Entries Categorized as 'How-To’s'

How To Block All Traffic From China Using iptables and ipset on Amazon Linux

Author: , October 24th, 2019

All credit to Matt Wilcox for this excellent article, for which this post is based – thank you, Matt! https://mattwilcox.net/web-development/unexpected-ddos-blocking-china-with-ipset-and-iptables/ All commands run as root!

Do this once only:

Then add blockchina to the root cron

How To Read Multiple Lines of User Input from the Command Line in Perl

Author: , October 9th, 2019

Use Case: Export Apple Reminders from MacOS application to cleaned plain text, i.e. remove unwanted spaces, blank lines and square brackets PROCEDURE Click on a single item in the MacOS Reminders app list Select All (either Command-a or use Edit->Select All) Copy (either Command-c or use Edit->Copy) Open Terminal Run cleanme Paste the copied reminders […]

How To Sync Box to S3 Using rclone

Author: , October 3rd, 2019

To sync various cloud resources, use the excellent cli tool rclone from https://rclone.org/docs/ For this use case, the need was to sync from Box to an AWS S3 bucket. Install rclone:

Configure both S3 and Box – for remote name labels I just used “S3” and “Box”:

Validate Access and Functionality:

Perform […]

How To Dual-Sort Query Results In WordPress Using get_posts

Author: , September 12th, 2019

Needed to build a feature for a Bookstore tool to have an optional sequence number for the Custom Post Type “books” that would allow items with a seq number to float to the top of the list and be sorted by seq #. The rest of the books would show underneath, sorted alphabetically.

How To Upgrade PHP on AWS Linux

Author: , August 22nd, 2019

As root:



Be sure to restart your web server!!

How To Prevent Vim From Auto-Commenting New Lines

Author: , August 4th, 2019

To prevent vim from added net comments, edit the .vimrc file in your home directory, and add:

How To Enable Variable References in Perl While Using Strict

Author: , August 4th, 2019

I wanted to call a sub-routine based on a variable in Perl, like this:

but it failed because of use strict:

To enable using a variable as a reference, simply specify that to Perl:

How To Print Matching Line and All After Using awk

Author: , August 1st, 2019

Every time I use awk, my respect for it grows! Like grep, find and rsync, it is one of the powerhouse command-line tools in my arsenal. Recently, I needed to list all MySQL binary log files from a starting file forwards in sequence. AWK to the rescue! For example, I knew the starting file was […]

How To Add a Simple Checkbox in Confluence

Author: , July 31st, 2019

While using Confluence, I wanted to learn how to add a simple task checkbox in free-flow text and lists without creating a “real” task. The answer is very easy – just type the square bracket pair [] and the checkbox will appear!

How To Fix File Sharing Problems in MacOS 10.14 Mojave

Author: , July 28th, 2019

When I upgraded to Mojave, my laptops were no longer able to connect to my desktop. Deeply frustrating. Long story short, combo of factors: – Mojave filesystems on disk now default to APFS containers – APFS filesystems can ONLY be shared out via SMB! – Hostname resolution in Mojave also seems broken So, the fix […]