Daniel Kertesz piger

Using strace and lsof to debug blocked processes

You can use strace on a specific pid to figure out what a specific process is doing, e.g.:

strace -fp <pid>

You might see something like:

select(9, [3 5 8], [], [], {0, 999999}) = 0 (Timeout)

This article is now published on my website: Prefer Subshells for Context.

Mac OSX Spotlight Enhancement

Add this to Info.plist in /System/Library/Spotlight/RichText.mdimporter/Contents/ and Spotlight will search for source code files.

<string>public.c-header</string>
<string>public.c-plus-plus-header</string>
<string>public.c-source</string>
<string>public.objective-c-source</string>
public.c-plus-plus-source

THIS GIST WAS MOVED TO TERMSTANDARD/COLORS REPOSITORY.

PLEASE ASK YOUR QUESTIONS OR ADD ANY SUGGESTIONS AS A REPOSITORY ISSUES OR PULL REQUESTS INSTEAD!

TLDR: I now add the following snippet to all my Dockerfiles:

# If host is running squid-deb-proxy on port 8000, populate /etc/apt/apt.conf.d/30proxy
# By default, squid-deb-proxy 403s unknown sources, so apt shouldn't proxy ppa.launchpad.net
RUN route -n | awk '/^0.0.0.0/ {print $2}' > /tmp/host_ip.txt
RUN echo "HEAD /" | nc `cat /tmp/host_ip.txt` 8000 | grep squid-deb-proxy \
  && (echo "Acquire::http::Proxy \"http://$(cat /tmp/host_ip.txt):8000\";" > /etc/apt/apt.conf.d/30proxy) \
  && (echo "Acquire::http::Proxy::ppa.launchpad.net DIRECT;" >> /etc/apt/apt.conf.d/30proxy) \
  || echo "No squid-deb-proxy detected on docker host"

	ctrl-z
	bg

	touch /tmp/stdout
	touch /tmp/stderr
	gdb -p $!

	# In GDB
	p dup2(open("/tmp/stdout", 1), 1)
	p dup2(open("/tmp/stderr", 1), 2)

	import sys, threading, Queue, weakref

	try:
	import Tkinter
	_has_tk = True
	_debug_win = None
	except ImportError:
	# quietly disable ourselves
	_has_tk = False

	from jinja2 import Template

	template = '''
	.container{{ full_width }} {
	margin-right: auto;
	margin-left: auto;
	*zoom: 1;
	}
	.container{{ full_width }}:before,
	.container{{ full_width }}:after {

	#!/bin/bash

	curl -XDELETE http://localhost:9200/_template/logstash?pretty=true

	echo
	echo "Deleted current logstash template..."

	echo "Creating new logstash template..."
	sleep 2

	# Ivaylo Kuzev <[email protected]>, 2014
	# Zenburn like colorscheme for https://github.com/hut/ranger .

	# default colorscheme.
	# Copyright (C) 2009-2013 Roman Zimbelmann <[email protected]>
	# This software is distributed under the terms of the GNU GPL version 3.

	from ranger.gui.colorscheme import ColorScheme
	from ranger.gui.color import *