Notes, fixes and guides.
Sixteen years of working notes — Linux and networking, Django and Laravel deployment, SwiftUI, AWS. Written down mostly so I can find them again.
How to upgrade Ubuntu server 20.04 to Ubuntu 22.04 (latest)
1. Let's fetch the latest version of the package list from the repositories. 20301989636aa663ca0e776_000000 2. Upgrade the installed packages. 20301989636aa663ca0e776_000001 3. Upgrade the…
How to Convert a Apple Certificate .p12 file to a PEM File
To convert PKCS#p12 file to a PEM file, use: 20301989636aa663ca0e776_000007 Now you will have both the certificate and key in the cert.pem file without a password. If you…
Python: Add Two or More Numbers – Linked List
Learn how to add two non-negative integers represented by linked lists in reverse order. Check out this Python code example.
Python: Two Sum Problem
Learn how to find indices of two numbers in an array that add up to a specific target using Python. Check out this code and examples.
Python: Stack with Push, Pop and seek Minimum Value with O(1)
Learn how to implement a stack with push, pop, and seekMin functions in Python 3 with a time complexity of O(1). Check out this code!
Python: Lowest Common Ancestor of a Binary Tree – Non Recursive
Python 3 code to find the Lowest Common Ancestor of a Binary Tree This is a Non Recursive solution using DFS method. 20301989636aa663ca0e776_000015 20301989636aa663ca0e776_000016 Hope it helps.
Python: Lowest Common Ancestor of a Binary Search Tree
Python 3 code to find the Lowest Common Ancestor of a Binary Search Tree 20301989636aa663ca0e776_000017 Hope it helps.
Python: Array/List Rotation – Right
Python program to rotate an array towards its right Inplace Method 20301989636aa663ca0e776_000018 Split and Merge Method 20301989636aa663ca0e776_000019 Hope this helps.
Python: Array/List Rotation – Left
Python program to rotate an array towards its left Inplace Method 20301989636aa663ca0e776_000020 Split and Merge Method 20301989636aa663ca0e776_000021 Hope this helps.
PHP Error:0607A082:digital envelope routines:EVP_CI PHER_CTX_set_key_length:invalid key length
If you are trying to use an older version of PHP to connect MYSQL over SSL, there is a good chance that you encounter the following errors: error:0607A082:digital…
HubSpot Cookie Consent – Control the use of non-HubSpot cookies on your website
The HubSpot Cookie Consent banner sets a cookie name '__hs_opt_out' when you accept/decline the cookie consent. You can make use of the status of the consent to remove/allow…
HubSpot – Show the Privacy Cookie Consent Banner above the Body instead of an Overlay
When you enable the Cookie Policy in HubSpot you only have two options, either to show it as a top banner or as a bottom banner. The top…