Category Archives: How-To

How to: Linux Dual Boot on Dell 7710 with Windows 10, NVMe SSD, and UEFI

subtitle:  Linux doesn’t see Samsung SM951 M.2 PCIe NVMe SSD on Dell Precision 7710 laptop preloaded with Windows 10 Here are the steps I took to get LinuxMint 18 installed on a laptop with a NVMe SSD and UEFI while … Continue reading

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Debounce Code for Logix 5000

Here is a way to debounce the on and off signals in a Logix 5000 PLC:

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Stop Crimping RJ-45s

I am on a quest to convince people, especially controls and automation people, to stop crimping RJ-45 ends on Ethernet cables. Everyone else in the world terminates Ethernet to a punchdown block jack and then uses a pre-tested, pre-molded patch … Continue reading

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Add Virtual Network Interface to Ethernet Card

Want your single physical network adapter to have multiple addresses?  In Linux, it is very easy to add new addresses to your existing card, just use the ifconfig command: $ sudo ifconfig eth1:0 192.168.100.252 (eth1 is the physical adapter, 0 … Continue reading

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Gray Card for Photography

Create your own gray card by using photo editing software: fill with black adjust opacity to 50% (or just print the png above or this US Letter sized PDF Gray Card)

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Convert PDF to PNG using Linux

If you use the defaults for Imagemagick, the output of a PDF file with text converted to PNG is unreadable.  The secret is to use the density option: $ convert -density 300 xxxxx.pdf yyyyy.png If the original PDF has a … Continue reading

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Boot from ISO using GRUB2

Goal is to install new OS from an ISO image without creating a boot CD. Step 1:  Format hard disk to be used with a boot partition.  (set boot flag) Step 2:  Mount partition, create new directory named ‘boot’ (in … Continue reading

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Wood Repair Using Plastic Filler (bondo)

The house we just bought had damage to several of the stair trim pieces of wood from a dog.  Here are some pictures I took of my fix.  I started with a dowel glued in a hole I drilled, then … Continue reading

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Subversion (svn) on shared web host (bluehost) and Linux client setup

This explains how to configure and use a Subversion client from a GNU/Linux box*  to connect to a Subversion server on a shared web host account.  (bluehost.com)  If you have already set up a shared key for password-less ssh access … Continue reading

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use ssh without a password

Use a public/private key pair to avoid having to type in your password every time you open up a ssh session: 1- Generate a keypair, install the public key on the server and ‘authorize’ it. 2- Copy the private key(s) … Continue reading

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