Here is how to do an in-place upgrade using dnf
Terraform and segregated permissions
Recently, there is an initiative to tighten up security control on terraform deployment. In this post, I will demo how to use provider alias and tell terraform to switch role for resource management
LVM Compression and Deduplication
With LVM / VDO, it is possible to save disk space using block-level compression and deduplication. I’ll show you how it’s done on Linux.
Edit gpg encrypted file with vim
Working with encrypted files can be troublesome at times. Thanks to James McCoy, there is a plugin for vim that makes the task so much easier.
Lelit Elizabeth PL92T Pressure Tuning
In this page, I will show you how to adjust the brewing pressure of Lelit PL92t.
jq transformation
I was working on a terraform module that creates cloudwatch alarms. AWS uniquely identifies metric with dimensions. All dimensions must be supplied to select the metric. In this case, the dimension comes from CWAgent and terraform external data source is used to obtain the dimension. A bit of jq work is needed to transform the…
Enable zswap on memory-limited systems
On systems where memory is limited – be that a SOC compute or a low-end virtual machine, enable zswap gives you more usable memory. This is similar to Stacker which compress your data and let you have more space. Back in those days, hard drives were measures in MB!
NVME SSD lifetime
Wonder if your NVME SSD is reaching retirement age? Follow these simple steps to get an idea.
Terraform module: Delete default VPCs
Terraform itself does not have the capability to delete default VPCs. In this example, I will use terraform and a shell script to perform the deletion.
Using U2F key for sudo authentication
I got my U2F key for use with online accounts. It is cheaper than the popular Yubikey and it works well. Did you know you can use it for sudo or pam authentication? Here is how.