Peter Merikan merikan

Lima Cheatsheet for macOS

I stumbled on an incredible open source solution, Lima. In some ways, it has some of Hashicorp's Vagrant's resemblance, but in my opinion, it's so much superior in many ways as it doesn't use external dependencies such as Oracle's VirtualBox.

If you're used to docker on the command line but wanted to play with VMs rather than containers, then this is for you! No need to fuss with cloud-init as a user account (using your existing username in whoami) with a proper home directory would be auto-generated for you with full passwordless sudo privilege. SSH access to the VMs from the host is seamlessly integrated as well.

This quick guide is for those who need to set up virtual machines with modern Linux OSes (only few selected OSes are best supported) from scratch using only the command line. You can have a VM up and running within minutes from absolutely nothing.

NOTE: This was last tested using:

`lima

A curated list of command-line utilities written in Rust

Note: I have moved this list to a proper repository. I'll leave this gist up, but it won't be updated. To submit an idea, open a PR on the repo.

Note that I have not tried all of these personally, and cannot and do not vouch for all of the tools listed here. In most cases, the descriptions here are copied directly from their code repos. Some may have been abandoned. Investigate before installing/using.

The ones I use regularly include: bat, dust, fd, fend, hyperfine, miniserve, ripgrep, just, cargo-audit and cargo-wipe.

atuin: "Magical shell history"
bandwhich: Terminal bandwidth utilization tool

ZSH CheatSheet

This is a cheat sheet for how to perform various actions to ZSH, which can be tricky to find on the web as the syntax is not intuitive and it is generally not very well-documented.

Strings

Description	Syntax
Get the length of a string	`${#VARNAME}`
Get a single character	`${VARNAME[index]}`

Installing tmux-256color for macOS

macOS 10.15.5
tmux 3.1b

macOS has ncurses version 5.7 which does not ship the terminfo description for tmux. There're two ways that can help you to solve this problem.

The Fast Blazing Solution

Instead of tmux-256color, use screen-256color which comes with system. Place this command into ~/.tmux.conf or ~/.config/tmux/tmux.conf(for version 3.1 and later):

Kubectl output options

Let's look at some basic kubectl output options.

Our intention is to list nodes (with their AWS InstanceId) and Pods (sorted by node).

We can start with:

kubectl get no

Requirements

Minikube requires that VT-x/AMD-v virtualization is enabled in BIOS. To check that this is enabled on OSX / macOS run:

sysctl -a | grep machdep.cpu.features | grep VMX

If there's output, you're good!

Prerequisites

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

	git clone https://github.com/vfarcic/go-demo.git

	cd go-demo

	docker-machine create -d virtualbox go-demo

	docker-machine env go-demo

	eval $(docker-machine env go-demo)

	public interface StoreRepository extends PagingAndSortingRepository<Store, String>,
	QueryDslPredicateExecutor<Store>, QuerydslBinderCustomizer<QStore> {

	@RestResource(rel = "by-location")
	Page<Store> findByAddressLocationNear(Point location, Distance distance, Pageable pageable);

	default void customize(QuerydslBindings bindings, QStore store) {
	bindings.bind(store.address.city).single((path, value) -> path.startsWith(value));
	bindings.bind(String.class).single((StringPath path, String value) -> path.contains(value));
	}