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@chrisroos
chrisroos / gpg-import-and-export-instructions.md
Created September 9, 2011 10:49
Instructions for exporting/importing (backup/restore) GPG keys

Every so often I have to restore my gpg keys and I'm never sure how best to do it. So, I've spent some time playing around with the various ways to export/import (backup/restore) keys.

Method 1

Backup the public and secret keyrings and trust database

cp ~/.gnupg/pubring.gpg /path/to/backups/
cp ~/.gnupg/secring.gpg /path/to/backups/
cp ~/.gnupg/trustdb.gpg /path/to/backups/

or, instead of backing up trustdb...

@masak
masak / explanation.md
Last active July 13, 2026 21:32
How is git commit sha1 formed

(The below text is licensed with CC0, which means that if you want to use or translate it, that is OK by me.)

Ok, I geeked out, and this is probably more information than you need. But it completely answers the question. Sorry. ☺

Locally, I'm at this commit:

$ git show
commit d6cd1e2bd19e03a81132a23b2025920577f84e37
Author: jnthn <jnthn@jnthn.net>

Date: Sun Apr 15 16:35:03 2012 +0200

@ion1
ion1 / install-ghc.md
Last active December 13, 2017 21:01
Installing GHC under the home directory

Installing GHC under the home directory

  1. Install stack.
  2. Run stack setup as a normal user. This will install GHC for you (under ~/.stack).
  3. Run stack ghci to start ghci. Please see the rest of the page linked above on how to use stack to create and build projects.
@econchick
econchick / gist:4666413
Last active January 19, 2026 15:03
Python implementation of Dijkstra's Algorithm
class Graph:
def __init__(self):
self.nodes = set()
self.edges = defaultdict(list)
self.distances = {}
def add_node(self, value):
self.nodes.add(value)
def add_edge(self, from_node, to_node, distance):
@jossef
jossef / colors.py
Last active February 2, 2023 20:39
python coloring for linux, based on this answer http://stackoverflow.com/a/26445590/3191896
def color(text, **user_styles):
styles = {
# styles
'reset': '\033[0m',
'bold': '\033[01m',
'disabled': '\033[02m',
'underline': '\033[04m',
'reverse': '\033[07m',
@mobeigi
mobeigi / MD5 Collision Demo
Created April 3, 2015 03:48
MD5 Collision Demo
From: http://www.mscs.dal.ca/~selinger/md5collision/
Block 1:
d131dd02c5e6eec4693d9a0698aff95c 2fcab58712467eab4004583eb8fb7f89
55ad340609f4b30283e488832571415a 085125e8f7cdc99fd91dbdf280373c5b
d8823e3156348f5bae6dacd436c919c6 dd53e2b487da03fd02396306d248cda0
e99f33420f577ee8ce54b67080a80d1e c69821bcb6a8839396f9652b6ff72a70
Block 2:
d131dd02c5e6eec4693d9a0698aff95c 2fcab50712467eab4004583eb8fb7f89
@maxclaus
maxclaus / curl-get-status-code-and-response-body.sh
Created November 24, 2015 17:52
Curl - Get status code and response body
URL="http://stackoverflow.com/"
# store the whole response with the status at the and
HTTP_RESPONSE=$(curl --silent --write-out "HTTPSTATUS:%{http_code}" -X POST $URL)
# extract the body
HTTP_BODY=$(echo $HTTP_RESPONSE | sed -e 's/HTTPSTATUS\:.*//g')
# extract the status
HTTP_STATUS=$(echo $HTTP_RESPONSE | tr -d '\n' | sed -e 's/.*HTTPSTATUS://')
@damusix
damusix / aws_iam_secret_to_smtp_password.md
Last active June 8, 2026 19:26
Convert AWS IAM credentials to AWS SMTP credentials

Convert AWS IAM credentials to AWS SMTP credentials

If you do, or want to, use AWS to deploy your apps, you will end up using AWS SES via SMTP when you're launching an app that sends out emails of any kind (user registrations, email notifications, etc). For example, I have used this configuration on various Ruby on Rails apps, however, it is just basic SMTP configurations and crosses over to any framework that supports SMTP sendmail.

There are two ways to go about this:

Luckily, you found this MD file and the NOT SO EASY WAY is suddenly copy-pasta... sudo yum....

@dduvnjak
dduvnjak / add_cloudflare_ips.sh
Last active January 30, 2026 02:50
Add CloudFlare IP addresses to an EC2 Security Group using awscli
# first we download the list of IP ranges from CloudFlare
wget https://www.cloudflare.com/ips-v4
# set the security group ID
SG_ID="sg-00000000000000"
# iterate over the IP ranges in the downloaded file
# and allow access to ports 80 and 443
while read p
do
@alexsasharegan
alexsasharegan / .htaccess
Created September 7, 2016 00:36
Apache Config for React Router
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.html$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule . /index.html [L]