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Dell Vostro 3750 Getting Operation System Not Found Trying to Install Ubuntu 22.04.1 LTS From USB Stick

Trying to install Ubuntu 22.04.1 LTS from the current .iso just downloaded from the official site 20 minutes ago. 

The machine is a Dell Vostro 3750 with a 2nd-gen Core i3 & 8GB RAM, 1TB HDD & running Win 10 21H1 64-bit.

I made a bootable USB drive using Balena Etcher per the instructions on the Ubuntu Desktop site.

When I try to boot to the USB, I'm getting "Operation System Not Found."

I'm looking to set up dual-boot on this machine. Google search has not been any help so far. Anyone know how to do this? 

After posting this to the Ubuntu group on Facebook, I saw something online about using Rufus instead of Balena. This formats the USB installer stick as FAT32.

 Rufus / MBR, FAT32 partitioning & formatting worked. Attempting install now.

Install appears to be proceeding normally. I'm going for dual-boot on the Vostro so either Win 10 or Ubuntu can be run at boot.

Dan 

Dell Vostro 3750 Installing Ubuntu in dual-boot with Windows 10

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MD-100 Lab: Managing Windows Update Settings - "Get Updates For Other Microsoft Products With Windows Updates" is greyed out

 MD-100 Lab: Managing Windows Update Settings

Student is told to go to Settings/Update & Security/Windows Update/Advanced Options and then turn on "Get Updates For Other Microsoft Products With Windows Updates".

The option in settings is greyed out.

At the top of Settings, it says in red: "Some Settings Are Managed By Your Organization"

To fix:

* Search GPEDIT.msc in the Windows search box

* Open Local Group Policy Editor

* Go to Computer Configuration/Administrative Templates/Windows Components/Windows Update

* Enable "Configure Automatic Updates" - no need to change any options, just enable it

(If "Configure Automatic Updates" is disabled, it will block being able to turn some options on or off in Windows Settings / Windows Update)

* Open an administrative Command Prompt

* Run GPUPDATE /Force

* Close & Reopen Windows Settings

Settings/Update & Security/Windows Update/Advanced Options and then turn on "Get Updates For Other Microsoft Products With Windows Updates" should now be functional

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MCSA Windows Server 2012

 

Invitation: Booth 70-412 #2 @ Mon Aug 17, 2020 12pm - 2pm (PDT) (cta.dan.stafford.onezerobutton@blogger.com)

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MCSA For Windows 10 Badge & Just Passed MCP For windows Server 2012 Install & Configure

Microsoft no longer issues certifications for MCP - the two I have from before February of 2019 are grandfathered. You have to complete a full MCSA series of exams before a Microsoft certificate is issued. You CAN, however, get badges via Acclaim based on the email address you registered with Microsoft for your exams. Reference THIS ARTICLE: 

Basic Ethernet Wiring:

Internal Function of a KVM Switch:

Explanation Of What IP Broadcast Messages Are Actually USED For...

I have had a really tough time finding a decent and easily-understood explanation of how broadcast messages are actually used in IP networking. Most articles online simply explain what broadcast messages are, but leave how they are used up to the imagination.

This article from Homenet How-To is the best I have found to-date:

https://www.homenethowto.com/switching/broadcasts/

Dan

Why Is A power Button Symbol A Zero With A One Stuck In It?

"For a CMOS gate operating at a power supply voltage of 5 volts, the acceptable input signal voltages range from0 volts to 1.5 volts for a “low” logic state, and 3.5 volts to 5 volts for a “high” logic state."

