Site map of cromwell-intl.com Linux and Unix Security-oriented (also see the security section below) Linux and Security Blog — Thoughts from Time to Time on Linux, Security, and the Cloud How to break into Linux (and how to prevent this) Analysis of multiple intrusions into a poorly-configured Linux system How to set up and use SSH How to set up encrypted storage on Amazon EC2 How to make sendmail use SSL/TLS whenever possible Linux/Unix Administration Getting Started with Linux Linux/UNIX Command Fundamentals and the File System Linux System Administration — The Core Set of Commands TCP/IP configuration commands for Linux/UNIX, MacOS X, Windows, and Cisco IOS IPv6 on Linux with a Motorola/Arris Surfboard cable modem and Comcast How Linux Boots, Boot Scripts, Run Levels, and Service Control — init, Upstart, and systemd How to Build Binary Packages from Source on Linux Transitioning from RHEL / CentOS 6 to 7 to 8 to 9 How to Migrate a System from Red Hat Enterprise Linux to CentOS Installing CentOS Linux on an Alpha Package Management on Linux and BSD — A Phrase Book for RPM, apt-get/dpkg, and pkg_* How to Build Linux Kernels How to Build Linux Kernels on Alphas How to Create and Use Patch Files for RPM Packages Exploring sysfs and the PCI Buses Exploring the Linux Kernel How to Build OpenBSD Kernels How to Add MP3 Support to Red Hat, CentOS, and Fedora Linux (and other UNIX) /dev/random and hardware random number generators Using External Multi-Terabyte Disks with Linux How to use FTP (essential skill sadly unknown by many) Speeding up file transfer with tar and ssh Display the word count in the Vim statusline Linux performance tuning RAM and disk storage Disk I/O File systems: creation and mounting Ethernet options TCP tuning NFS tuning Application resource utilization measurement Taking meaningful measurements Raspberry Pi Linux and other operating systems on a low-cost 86×54 mm board Wired and Wireless, IPv4 and IPv6, Static and DHCP, WPA2-PSK Security Building an OpenVAS Vulnerability Scanner On the Raspberry Pi Building a Network-Attached Storage Appliance with the Raspberry Pi ADS-B Flight Tracking with a Raspberry Pi and Software-Defined Radio Stick How to run both piaware and fr24feed simultaneously: fr24feed and dump1090 on Linux/x86_64, and piaware on Linux/ARM/Raspberry Pi 1090 MHz Antenna for ADS-B Flight Tracking Error messages Fixing Warning Messages About Font Aliases Having multiple <family> in <alias> isn't supported and may not work as expected Fixing Error Messages About Missing GTK Modules Failed to load module "libcanberra-gtk-module.so": libcanberra-gtk-module.so: cannot open shared object file: No such file or directory Multimedia Building a Media Player with Kodi, Linux, and the Raspberry Pi Fix for: My Microphone Is Not Working Linux on Blu-ray Players Adobe Flash Plugin on Older Non-SSE2 CPUs Fix the Xsane error: Failed to open device, invalid argument Using a Canon PIXMA Multifunction Printer / Scanner with Linux OpenBSD Running OpenBSD on a Dell Inspiron 1000 Laptop Compiling Software on OpenBSD Wireshark OpenCV OpenVAS Rainbow Crack WPA2 / 802.11i Wireless Networking Security on OpenBSD Kerberos, LDAP, Samba, and Active Directory How to build an Active Directory server from Samba running on FreeBSD on a Raspberry Pi Web and Electronic Mail — Firefox, Chrome, Thunderbird and Apache How and why to migrate your e-mail from KDE KMail to Mozilla Thunderbird Change Thunderbird's Default Browser: Firefox vs Chrome Using BitTorrent Magnet Links with Firefox and Chrome Detailed analysis of Apache logs with simple Linux/Unix commands How to visualize Apache logs in color Virtualization Commands for Linux Virtualization: chroot, LXC, Docker, QEMU/KVM, virsh, and XML definitions of virtual machines Networking in VMware: How it works and how to modify it. How run put the QEMU emulator and Linux on a