Dev-notes.eu Website Review

This website contains notes & cheatsheets for web development, Linux systems administration, information security and cryptocurrency. When looping with an iterator, the index of the current iteration isn't immediately obvious unless you resort to incrementing a counter. Fortunately it's easy to find the start and end of your loop. provide a way to build a list, dictionary or set from a starting list, dictionary or set whilst altering or filtering elements. There are many ways to collect user input. In this example a user is prompted to make a selection from a numbered list. This sets the int choice variable, which can then be used to control programme flow. Protect your sensitive data - create a LUKS encrypted backup partition for Ubuntu 16.04 Xenial Xerus that is automatically mounted on boot. Access a Bitcoin core wallet in an airgapped environment. Secure management of cold-wallets. Fail2Ban can help protect your Linux server from attack. It's a Python package that monitors log files and dynamically adjusts firewall rules to block malicious IP addresses. This article shows how to configure Fail2Ban so that specified IP addresses are ignored. Ethereum is a decentralized blockchain-based platform that runs smart contracts. Because of the decentralized nature of Ethereum, smart contracts run exactly as programmed - short of an internet apocalypse, there is no possibility of downtime, censorship, fraud or third-party interference. The network is cryptographically secure, decentralized and tamper-proof. Install Bitcoin Core in Ubuntu 16.04 - how to do*nload and verify from bitcoin.org. Enable all Apache virtual host configurations at once. This article provides a useful BASH script that loops through and enables all vhost configs - useful when setting up new development machines or changing servers. When running migrations on Laravel 5.4 and MariaDB you may encounter an error related to the permitted maximum length of keys - 1071 Specified key was too long; max key length is 767 bytes Fortunately, there's an easy fix.