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--- helpful_ubuntu_commands [2025/12/06 10:01] – mike
+++ helpful_ubuntu_commands [2026/04/08 08:26] (current) – mike
@@ Line 1: / Line 1: @@
 ====== Helpful Ubuntu/Linux Commands and Procedures ======
-----
 === Disable Ubuntu Pro "Ads", Etc. ===
 <color red>First implemented in my network 03/20/2025; monitoring for effectiveness</color>
@@ Line 76: / Line 76: @@
 === Generate password hashes (useful for Ansible playbooks amongst other things) ===
   mkpasswd --method=sha-512
+==== Extracting encrypted/password protected .ZIP files ====
+.zip files that have been encrypted with AES-256 cannot be extracted via the default 'unzip' program that the distro installs.  Instead, one must install **7zip**.  Perform the following steps:
+  apt update
+  apt install 7zip
+Once installed, use the **7zz** command to extract the file (you will be prompted for the password used to initially encrypt the archive if one was used):
+zz x <filename>
 ==== Cookbook for passing client IP address to systems behind a reverse proxy ====
 === On the reverse proxy: ===
@@ Line 105: / Line 113: @@
 Then proceed to format the new drive, i.e. **mkfs -t ext4 /dev/sdb1**
-==== Changing the server's IP address ====
+==== Updating Network Settings ====
+=== Changing the server's IP address ===
   sudo vi /etc/netplan/00-installer-config.yaml
   find the existing IP and change it to the desired IP; 'wq' out of the file
   sudo netplan apply
-==== Changing the server's host name ====
+=== Changing the server's host name ===
   hostnamectl set-hostname [new host name]
+=== Changing the server's DNS settings ===
+Edit the **/etc/netplan/50-cloud-init.yaml** file appropriately (file name may vary)\\
+Apply the changes with the **sudo netplan apply** command