USB device, so you can run Linux within a window on a hosting maching running Linux or BSD or Windows How to install and run Windows within the QEMU emulator on an OpenBSD desktop Software-Defined Networking (SDN) Other Linux and Unix Tips and Tricks Digital Cameras, Linux, and BSD Why I Don't Fear UEFI (Not much. For now, anyway) Reconfigure Your Keyboard and Mouse A few Windows things, if we must How to Multiboot OpenBSD and Windows Installing Office 2007 on Windows XP Fixing the PATH on Windows so you can easily run useful software that you had to add Strange Linux/Unix-related stuff The Gallery of Crash Dump Screens UNIX the Supermodel Strange pictures: UNIX the Fire Extinguisher Strange pictures: Linux the Laundry Detergent The Gospel of Tux Biblical Unix Common Windows error message What might be Windows Vista source code Networking with TCP/IP Networking Fundamentals and Terminology Network and Telecommunication Cables Software-Defined Networking (SDN) TCP/IP Networking in general How IP Routing Works How VLAN (Virtual LAN) Technology Works How NAT (Network Address Translation) Works TCP/IP configuration commands for Linux/UNIX, MacOS X, Windows, and Cisco IOS Quick Overview of Protocol Header Structures Breaking in, initializing, and configuring a Cisco 2000/2500/2600/3000/4000 series router Breaking in, initializing, and configuring Cisco and 3com switches Cisco Catalyst 2900 XL Ethernet switch disassembly and repair What is IPsec? — A simple explanation of IPsec, the network security it provides, and how to set it up on Linux WAN Specifications WLAN Specifications Network Attack Analysis — Classifying and Identifying Attack Patterns With Textual Analysis Tools How to read netstat -a output How to read netstat -s output Computer and Network Security My public key Digitally signed messages and how PGP signs e-mail. Fundamentals Just Enough Cryptography Cryptographic Terminology Symmetric and Asymmetric Ciphers One-Time Pads Cipher Strength and Key Length Cryptographic Hash Functions Brute-Force Search for Unusual Hash Outputs Digital Signatures and Certificates Cultural Use of Cryptography Further Reading Selecting an Encryption Cipher and Mode How To Verify Digital Signatures TCP/IP How NAT (Network Address Translation) Works Information security Confidentiality and Data Integrity Tools Government and Industry Regulations Security problems caused by government-imposed backdoors Availability Tools Computer Forensics How to set up encrypted storage on Amazon EC2 User Authentication Tools User authentication weaknesses and defenses How passwords work and how to break them Reverse-engineering the hacker: What are typical hacker passwords guesses? System security System Security Auditing Tools OS-Specific Security Issues Intrusion Detection Tools Analysis of multiple intrusions into a poorly-configured Linux system Attacks on Virtualization Security Hardware Exploits Physical security Network security Network Security Auditing/Monitoring Tools Network Monitoring / Packet Sniffing Tools SSL/TLS Security Massive Failures of the Internet's Public-Key Infrastructure (PKI) What is IPsec? — A simple explanation of IPsec, the network security it provides, and how to set it up on Linux Firewall Tools World-Wide Web Security QR codes and Near-Field Communication risks TCP/IP Stack Hardening Network Attack Analysis — Classifying and Identifying Attack Patterns With Textual Analysis Tools Cloud Security An Overview of Cloud Security Security Concerns of Cloud Technology Users Hacked in the Cloud — An Attacker Takes Over a Cloud Server Malware, Social Engineering, and Software Security Analyzing a Sustem Hacked by Extortionware or Police Ransomware Why HTML E-mail is Dangerous Analyzing Web Mail Abuse and Spear-Phishing Analyzing a "Phishing" Scam Attempt Learn about scams, spam, phishing, and worse, and take some great Phishing