How To Expand an NVMe EBS Volumes After a Disk Resize on Amazon Linux 2

Author: , February 19th, 2021

Note how the partition at 259:1 is only 20GB, while the entire disk at 259:0 is 40GB. A partition resize is required in this case.

For more information, please visit the AMW Docs:

How To Fix “IOError: [Errno 10] No child processes” When Running the aws CLI Command from Perl WWW-REST-Apid

Author: , December 3rd, 2020

Problem While running the aws cli command from a Perl async command inside apid, I go the following error:

Solution The issue turned out to be a bug in Python2.7, so I upgraded to Python3.4, then uninstalled and re-installed the aws cli software so that it used the proper Python34 version. Procedure […]

How To Install MySQL 8.0 on AWS Linux 2

Author: , November 18th, 2020

How To Upgrade Certbot, Python and PIP on AWS Linux 1

Author: , May 6th, 2020

I ran letsencrypt-auto renew and got the following error:

The solution in this article gave me the answer:

Turns out Python was old at version 2.7, so did the following also:

Also had to change the cron job script to call certbot directly instead of letsencrypt-auto : vi /root/

How To Downgrade PIP After Upgrade on Amazon Linux

Author: , March 25th, 2020

I tried upgrading pip when prompted to do so: sudo pip install –upgrade pip This worked, but removed the system install in /usr/bin/pip and replaced it with /usr/local/bin/pip – NOT GOOD! The solution is as follows:

How To Show the Origin in Git

Author: , January 30th, 2020

Recently, I wanted to see the “origin” of the git repository I was working in. The command is: git remote -v For example:

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! All commands run as root!

Do this once only:

Then add blockchina to the root cron

How To Upgrade PHP on AWS Linux

Author: , August 22nd, 2019

As root:



Be sure to restart your web server!!

How To Obtain a Public Key from an AWS .pem Private Key on Linux and Mac

Author: , February 4th, 2019

Use the ssh-keygen command on a computer to which you’ve downloaded your private key .pem file; for example: First, ensure permissions will allow ssh-keygen to work: chmod 600 /path/to/the/file/your-key-pair.pem Then generate an RSA public key: ssh-keygen -y -f /path/to/the/file/your-key-pair.pem >

How To Move Around in Linux CLI Mail

Author: , May 7th, 2018

h Shows you a screenful of message headers (a “header” being the number, sender, date, size and subject). h with no message number shows the current screenful of messages (the number that make up a screenful is set with the screen variable, described below). h$ shows you the last screenful of messages — which is […]