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To delete all blank lines in vim: :g/^$/d “:” -> enter command-line mode “g” -> do the action globally (apply it to all lines to which the subsequent match applies) “/^$/” -> regex to mean “a line is a match if it contains nothing from start to finish” “d” -> the action to do for […]
vim – delete all blank lines Read More »
Welcome to the Grok Shop! If you look at your task manager in Windows 10, you might find some apps running that you didn’t start up yourself. For example, here I’m showing the “YourPhone.exe” app which I’ve never used and definitely did not start myself: So what’s going on, right? In Windows 10, Microsoft introduced
Disable Background Apps in Windows 10 Read More »
Don’t you just love a piece of software that has stood the test of time, and averted relegation to the wistful days of yore?? rsync is a perfect example of this. How has rsync achieved this? Well, you see, rsync is awesome! Say you have a folder on a remote machine that you want to
Getting Files Delta From A Remote Folder Using rsync Read More »
See Installed Kernels In Debian & Ubuntu, we can see the installed kernels with: % dpkg –list | grep linux-image ii linux-image-3.16.0-4-amd64 3.16.51-3 amd64 Linux 3.16 for 64-bit PCs ii linux-image-3.16.0-6-amd64 3.16.56-1+deb8u1 amd64 Linux 3.16 for 64-bit PCs ii linux-image-4.9.0-11-amd64 4.9.189-3 amd64 Linux 4.9 for 64-bit PCs ii linux-image-amd64 In Fedora / CentOS / RedHat
Linux Kernel – Check Installed and Switch Boot Kernel Read More »
A few different ways to check the linux distribution and release / version Ever find yourself in need of figuring out the exact linux distro and release number of the system you are on? As usual in Linux – there are several ways to do this! This is probably my favorite, because its succinct &
Linux – Check Distribution & Distro Version Read More »
See the video: Video Summary: How to stop spam / UCE with the Postfix mail transfer agent (MTA). Actual spam email is analyzed using mail logs and various SMTP restrictions are explored, as well as looking into how to setup client restriction maps to reject or defer. Lastly, different Postfix debug approaches are discussed. As
Stop Spam With Postfix Email Server Read More »
Turn up logging for individual clients A really nice feature Postfix has is this ability to debug individually-specified hosts and this is how you do that. Just add this to your main.cf: # Debug individually-specified hosts debug_peer_level=3 debug_peer_list=regexp:/etc/postfix/debug_peers In this case I have set the debug level to 3. The default level is 2. Also
Debugging and Tracing In Postfix Read More »
The Club Car V-Glide is a discrete multi-step potentiometer. There are several configurations of thses and here I try to coalesce the varied information I have found from Buggiesgonewild and other sources. Resistor Wattages: 1/2 watt or higher. To date, I have not found a definitive source on the resistor wattages, but I would reckon
Club Car V-Glide Resistors Read More »
Description How to Plug a Car Tire Puncture. A demonstration of how to use an automotive tire repair kit to make a repair to a hole in a tire caused by a nail or screw. A screw is removed and the tire is plugged. Leak testing & follow-up air pressure checks are discussed. Available on
How to Plug a Tire Using a Tire Repair Kit Read More »
Video Description The Postfix Mail Server (aka Mail Transfer Agent (MTA)) is installed, configured and set up to forward emails to a private email (Gmail in this case, but could be any external SMTP server) on a fresh Debian 9 system. The Blog Variant Installation We’ll start by opening a terminal from an non-root account
Postfix Mail Server Install, Configure & Forward to Gmail Read More »