IQ tests Analyzing Hostile Data Gibe-F Worm, also known as the Swen Worm, one of the more interesting pieces of malware I have. Downloader.Tibs.Gen-1 worm Win.Trojan.Upatre Trojan, a.k.a. Staser Bagel worm Mytob worm Mydoom worm Downloader.Small-1109 Trojan Stration.JH Worm Sober.U-3 Worm Trojan.Agent-59561 Trojan.Exchanger.DL Trojan.Downloader Hacking the Human — Bank scam Fighting Internet Hoaxes Software Security Tools Reference material CompTIA Security+ Exam Guidance Security-related RFCs and Mitre Nomenclature Projects Recommended Reference Books — Best practice how-tos, background information, and more Infosec Bulletins General Information Cyberwar Other Organizations' Policies Infosec Response Teams Government Electronic Surveillance Keeping Track of the Bad Guys Textual Analysis Network Attack Analysis — Classifying and Identifying Attack Patterns With Textual Analysis Tools 3-D Data and Image Analysis 3-D Laser Scanning for Biology, Anthropology, and Archaeology 3-D Range Scans of Trilobite Fossils Composite Light-Stripe Images Multi-Viewpoint Data Registration Raytracing Contrast Enhancement through Localized Histogram Equalization How to Scan X-Ray Films Publications Bob Cromwell's publications Basics of Turkish Grammar Introduction Background, list of real reference texts Word order, orthography, vowel classes and variable vowels, HTML codes for Turkish characters Pronouns, nouns, possession, adjectives, adverbs Verbs An attempt at an alphabetical list of Turkish suffixes (really morphotactics) Russian Grammar and Typesetting Russian Grammar Cyrillic in Latex and Postscript and Unicode Greek Grammar INFOSEC History and Military Tourism Belgium — The Battle of the Bulge — Bastogne and the Ardennes Forest France — The D-Day landing beaches and other sites in Normandy Italy — Paestum, south of Salerno, Operation Avalanche: Allied landing of September 1943 Turkey — The Gallipoli Campaign, 1915 UK UK Cabinet War Rooms Bletchley Park WWII and Cold War Military Tunnels in the White Cliffs above Dover Swingate Chain Home Radar Station WWII glider base outside Harwell Scapa Flow and the Churchill Barriers UK WWII Military Communications Gear USA Finding the American Black Chamber in New York Washington DC — Arlington Hall Washington DC — Naval Security Station Herbert Yardley's restaurant in Washington DC National Security Agency museum Historical Electronics Museum (radar and military radio, just outside Baltimore-Washington International Airport) USS Chaumont (AP-5) DL3G — Delta Lima 3 Green — Cold War watch tower Travel Suggestions Athens to Paris by Train Alaska Belgium The Battle of the Bulge — Bastogne and the Ardennes Forest Namur and Dinant — Two Historic Towns in the Northwest Ardennes Art Nouveau Architecture in Brussels Comic Book Art in Brussels Belgian Beers and Brussels Cafes Surreal Statues in Brussels Bulgaria Sofia Veliko Tarnovo By Train through Bulgaria Bulgarian Food and Drink Canada Czech Republic Egypt Cairo Giza Plateau — Pyramids and Sphinx Luxor and the Valley of the Kings Aswan and Abu Simbel Mount Sinai and Dahab Estonia France One week boat trip from Briare to Decize on the Canal Latéral à la Loire Renting a canal boat in France The D-Day landing beaches and other sites in Normandy Budget Hotels in France — Paris, Marseille, Provence, Normandy, Brittany, Languedoc Jim Morrison in Paris Marseille and the Coast Road Art and History along the Seine: Rollo, Richard Lionheart, Erwin Rommel, and Claude Monet Mont-Saint-Michel and Saint-Malo along the Brittany Coast Étretat and Fécamp on the Normandy Coast French School Lunch Menus Detectives in French Fiction and Life Barbégal, Les Baux-de-Provence, and St-Rémy-de-Provence Thomas Jefferson in France Paris and Provence: Montmartre, Arles, Lex Baux-de-Provence Some Americans Don't Realize That They Have Electricity in France Loire River