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--- ansible:ansible_sandbox [2025/02/21 16:51]
manu
+++ ansible:ansible_sandbox [2025/05/28 10:28] (current)
manu [Test 4 insertafter using bash]
@@ Line 136: / Line 136: @@
 mail_pw: PASSWORD_HERE #password for the mail_from mail address
 mail_port: 587 #the port where mails are sent to the mail server, e.g. 587
+</code>
+cat group_vars/all.yml
+<code>
+---
+# general settings
+default_username: debian
+dot_forward_email: <YOUR_EMAIL_GOES_HERE>
+private_key: .ssh/id_rsa
+public_key: .ssh/id_rsa.pub
+ntpserver: pool.ntp.org
+timezone: Europe/Rome
+# default sshd port
+sshd_port: 22
+# generate random passwords for default user and root user
+default_password: "{{lookup('password', '/dev/null length=15 chars=ascii_letters,digits,punctuation')}}"
+root_password: "{{lookup('password', '/dev/null length=15 chars=ascii_letters,digits,punctuation')}}"
+# unattended packages install configuration
+unattended_mail: "{{dot_forward_email}}"
+unattended_remove_unused_dependencies: true
+unattended_automatic_reboot_time: "03:00"
+unattended_update_days: "Sat"
+unattended_clean_interval: 7
+# fail2ban
+fail2ban_loglevel: INFO
+fail2ban_services:
+  - name: ssh
+    port: ssh
+    filter: sshd
+    logpath: /var/log/auth.log
 </code>
@@ Line 259: / Line 293: @@
     - nmap-ncat
 </code>
+===== Test 3 backup file =====
+File is backuped with format **2025-02-23T14:30:00Z**
+<cli prompt='#'>
+---
+- name: Backup file if it exists
+  hosts: localhost
+  tasks:
+    - name: Check if the file exists
+      stat:
+        path: /path/to/your/file
+      register: file_stat
+    - name: Create a backup if the file exists
+      copy:
+        src: /path/to/your/file
+        dest: "/path/to/backup/file_{{ ansible_date_time.iso8601 }}.bak"
+        remote_src: yes
+      when: file_stat.stat.exists
+</cli>
+Backup only if modified
+<cli prompt='#'>
+---
+- name: Backup file if it is different
+  hosts: localhost
+  tasks:
+    - name: Get the checksum of the current file
+      stat:
+        path: /path/to/your/file
+      register: file_stat
+    - name: Get the checksum of the last backup (if exists)
+      stat:
+        path: "/path/to/backup/file_last.bak"
+      register: backup_stat
+      ignore_errors: yes
+    - name: Compare the current file checksum with the backup checksum
+      command: "sha256sum /path/to/your/file | awk '{ print $1 }'"
+      register: current_checksum
+      when: file_stat.stat.exists
+    - name: Compare the backup checksum (if backup exists)
+      command: "sha256sum /path/to/backup/file_last.bak | awk '{ print $1 }'"
+      register: backup_checksum
+      when: backup_stat.stat.exists
+    - name: Backup the file if checksums are different
+      copy:
+        src: /path/to/your/file
+        dest: "/path/to/backup/file_{{ ansible_date_time.iso8601 }}.bak"
+        remote_src: yes
+      when:
+        - file_stat.stat.exists
+        - (backup_stat.stat.exists == false or current_checksum.stdout != backup_checksum.stdout)
+</cli>
+===== Test 4 insertafter using bash =====
+<cli>
+---
+- name: Insert line after pattern using bash
+  hosts: all
+  become: true
+  tasks:
+    - name: Insert line after pattern using sed
+      shell: |
+        if ! grep -q '^new_config_line=value$' /etc/example.conf; then
+          sed -i '/# INSERT HERE/a new_config_line=value' /etc/example.conf
+        fi
+      args:
+        executable: /bin/bash
+</cli>
+https://stackoverflow.com/questions/70162334/in-ansible-how-do-i-add-a-line-without-delete-comment
+https://www.theunixschool.com/2012/06/insert-line-before-or-after-pattern.html

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