In order to update and see changes made in the shell environment, most of the time reload is required. So, instead of restarting the machine and wasting a lot of time, a simple command will reload the bash, zsh, ksh or whatever shell you are using.

For those who might be questioning, mtime or short for modified timestamp, is a Linux file timestamp which usually goes hand in hand with the find command in the most common scenarios, including finding and removing files or backups older then n days. At…

Using AWS amazon linux 2 template for your EC2 instance is always a preferred way as an AWS-optimized and proprietary template. So if your web application requires an SSL/TLS certificate you can use the AWS certificate manager or the easiest and the quickest…

There are a lot of ways to generate random passwords, starting from simple password generator sites found online to the most advanced password management solutions. Today’s topic will be focused on creating passwords from the CLI using quick and simple methods.

The general idea for communication between microservices (whatever is HTTP, message or event-driven communication) is related to certain protocols and ports on which each microservice listens for incoming requests. Since Docker is the most popular choice…

Refreshing Terraform state is done by adding the -refresh-only flag (since terraform refresh is depricated) when running plan and apply operations. To start off, what does it mean and why are you getting stdout messsages telling you to add the -refresh-only…

There are a lot of open forums and discussions due to the Log4j zero-day flaw these days. Log4j is an open-source java-based library developed by Apache Software Foundation and it’s used for logging error messages. CVE-2021-44228 announced that there is a…

This might be a really weird or edge case scenario, but what If we need to access host service(s) from inside a Docker container. For instance, we already have configured and running a service on the dev host machine and kinda lazy to dockerize it.

As the Apache Log4j vulnerability is growing massively and its spread all over the internet a lot of worldwide companies are affected mostly on their Java-based applications. Elasticsearch among the others is highly affected by Log4j, the impact is still…

Docker Hub already announced public Log4jShell detection which is now live on Docker Official Images. But for those of you who are still using some of the old or custom images, there is a way to scan your Docker Images for Apache Log4j2 vulnerability. Let’s…

Working as a cloud engineer you may ask yourself, is it possible to create a CNAME record for your root domain? The answer will be no for most of the hosting providers but that’s not the case for Cloudflare. Cloudflare figured out that working on cloud, you…

Fine-tuning PostgreSQL requires a lot of experience and screw-ups along the way. Luckily, there is a configuration calculator available online made just for DevOps, SysOps and DB admins which could be quite handy.

There is a quick hack to get started with Podman if you are not familiar with the syntax though.

I wouldn’t place Oracle Cloud in my top 5 cloud providers list, and as we know the cloud isn’t cheap nor free, but it seems that Oracle are stepping up the competitive game by offering always free resources which not surprisingly comes up with a certain limitation.

Nowadays almost every owner of a website wants to secure his site with an SSL certificate. Once that is achieved the second step is to redirect the whole HTTP traffic to HTTPS depending on your web server, which will fully secure the connection between the…

Using the latest ARM templates schema API version is important only when provisioning new resources. In general, there is no need to keep up-to-date API version of the already deployed resources, unless it’s advised so by Azure. If it works, don’t fix it.…

Nowadays almost every owner of a website wants to secure his site with an SSL certificate. Once that is achieved the second step is to redirect the whole HTTP traffic to HTTPS depending on your web server, which will fully secure the connection between the…

It’s almost always not a good idea to decrypt aws_iam_user_login_profile password to Terraform output since there are better approaches, which will not be covered in this topic today. But just for the sake of argument, roll up your sleeves and try to decrypt…

Working with multiple AWS accounts can lead to timeouts between the different account services. Behind the VPC peering and the routing table connection, a very important thing is to set hosted zone association if you want to reach some service from the other…

Most likely, if you use ECS as your application orchestration service it will require some basic knowledge to manage Application Load Balancers short ALBs. Essentially managing the access of your application can be accomplished through the ALBs security group…

While migrating your WordPress site or syncing the production database with staging you need to change the domain URL from the database. Instead of crawling within the WP database, I will show you how to change WP domain URL through wp-cli which is a more…