Here is how to do an in-place upgrade using dnf
Tag: linux
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.
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.
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.
TLS1.3 on older linux distro
TLS1.3 is not commonly supported on older distro due to slow adaptation of new version of openssl. To get around that, we can compile libressl from source. Here is how I did it on AmazonLinux2.
Automatically update EL8
In EL7, we can use yum-cron to automatically install updates. On EL8, the equivalent tool is dnf-automatic. Here is how to set it up.
Load Averages on Linux/UNIX systems
Load Averages on Linux/UNIX systems
Run RHEL8 on docker with Red Hat UBI image
Red Hat is offering a few official docker images for RHEL8. One can now use or build images based on the latest operating system from Red Hat. Here is how to do it in 3 simple steps
RHEL8 and Ansible
Red Hat EL8 is available now since May 7th. It’s not particularly exciting IMO. Many “new” features have been available on other distros quite a while ago. Here, I want to evaluate how easy it is to adopt my existing ansible playbooks on this new version of Red Hat.