Nginx is capable of forwarding a unix socket to UDP backend servers. This is quite handy for load balance syslog...
The owner of a scheduled CI/CD pipeline in GitLab will always be notified if the pipeline fails. Follow these steps...
Ever felt annoyed by AWS Free Tier limit alert emails? Just disable them: Billing preferences -> Cost Management Preferences -> Receive Free...
When terragrunt is relaying information to input variables it's happening via environment variables. Depending on the size of the...
If the project you're working on has, say, 39 repositories and counting in GitLab and you need all the...
If your postgres database is only accessible from inside a kubernetes cluster, e.g. if it's configured in AWS RDS...
Here's a one-liner to view base64 encoded secrets in kubernetes. Make sure you have jq installed.
There's a simple way in bolt to run commands from a file without caring about BASH escaping: # /home/user/foo.sh
In our monitoring, RabbitMQ queues like aliveness-test may show up as unresponsive, with a ping timeout after 10 seconds...
Instead of using Puppet exported resources you can use the puppetdb_query feature. This can result in more complex code...
If you get an error message like this: You have already activated some-gem 1.2.3, but your Gemfile requires some...
If you're deploying code for your lambda function via terraform, this code is usually zipped and uploaded to Amazon...
If you're using many terraform root modules in a repository, downloading common providers like the AWS one can quickly...
When you get this error message from e.g. loginctl show-user [...] after you deleted a user from your system:
What is netfilter's Connection Tracking system? The connection tracking system often referenced as nf_conntrack is part of the...
If you end up with an Elasticsearch cluster which has a very different disk usage on it's nodes you...
When you synchronize directories with rsync you have to pay attention to use (or not use) trailing /. Hint
When you need to know how a BIOS screen in a Lenovo Laptop works without actually booting into the BIOS...
Systemd's networkd will drop IP-Addresses configured by other processes like Keepalived's VRRP, when it is restarted. This...
After performing a live migration of a VM you may encounter issues with the clock of the migrated VM. The...
If you have a very large datadir in MariaDB and you want to transfer the data to another host (e.g...
If you're about to handle X509 certificates and don't want to remember/google a handful of openssl commands you...
aws ec2 describe-instances --output text --query 'Reservations[].Instances[?!not_null(Tags[?Key == `aws:autoscaling:groupName`].Value)] | [].[InstanceId]' | xargs -L1...
aws rds describe-db-instances | jq '.[][] | select(.DeletionProtection == false) | .DBInstanceIdentifier' | xargs -L1 -t aws rds modify-db-instance --deletion-protection...