alipek

The php-apcu-bc package provides a backwards compatibility layer from apcu -> apc, and is reuqired for some older PHP code bases (e.g. Yii 1). The package is not (yet) available in the Ubuntu 16.04 repos. To install it, use php-pear:

sudo apt-get install php-dev php-pear
sudo pecl install apcu_bc-beta

Then edit /etc/php/7.0/apache2/php.ini and add the following at the end of the file:

alipek

<?php

namespace AppBundle\Tool;


use RecursiveIterator;

class VariablesRecursiveIterator implements \RecursiveIterator
{
    private static $objects = [];

alipek

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

alipek

var connection = require('amqp').createConnection({host: 'localhost'});

connection.on('ready', function() {
	// create a temporary queue by passing an empty string as the queue name
	var queue = connection.queue('', function(queue) {
		
		console.log('connected to ' + queue.name);

		// bind the queue to all messages on the amq.rabbitmq.log topic exchange
		queue.bind('amq.rabbitmq.log', '#');

alipek

#!/bin/sh
docker images --format '{{.Size}}\t{{.Repository}}:{{.Tag}}\t{{.ID}}' | sort -h | column -t

alipek

<?php
echo is_resource(@fsockopen("localhost", "5672"))?"ok\n":"fail\n";

alipek

Delete all queue

rabbitmqctl list_queues | grep -v Listing | awk '{print $1}' | xargs -I '{}' rabbitmqadmin --user=$RABBITMQ_DEFAULT_USER --password=$RABBITMQ_DEFAULT_PASS delete queue 'name={}'

alipek

Safest way to clean up boot partition - Ubuntu 14.04LTS-x64, Ubuntu 16.04LTS-x64

Reference

Case I: if /boot is not 100% full and apt is working

1. Check the current kernel version

$ uname -r 

alipek

#!/bin/bash
#
# rotate_desktop.sh
#
# Rotates modern Linux desktop screen and input devices to match. Handy for
# convertible notebooks. Call this script from panel launchers, keyboard
# shortcuts, or touch gesture bindings (xSwipe, touchegg, etc.).
#
# Using transformation matrix bits taken from:
#   https://wiki.ubuntu.com/X/InputCoordinateTransformation

alipek

#!/bin/sh

EXPECTED_SIGNATURE=$(curl -sS https://composer.github.io/installer.sig)
php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
ACTUAL_SIGNATURE=$(php -r "echo hash_file('SHA384', 'composer-setup.php');")

if [ "$EXPECTED_SIGNATURE" != "$ACTUAL_SIGNATURE" ]
then
    >&2 echo 'ERROR: Invalid installer signature'
    rm composer-setup.php