I have Windows 11 VM running inside Qemu. Been trying to update it a few times, and everytime the VM could not boot. Perhaps some virtio driver might have prevented it from booting. After some googling, I was able to fix it.
Apply changes to all member accounts in an AWS organization
In this demo, I will use Cloudformation StackSets to create an IAM group in all accounts.
RPI4 under voltage
Out of curiosity, I ran some comparison between connecting my RPI4 to a USB port on a power strip, and to a QC power adapter. There is a clear winner.
Upgrade RockyLinux 8 to 9
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!