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Happy New Year 2024! This is going to be a very short post on how to use ‘df’ command to display the disk space usage in megabytes. To display the output in MB (megabytes), we can use the -m flag with the df command as the following: ❯ df -m Filesystem 1M-blocks Used Available Use% Mounted on devtmpfs 4 0 4 0% /dev tmpfs 852 0 852 0% /dev/shm tmpfs 341 6 336 2% /run /dev/mapper/almalinux-root 7578 2068 5511 28% / /dev/vda2 1014 280 735 28% /boot /dev/vda1 599 8 592 2% /boot/efi tmpfs 171 0 171 0% /run/user/1000 It’s simple, isn’t it?...

FreeBSD 14.0-RELEASE just got relesed at the end of last month, and I wanted to upgrade my NAS server running FreeBSD 13.x-RELEASE to 14.0. Using the installation instruction from [1], I was able to upgrade smoothly without any issues. Here are the steps: # freebsd-update fetch # freebsd-update install # freebsd-update upgrade -r 14.0-RELEASE # freebsd-update install Reboot: # reboot After rebooting, freebsd-update(8)[2] needs to be run again to install the new userland components:...

So I have an EC2 instance running RHEL 8.9 which was recently upgraded from RHEL 7.9. Now, I want to upgrade it all the way to RHEL 9. Here is the worklog which recording the steps I performed to achieve that goal. Step 0, perform a snapshot of the root volume of the instance, or create an AMI from it. In my case, this is just a test instance, so I skip taking the snapshot....

This evening I’m trying to enable EPEL repository on a RHEL 9 server, by following instruction is taken from How to install EPEL on RHEL and CentOS Stream article [1] by Red Hat Enable Sysadmin. Enable the CodeReady Linux Builder repository. $ sudo subscription-manager repos --enable \ codeready-builder-for-rhel-9-$(arch)-rpms Repository 'codeready-builder-for-rhel-9-x86_64-rpms' is enabled for this system. Install the EPEL RPM. $ sudo dnf install \ https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm ...snip... Installed: epel-release-9-7.el9.noarch Complete! Let’s try to install htop (available from the EPEL repo) to verify that everything is working: $ sudo dnf install htop -y ....

One joy of being parents when your children are in higher grade (say year 4 or 5) is that you’ll get a chance to review math lesson again in order to explain or help your children with their math problem. Nowadays, things are much easier for us parents due to unlimited of resources on the Internet. Earlier this evening, after spending time learning with my grade 4 child about Least Common Multiple (LCM) [1], I wanted to know the quickest way to verify the answer when computing of some numbers....