Peter Jenkins peterjenkins1

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

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

-E: will describe the underlaying queries of the \ commands (cool for learning!)
-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

vimdiff cheat sheet

##git mergetool

In the middle file (future merged file), you can navigate between conflicts with ]c and [c.

Choose which version you want to keep with :diffget //2 or :diffget //3 (the //2 and //3 are unique identifiers for the target/master copy and the merge/branch copy file names).

:diffupdate (to remove leftover spacing issues)

:only (once you’re done reviewing all conflicts, this shows only the middle/merged file)

	const canIRun = navigator.mediaDevices.getDisplayMedia

	const takeScreenShot = async () => {
	const stream = await navigator.mediaDevices.getDisplayMedia({
	video: { mediaSource: 'screen' },
	})
	// get correct video track
	const track = stream.getVideoTracks()[0]
	// init Image Capture and not Video stream
	const imageCapture = new ImageCapture(track)

	import jenkins.model.Jenkins;
	import hudson.model.FreeStyleProject;
	import hudson.tasks.Shell;

	job = Jenkins.instance.createProject(FreeStyleProject, 'job-name')

	job.buildersList.add(new Shell('echo hello world'))

	job.save()

	# http://docs.openstack.org/developer/keystoneauth/index.html
	# http://www.jamielennox.net/blog/2014/09/15/how-to-use-keystoneclient-sessions/

	# In iPython: execfile('path/to/this/file')

	import os
	import logging

	from keystoneauth1.identity import v3
	from keystoneauth1 import session