
    PLAY [Modify .bashrc for all human users and root and in /etc/skel/.bashrc] **************************************
 
    TASK [Gathering Facts] *******************************************************************************************
    ok: [uvm27]
    ok: [uvm26]
 
    TASK [Get list of human users] ***********************************************************************************
    ok: [uvm26]
    ok: [uvm27]
 
    TASK [Modify .bashrc for human users] ****************************************************************************
    changed: [uvm26] => (item=None)
    changed: [uvm27] => (item=None)
    changed: [uvm26] => (item=None)
    changed: [uvm26]
    changed: [uvm27] => (item=None)
    changed: [uvm27]
 
    TASK [Modify .bashrc for root] ***********************************************************************************
    changed: [uvm26]
    changed: [uvm27]
 
    TASK [Modify /etc/skel/.bashrc] **********************************************************************************
    changed: [uvm26]
    changed: [uvm27]
 
    PLAY RECAP *******************************************************************************************************
    uvm26                      : ok=5    changed=3    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0
    uvm27                      : ok=5    changed=3    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

Result

All user prompts for exising users became colored.

In particular, the color of the prompt turned green both in PuTTY and in the VMware Remote Console.

PuTTY

Color prompt in PuTTY

VRMC

Color prompt in VRMC

Prompts for new users should also become colored.

Subsequent execution of the playbook

Executed:

aadmin@uvm0:~/code/it-wiz/devops/ansible/projects$ ansible-playbook playbooks/enable_color_prompt.yml --ask-vault-password

Details

    aadmin@uvm0:~/code/it-wiz/devops/ansible/projects$ ansible-playbook playbooks/enable_color_prompt.yml --ask-vault-password
    Vault password:
 
    PLAY [Modify .bashrc for all human users and root and in /etc/skel/.bashrc] **************************************
 
    TASK [Gathering Facts] *******************************************************************************************
    ok: [uvm27]
    ok: [uvm26]
 
    TASK [Get list of human users] ***********************************************************************************
    ok: [uvm26]
    ok: [uvm27]
 
    TASK [Modify .bashrc for human users] ****************************************************************************
    ok: [uvm26] => (item=None)
    ok: [uvm27] => (item=None)
    ok: [uvm26] => (item=None)
    ok: [uvm26]
    ok: [uvm27] => (item=None)
    ok: [uvm27]
 
    TASK [Modify .bashrc for root] ***********************************************************************************
    ok: [uvm26]
    ok: [uvm27]
 
    TASK [Modify /etc/skel/.bashrc] **********************************************************************************
    ok: [uvm26]
    ok: [uvm27]
 
    PLAY RECAP *******************************************************************************************************
    uvm26                      : ok=5    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0
    uvm27                      : ok=5    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

Result

No changes were made.

Setting the time zoneShutting down hosts