Entries Categorized as 'Technology'

How To Fix Let’s Encrypt Root Certificate Expiration on AWS Linux

Author: , October 7th, 2021

On Sept 30th 2021 Let’s Encrypts previous root certificate DST Root CA X3 (and it’s R3 intermediate) will expire. It has been replaced by their ISRG Root X1 certificate (and replacement R3 intermediate). The version of the R3 intermediate signing certificate which chains to DST Root CA X3 expired September 29 19:21:40 2021 GMT. The […]

How To Enable WordPress Debug

Author: , September 22nd, 2021

vi wp-config.php Add at the bottom:

You can also use this URL in later versions: /wp-login.php?action=entered_recovery_mode

How To Sync AWS S3 Buckets Using RClone

Author: , September 9th, 2021

The aws s3 sync command is slow and painful! I needed a more efficient way to sync to large buckets (prod to dev). Finally settled on RClone: https://rclone.org/docs/

During rclone config I called remote “s3” ;-}

How To Get A Reverse DNS Lookup On The Command Line

Author: , September 1st, 2021

There are three commands in Linux to easily get a reverse DNS lookup with: dig, host and nslookup. Here are examples of each: shell> dig -x 3.214.2.238 +short

shell> dig -x 3.214.2.238

shell> host 3.214.2.238

shell> nslookup 3.214.2.238

How To Load /etc/rc.local At Boot Time

Author: , August 12th, 2021

My /etc/rc.local was not loading at boot time. rc.local is a symlink to /etc/rc.d/rc.local lrwxrwxrwx 1 root root 13 Jun 22 2020 rc.local -> rc.d/rc.local I had to execute the following:

How To Force Postfix To Use Only IPv4

Author: , August 12th, 2021

vi /etc/postfix/main.cf

service postfix restart

How To Copy Key Pairs To Another AWS Region Using The ssh-keygen Command

Author: , August 4th, 2021

I wanted to use the same SSH keys for multiple AWS regions. As it turns out, AWS simply stores the public key when you download the private key as a .pem file. The solution is to simply generate the public key locally from the existing .pem, then import the public key using the same name […]

How To Allow AWS IAM Users EBS Snapshot Create And Delete Access

Author: , July 29th, 2021

SUMMARY: Needed to create an AWS IAM Policy to allow a user access to create and delete EBS snapshots. This script also needed to be able to list volumes:

How To Fix aws Command Error “You must specify a region”

Author: , July 29th, 2021

I was getting error “You must specify a region” when running any aws CLI command. The fix: Using the aws command:

which will automatically add the following to the file ~/.aws/config:

You many simply edit the ~/.aws/config file yourself and append the same thing:

How To Allow IAM Users AWS CDN Read/Write Access For W3 Total Cache

Author: , July 28th, 2021

SUMMARY: Needed to create an AWS IAM Policy to allow a user access to two buckets and their associated CDN’s in WordPress W3 Total Cache