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rustup is a utility used to install and remove rust toolchain. To list the current installed toolchain run: kenno@c2:~$ rustup show Default host: aarch64-unknown-linux-gnu rustup home: /home/kenno/.rustup installed toolchains -------------------- stable-aarch64-unknown-linux-gnu (default) 1.70.0-aarch64-unknown-linux-gnu 1.71.1-aarch64-unknown-linux-gnu 1.72.0-aarch64-unknown-linux-gnu active toolchain ---------------- stable-aarch64-unknown-linux-gnu (default) rustc 1.72.0 (5680fa18f 2023-08-23) To remove a specific version of the toolchain, e.g. 1.70.0-aarch64-unknown-linux-gnu run: kenno@c2:~$ rustup toolchain remove 1.70.0-aarch64-unknown-linux-gnu info: uninstalling toolchain '1.70.0-aarch64-unknown-linux-gnu' info: toolchain '1.70.0-aarch64-unknown-linux-gnu' uninstalled Let’s verify: kenno@c2:~$ rustup show Default host: aarch64-unknown-linux-gnu rustup home: /home/kenno/.rustup installed toolchains -------------------- stable-aarch64-unknown-linux-gnu (default) 1.71.1-aarch64-unknown-linux-gnu 1.72.0-aarch64-unknown-linux-gnu active toolchain ---------------- stable-aarch64-unknown-linux-gnu (default) rustc 1.72.0 (5680fa18f 2023-08-23) To install udpate the new toolchain, run: ...

I have written a hand full of Bash scripts, but none of those utilized array. Why? It’s because of two main things: 1. I don’t know how to use array in Bash, and 2. I would normally switch to write the script in Python instead. Today, however, I need to update an existing script written in Bash to make use of array. This was a perfect excuse for me to spend some 30 minutes to learn about array in Bash. I found a very good tutorial at the following [1]. ...

On AlmaLinux, the guest-tool for XCP-ng is provided by a package named xe-guest-utilities-latest, which in turn is available from the epel-release repository. The following list a few steps to get XCP-ng guest-tool installed on a VM running AlmaLinux 9. Enable epel-release repository if not yet enabled by first installing a package called epel-release. In my case, the repo has been already enabled. [root@xoa1 ~]# rpm -q epel-release epel-release-9-7.el9.noarch Install the guest-tool. If you’re unable to remember the full name of the package, just search for xe-guest. [root@xoa1 ~]# dnf search xe-guest Last metadata expiration check: 3:41:49 ago on Mon 16 Oct 2023 16:34:47. =================== Name Matched: xe-guest ================================== xe-guest-utilities-latest.x86_64 : XAPI Virtual Machine Monitoring Scripts [root@xoa1 ~]# dnf install xe-guest-utilities-latest -y ... Installed: xe-guest-utilities-latest-7.30.0-7.el9.x86_64 [root@xoa1 ~]# rpm -q xe-guest-utilities-latest xe-guest-utilities-latest-7.30.0-7.el9.x86_64 Finally, enable and start the xe-linux-distribution service. [root@xoa1 ~]# systemctl enable --now xe-linux-distribution.service Created symlink /etc/systemd/system/multi-user.target.wants/xe-linux-distribution.service → /usr/lib/systemd/system/xe-linux-distribution.service. [root@xoa1 ~]# systemctl status xe-linux-distribution.service ● xe-linux-distribution.service - Linux Guest Agent Loaded: loaded (/usr/lib/systemd/system/xe-linux-distribution.service; enabled; preset: disabled) Active: active (running) since Mon 2023-10-16 20:20:11 AEDT; 12s ago Process: 1714 ExecStartPre=/usr/sbin/sysctl net.ipv4.conf.all.arp_notify=1 (code=exited, status=0/SUCCESS) Process: 1715 ExecStartPre=/usr/sbin/xe-linux-distribution /var/cache/xe-linux-distribution (code=exited, status=0/SUCCESS) Main PID: 1720 (xe-daemon) Tasks: 9 (limit: 23054) Memory: 7.1M CPU: 42ms CGroup: /system.slice/xe-linux-distribution.service ├─1720 /usr/sbin/xe-daemon └─1723 logger -t xe-daemon -p debug Oct 16 20:20:11 xoa1 systemd[1]: Starting Linux Guest Agent... Oct 16 20:20:11 xoa1 sysctl[1714]: net.ipv4.conf.all.arp_notify = 1 Oct 16 20:20:11 xoa1 systemd[1]: Started Linux Guest Agent. The guest-tool for XCP-ng has now been installed on a VM running AlmaLinux (9). ...

Do you know? Well, before today, neither did I. I’m pretty late to Kubernetes. I heard about it many hears ago, but unfortunately, I had no need to use it at home or at work. Even today, there is no workload that requires a Kubernetes cluster to run on. However, I think I can’t ignore Kubernetes any longer, and I need to learn about it now, well “better be late than never”, right? ...

I use ’tmux’ on anything that runs it, from FreeBSD, macOS and Linux. On some of my Linux servers, noticeably openSUSE ones, when I connect to them via SSH, I would receive the following warning: ... Have a lot of fun... warning: Could not set up terminal. warning: TERM environment variable set to 'tmux-256color'. warning: Check that this terminal type is supported on this system. warning: Using fallback terminal type 'ansi'. What worse is that, when I switch to root account, the backspace key doesn’t work correctly. For example, hitting backspace will produce a space instead. ...