Valley: Fontevraud, Chinon, Amboise, Chenanceau Wash Your Clothes at the Lavomat in France Megaliths Pierre Tourneresse, a Neolithic Passage Grave in Normandy Megaliths in the lower Loire Valley — Saumur and Gennes Dolmen de la Pitchoune — A Megalithic Dolmen structure in Provence Greece Logistics Athens and Cape Sounion The Peloponnese: Corinth and Olympia Meteora Mycenae Tiryns Delphi Thessaloniki Santorini (Thira) Mykonos Ios Delos Paros The other Greek islands: Patmos, Rhodes, Naxos, Samos Greek Food and Drink Greek Ferries and Island Hopping Train Travel in Greece Bus Travel in Greece Roadside Greek Orthodox Shrines Greenland Hungary Italy Atrani and the Amalfitani Coast Ruins in Rome — Pompey's portico and the site of the Senate. Napoli (Naples) Pompeii Nero's Villa Poppaea at Oplontis Paestum, an ancient Greek city in southern Italy, and Salerno. Umbria — Perugia, Assisi, Sorento, Orvieto, and the Umbrian countryside and hill towns Liguria — Cinque Terre — Riomaggiore, Manarola, Vernazza, Monterosso al Mare, Corniglia Travel by trains in Italy Driving in Italy, and the Long-Delayed Italian Traffic Tickets Japan Tokyo Asakusa district Akihabara Shibuya Harajuku, Takeshita Street, and Omotesandō Shinjuku and traditional izakayas Ameya Yokochō market district Ueno Park Yasukuni Shrine Kamakura Nara Osaka Koyasan Kofun, megalithic tombs Learn to pronounce Katakana and Hiragana Shintō and Buddhism Jordan Latvia Lithuania Mexico People's Republic of China (Hong Kong, Guanzhou, Yangshuo) Getting There, and Dealing With The Languages Hong Kong Teaching a Course in Hong Kong, and Visiting Macau Guangzhou, Part 1 — Logistics, Shamian Island and the Pearl River Guangzhou, Part 2 — Qingping Market, Temples, Street Scenes Yangshuo, Guangxi Province Up the Li Jiang, or Li River Poland Romania Bucharest Painted Churches in Bucovina and Gura Humorului Romanian Food and Drink By Train through Romania Driving through the Carpathian Mountains Russia Syria Trinidad Turkey General information İstanbul Aphrodisias Ephesus — the ruined city Ephesus — A walk from Selçuk to Ephesus Ephesus — The Temple of Artemis Ephesus — Maryemana Gallipoli Göreme and Cappadocia Bodrum and the Mausoleum of Halicarnassus Silk Road Hans Hatuşaş Konya Mountain Treks in the Beşparmak Mountains Nemrut Dağı — Mount Nemrut Olimpos and the Chimera Pamukkale, Hieropolis, and Laodicea Turkish food Getting around Turkey on buses Getting around Turkey on trains U.K. London Travel on the London Underground London — Cabinet War Rooms London — Bletchley Park London — Lee Ho Fook's Megaliths and Stone-Age Structures Stonehenge Avebury Hiking along Hadrian's Wall Glastonbury — King Arthur, the Holy Grail and Joseph of Arimathea Oxford C.S. Lewis and J.R.R. Tolkien at Oxford WWII glider base outside Harwell Dover WWII and Cold War Military Tunnels in the White Cliffs Swingate Chain Home Radar Station Scotland and Orkney Fort William area An ascent of Ben Nevis, the highest mountain in Britain The Road to the Isles, over 22 miles (37 km) overland across the high Scottish moors of Lochaber from Corrour Station to Fort William A walk through Glen Nevis and the Water of Nevis Pitlochry — The Bealach Walk and Megaliths Orkney Islands Skara Brae, a Neolithic Village Neolithic Orkney — Maeshowe, the Ring of Brodgar, the Stones of Stenness, etc The West Coast Walk — Along the Cliffs of Orkney's Mainland Coast The Sousterrain — An Underground Pict Dwelling in Orkney Scapa Flow and the Churchill Barriers The Isle of Iona (and Oban, and Mull) The Grit Boxes of Scotland Navigating with the National Grid system and Ordnance Survey maps Places to stay in the U.K. U.S.A. Alaska Baltimore Baltimore — Edgar Allan Poe & Mid-Day at The House of Omnivores Otakon, Camden Yards, and the Bromo-Seltzer Tower National Security Agency museum Historical Electronics Museum (radar and military