Miles Cranmer MilesCranmer

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

Auto-deploying built products to gh-pages with GitHub Actions

This is a set up for projects which want to check in only their source files, but have their gh-pages branch automatically updated with some compiled output every time they push.

A file below this one contains the steps for doing this with Travis CI. However, these days I recommend GitHub Actions, for the following reasons:

It is much easier and requires less steps, because you are already authenticated with GitHub, so you don't need to share secret keys across services like you do when coordinate Travis CI and GitHub.
It is free, with no quotas.
Anecdotally, builds are much faster with GitHub Actions than with Travis CI, especially in terms of time spent waiting for a builder.

A simple Ghostscript command to merge two PDFs in a single file is shown below:

gs -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE=combine.pdf -dBATCH 1.pdf 2.pdf

Install Ghostscript:

Type the command sudo apt-get install ghostscript to download and install the ghostscript package and all of the packages it depends on.

Default

Powerlevel10k

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

	# These instructions assume you are using a Linux or Mac machine as
	# the “local” machine and an Amazon Linux as the “remote” machine.
	# Here’s one way to get X11 working between the two.

	# on the local machine (Linux or Mac with X11 already installed)
	$ ssh -X -i <amazon_key.pem> ec2-user@<remote_ec2_box_name>

	# then on the remote Amazon Linux EC2 box
	$ sudo yum install xauth
	$ sudo yum install xterm

	# Repeat an operation n times, e.g.
	# @dotimes 100 println("hi")

	macro dotimes(n, body)
	quote
	for i = 1:$(esc(n))
	$(esc(body))
	end
	end
	end

	import numpy

	from cffi import FFI

	ffi = FFI()
	ffi.cdef("""
	void single_test(double *x, int n);
	void multi_test(double **x, int n, int m);
	""")
	C = ffi.dlopen("./simple.so")

	http://bitdrift.com/post/4534738938/fork-your-own-project-on-github

	1. Create a new repo named bar at github.com

	2. git clone https://[email protected]/gerjantd/foo.git bar

	3. cd bar

	4. vi .git/config
	replace foo with bar