Ahmed Gasanov spryffee

If your master.key has been compromised, you might want to regenerate it.

No key regeneration feature at the moment. We have to do it manually.

Copy content of original credentials rails credentials:show somewhere temporarily.
Remove config/master.key and config/credentials.yml.enc
Run EDITOR=vim rails credentials:edit in the terminal: This command will create a new master.key and credentials.yml.enc if they do not exist.
Paste the original credentials you copied (step 1) in the new credentials file (and save + quit vim)
Add and Commit the file config/credentials.yml.enc

DEPRECATION NOTICE

This gist is now deprecated in favor of our official documentation: https://documentation.portainer.io/api/api-examples/ which contains up to date examples!

THE FOLLOWING DOCUMENTATION IS DEPRECATED

Please refer to the link above to get access to our updated API documentation and examples.

psql: FATAL: Peer authentication failed for user “postgres” (or any user)

The connection failed because by default psql connects over UNIX sockets using peer authentication, that requires the current UNIX user to have the same user name as psql. So you will have to create the UNIX user postgres and then login as postgres or use sudo -u postgres psql database-name for accessing the database (and psql should not ask for a password).

If you cannot or do not want to create the UNIX user, like if you just want to connect to your database for ad hoc queries, forcing a socket connection using psql --host=localhost --dbname=database-name --username=postgres (as pointed out by @meyerson answer) will solve your immediate problem.

But if you intend to force password authentication over Unix sockets instead of the peer method, try changing the following pg_hba.conf* line:

from

Revert the full commit

Sometimes you may want to undo a whole commit with all changes. Instead of going through all the changes manually, you can simply tell git to revert a commit, which does not even have to be the last one. Reverting a commit means to create a new commit that undoes all changes that were made in the bad commit. Just like above, the bad commit remains there, but it no longer affects the the current master and any future commits on top of it.

git revert {commit_id}

About History Rewriting

Delete the last commit

Deleting the last commit is the easiest case. Let's say we have a remote origin with branch master that currently points to commit dd61ab32. We want to remove the top commit. Translated to git terminology, we want to force the master branch of the origin remote repository to the parent of dd61ab32:

	<p style="color: green"><%= notice %></p>

	<h1>Albums</h1>

	<%= turbo_frame_tag :items do %>
	<% @albums.each do \|album\| %>
	<%= render album %>
	<p>
	<%= link_to "Show this album", album %>
	</p>

	# Run the last command as root
	sudo !!
	# Serve current directory tree at http://$HOSTNAME:8000/
	python -m SimpleHTTPServer
	# Save a file you edited in vim without the needed permissions
	:w !sudo tee %
	# change to the previous working directory
	cd -
	# Runs previous command but replacing
	^foo^bar

	// Source: https://twitter.com/calebporzio/status/1151876736931549185

	<div class="flex">
	<aside class="h-screen sticky top-0">
	// Fixed Sidebar
	</aside>

	<main>
	// Content
	</main>

	#!/bin/bash

	# generate new personal ed25519 ssh keys
	ssh-keygen -o -a 100 -t ed25519 -f ~/.ssh/id_ed25519 -C "rob thijssen <[email protected]>"
	ssh-keygen -o -a 100 -t ed25519 -f ~/.ssh/id_robtn -C "rob thijssen <[email protected]>"

	# generate new host cert authority (host_ca) ed25519 ssh key
	# used for signing host keys and creating host certs
	ssh-keygen -t ed25519 -f manta_host_ca -C manta.network

	qemu-img convert -O vdi gnome.qcow2 gnome.vdi


	#if its a raw image then:
	VBoxManage convertdd opnstk.raw VBox.vdi --format VDI