radio, just outside Baltimore-Washington International Airport) Detroit and its Post-Apocalyptic Architecture Los Angeles — Venice Beach Montgomery, Alabama New York Arrive by air at LaGuardia Airport Skating Manhattan: 15.5 miles from the Bronx to Battery Park on a longboard Touring the Ghostbusters locations in New York McGee's, the model for MacLaren's in How I Met Your Mother Fictional Architecture of Manhattan The Counterfeit Coffee Caper: My encounter with NYPD Looking for the inspiration for Edward Hoppers Nighthawks Andy Warhol's artistic "Factory" Walking to work along the East River, and spectacular views of New York Harbor from the 31st Floor Lower East Side: Rivington Street Lower East Side: Stanton Street St Marks Street across the East Village New York Internet Infrastruction: Sites normally seen only as traceroute hops New York residences of Hunter S Thompson New York homes of Humphrey Bogart Theodore and Franklin Delano Roosevelt's homes in New York Jewish heritage on the Lower East Side Where Barack Obama lived, studied and hung out in Manhattan in the early 1980s Looking for the home of the last Ottoman Sultan The last four full-height enclosed phone booths in Manhattan Edgar Allan Poe's home in the Bronx H.P. Lovecraft's home in Brooklyn and the Nicholas Roerich Museum in Manhattan Finding the American Black Chamber in New York SRO Hotels, Dormitories, and Flophouses on the Bowery The Mudd Club and Cortlandt Alley The many connections between Marvel Comics and Manhattan Leon Trotsky and Other Revolutionaries in New York Philadelphia — Edgar Allan Poe's House and Two Scoldings San Francisco Haight-Ashbury, The Grateful Dead, Jefferson Airplane, and the Summer of Love Dashiell Hammett, Sam Spade, and The Maltese Falcon in San Francisco Outside San Francisco — Muir Woods, Big Sur Washington DC Looking for the National Christmas Tree behind all the security fencing Arlington Hall Naval Security Station Herbert Yardley's restaurant in Washington DC Some goofy Masonic Sights Transport in the U.S.A.: Bus, Train, Car Megalith Travel How to replace the SIM card in your GSM phone and avoid expensive international roaming charges How to repair a backpack Radio stuff HF QRP operation — KC9RG Morse Code A Simple Audio Tone Control Circuit Building your own RF dummy load and power meter Rhombic antennas — Classic designs for UHF & microwave Modifying the Fort Tuthill 80m QRP transceiver to 40m J-Pole antennas (end-fed half-wave Zepps) Small HF antennas — shortened doublet designs for 10.1 and 14 MHz Balanced line impedance and radiated power The Radio Spectrum for Beginners Radio Frequencies — Ham bands and various utilities Powerful Medium-Wave Stations in North America, Central America, and the Caribbean Radio propagation Construction / repair / modification references Repairing a Tektronix 2445A oscilloscope Building your own oscilloscope probes Copper Wire Tables, Toroids, and Transformers How to fabricate circuit boards, transferring the pattern with a laser printer, and mixing up your own etching solution Modifying an Icom IC2-SAT transceiver for wide frequency coverage, Part 1 Modifying an Icom IC2-SAT transceiver for wide frequency coverage, Part 2 Modifying an Icom IC-229 transceiver for wide frequency coverage Modifications for the Icom IC-3220 VHF/UHF transceiver Internet "Radio" ADS-B Flight Tracking with a Raspberry Pi and Software-Defined Radio Stick Various Technical Topics Multimedia File Tricks: How to Convert PAL DVDs to NTSC, Create and BurnDVDs, and do Other Video Conversions How to copy DVDs, even those with CSS encryption and copy protection, using free software and free operating systems How to Download Videos from YouTube and convert them to XviD and DivX How to Convert Audio Files from WMA or FLAC to MP3 How to Extract MP3 Audio from a Video File How to Rotate Digital Camera Movies by 90° and