This evening while I was running the system update on one of the guest VMs running on my XCP-ng host, I accidentally rebooted the XCP-ng host. Why? Accident! The guest VM is very important, it’s running Xen Orchestra for this XCP-ng server. Semi-fortunately, I remember I had a snapshot for this VM. The challenge for me was, how could I restore the VM using that previous snapshot without Xen Orchestra. ...
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 ...snip... $ rpm -q htop htop-3.2.2-1.el9.x86_64 That’s it!