HIGH = 1 = ON

LOW  = 0 = OFF

Binary 1 = +3.5 - +5 VDC = ON = HIGH

Binary 0 = 0 VDC - + 1.5 VDC = OFF = LOW

128|064|032|016|008|004|002|001

000|000|000|000|000|000|000|000 = 0

000|000|000|000|000|000|000|001 = 1 ("One" bit is turned on)

000|000|000|000|000|000|001|000 = 2 ("Two" bit is turned on)

000|000|000|000|000|001|000|000 = 4 ("Four" bit is turned on)

000|000|000|000|001|000|000|001 = 9 ("One" bit + "Eight" bit turned on) (1+8)

000|001|000|000|001|000|000|000 = 72 ("Sixty Four" bit + "Eight" bit turned on)(64+8)

If you were to read the voltages in a memory chip address, there would be a series of 1's & 0's, with the 1's represented by a voltage of +3.5 to +5 volts, and the zeroes represented by a voltage of 0 to + 1.5 Volts. You would need a REALLY tiny voltmeter probe, but that's what would be in the chip.

Ones are ON, zeroes are OFF.

Now look at the symbol on your power button. You have the choice of ON or OFF. One or Zero.

All About 66-Block Punchdown For Alarms And Telecommunications

66 Blocks are the classic old-school telecommunications wiring punch-down block.

These blocks have been and are used for:

• POTS (Plain Old Telephone Service) Lines
• Analog and digital DS0 data circuits. (2400 bps – 64Kbps)
• T1 lines. (4 wires, 24 channels [USA], 1.544 Mbps digital)
• Low-voltage alarm wiring for equipment alarms, door and window sensors, fire alarms, HVAC unit alarms, Emergency generator alarms, etc.
• Traditional PBX business office phone systems.
• CCTV Camera power leads.

Odds are high that if you run into an active 66-block in the field, it will be used for low-voltage alarm wiring. However, you can never assume that it’s not legacy services still running some of the above-mentioned uses. Railroads, for instance, still use analog DS0 circuits to control track switches and crossing signals. You do NOT want to be the technician who breaks one of those!

What follows are graphics and explanations of various facts regarding 66-blocks.

66-Block with wiring punched down. Left pin pair are electrically connected, right pair are, but left is insulated from right.

Pre-wired 25-pair 66-Block with standard telecommunications color code. Pre-wiring goes to the female Amphenol connector on the side of the block. (Shown with dust cap)

Pre-wired 66-block with 25-pair Amphenol cable. (Male)

Female Amphenol connector

Male Amphenol connector.

Note the bridge clips being used to connect the left pin pair to the right. These are used to easily isolate one side of the wiring from the other, and just as quickly restore the connection. This is an extremely useful feature in troubleshooting wiring and equipment faults.

Punching down wiring on a 66-block. The underside of the tool cuts excess wire away to prevent shorts.

Watch for 66-Blocks with orange dust covers. ESPECIALLY if they have “RJ-21X” on the cover. An RJ-21X jack is a telecommunications provider demarcation point. The telecommunications provider owns one side of the block (Usually the side with the Amphenol pre-wire), and the customer may punch their equipment wiring down on the other side. This allows the telecom provider to isolate their service lines from the customer equipment by simply removing the bridge clips for a particular circuit during troubleshooting. The telecomm provider’s responsibility ends at their side of the RJ-21X.

Creating circuit loop-backs or extensions with 66-blocks. There are 66-block punch-down buts for punch-down tools that DO NOT have a cutting side. They can punch the wires down intact without cutting them. In the above picture, all the left-side pins of the same color are electrically connected because the wire is punched down, but not cut.

Standard 25-pair color code:

Pair colors: Blue, Orange, Green, Brown, Slate (Gray).

Tracer colors: White, Red, Black, Yellow, Violet.

More Color Code Charts:

Wikipedia on Telecomm wiring color codes:

https://en.wikipedia.org/wiki/25-pair_color_code

Can you spot the Telco demarc in this picture?

Nice spaghetti bowl there…

66-Blocks offer a lot more wiring flexibility than 110-block RJ45 patch panels, but are rarely used for Ethernet. There’s too much chance for electrical or inductive interference with the sensitive data signal at Ethernet speeds. However if you see these blocks in the field, you’ll now have some idea what you may be looking at.

Thank you for reading through!

Dan Stafford