Convert Them to DVD Some Vaguely Steampunk Projects How to Interface a Soviet Багта-50 1955 rotary-dial telephone with the mobile network and VoIP A Fully Metered Power Controller and Lamp A Light Fixture with an Early 20th Century Esthetic How to Control a Stereo with a 250-volt 100-amp Double-Pole Knife Switch How to fabricate circuit boards, transferring the pattern with a laser printer, and mixing up your own etching solution Computer and audio/video hardware: Install your own DSL line Change the printer "Ready" message to whatever you want HDMI cables and their connector pinouts SVGA cables and their connector pinouts EIDE / PATA / SATA / USB / Floppy cable pinouts The Samsung Galaxy S2 smartphone How to Fix the "Insufficient Storage Available" problem on Android and CyanogenMod How to use Linux utilities to move all your data and apps to a new, larger flash memory card CyanogenMod has been discontinued How to install CyanogenMod on the Samsung Galaxy S2 How to set custom ringtones, alarms and notification sounds on a Samsung Galaxy S2 SIM unlocking the Samsung Galaxy S2 How to take a screenshot on the Samsung Galaxy S2 How to connect the Samsung Galaxy S2 to Linux or OpenBSD Block telemarketing calls on CyanogenMod using the phone blacklist How to access the Samsung Galaxy's secret test menu HTML and Web Authoring: HTML Tools Convert HTML 4 and XHTML pages to HTML 5 Browser and Display Greyscale Test Page Specify Colors in HTML How to do Search Engine Optimization How To Use Google Adsense Within XML/XHTML Other Electrical and Electronic Topics: PC BIOS / POST Error Codes Motorola DCT 2000 Set-Top Box Diagnostics Attempting to Recover Data from QuickDisk Media How To Recover A Digital Camera That Has Been Submerged In Liquid Measuring AC Power Usage Nonsense Toilets of the World Teaching horror stories — No such thing as a stupid question? Hah! Bizarrely irrelevant requests for quotes and bids that I have received, and the nonsense I submitted. Simu Construction Company, Ltd and the Zambian Lavatories Ittehad Chemicals Ltd and OPERATION PAKISTANI BALLDROP, PART ONE Ittehad Chemicals Ltd and OPERATION PAKISTANI BALLDROP, PART TWO Atlantic Gulf & Pacific Company of Manila and OPERATION MANILA BOOKLIFT Jackson Millers Veterinary and THE TONGAN MISDIRECTION Metito Overseas Ltd and THE BAHRAIN EXCAVATION Seman Peru and THE SVERDLOVSK GAMBIT Hadabs Ventures Limited and OPERATION MARLOW-WILLARD Thinking of going to college? My recommendations on the type of school to attend, and what to avoid If Occupy Wall Street Really is The 99%, Then What Does That Make Us? Dreadlocked white drummers, to a surprising extent West Slayter Hill Tailgate Association The Gallery of Crash Dump Screens Signs That Make No Sense Everything You Need to Know About Oliver Cromwell — Free Download for Term Papers and School Reports Crom-Fu, a mixed martial art fighting technique invented by Oliver Cromwell What is Rick Mount's Problem With Purdue? Brilliant movie concepts overlooked by Hollywood — "The Odyssey" and "Iliad" as remakes of "Gilligan's Island", "Battlestar Potemkin", "Show White and the Magnificent Seven Dwarves", Jane Austen as a spy-assassin, and worse. Some Thoughts About Writing Technical Material: In no particular order, as they occur.... The Fingerbox — the history and technology of this device. Sarah Palin baby name and advice generator Alternative History of the Beatles If Sigmund Freud had written The Cat in the Hat A Comparison of Various News Sources (Statistical analysis showing that Fox "News" is as worthless as Pravda) Useful Latin Phrases Guaranteed Super Lucky Numbers How Everything Connects Through Movies Networking Haikus Cryptographic Haikus The Theology of Santa Claus How to Brew Your Own Beer and Mead Mead background How to brew mead How to brew beer Brewing in ancient history Belgian Beers and Brussels Cafes