MySQL 8 apt Error The following signatures were invalid
When trying to install MySQL 8 on Ubuntu 18.04, i get following error To fix this error, run Now apt
Google Cloud open a port in firewall
To open port 80 globally for all VMs on google cloud project, run
Postfix Delete Mails from a user
To delete emails from a particular user from postfix mail queue, run See postfix
Configure Failover IP in Ubuntu 18.04 OVH VPS
Default /etc/network/interfaces in Ubuntu 18.04 in OVH VPS look like following. Click here for Ubuntu 20.04 instructions. First install Configure
Amazon Route 53
Amazon Route 53 DKIM error How to export Amazon Route 53 DNS Zone
Amazon Route 53 DKIM error
DKIM keys failed to validate on a mail server. The domain used Amazon ROute 53 DNS server. amavisd-new showkeys command
Disable PHP on a folder
A web site had vlunerability, all allowed hacker to upload backdoor script to “uploads” folder used by the script. As
WordPress Backup and Migration Plugins
Migrate Guru: Migrate & Clone WordPress Free This plugin allow you to transfer your wordpress web site to another hosting
Dockerfile
Create Python Flask Docker Container
Create Python Flask Docker Container
Create a folder and change to the folder Create file Add following content Create file requirements.txt, add “Flask” to it.
kubectl
kubectl command is used to manage Kubernetes Clusters. To install kubectl on Linux, run On Ubuntu, you can install from
Create Kubernetes cluser using gcloud
Login to gcloud with Set default region To create a cluser, run To create a cluster with 2 nodes, run