| #!/bin/bash | |
| fn="$1" | |
| of=`echo $1 | sed s/mp4/jpg/` | |
| lf=`ffprobe -show_streams "$fn" 2> /dev/null | grep nb_frames | head -1 | cut -d \= -f 2` | |
| rm -f "$of" | |
| let "lf = $lf - 1" | |
| ffmpeg -i $fn -vf select=\'eq\(n,$lf\) -vframes 1 $of |
# Key considerations for algorithm "RSA" ≥ 2048-bit
openssl genrsa -out server.key 2048
# Key considerations for algorithm "ECDSA" ≥ secp384r1
# List ECDSA the supported curves (openssl ecparam -list_curves)
| #!/bin/bash | |
| ##################################################### | |
| # Name: Bash CheatSheet for Mac OSX | |
| # | |
| # A little overlook of the Bash basics | |
| # | |
| # Usage: | |
| # | |
| # Author: J. Le Coupanec | |
| # Date: 2014/11/04 |
| #!/bin/bash | |
| # Bash script to install latest version of ffmpeg and its dependencies on Ubuntu 12.04 or 14.04 | |
| # Inspired from https://gist.github.com/faleev/3435377 | |
| # Remove any existing packages: | |
| sudo apt-get -y remove ffmpeg x264 libav-tools libvpx-dev libx264-dev | |
| # Get the dependencies (Ubuntu Server or headless users): | |
| sudo apt-get update |
| #https://gorails.com/setup/ubuntu/14.04 | |
| sudo apt-get update | |
| sudo apt-get install git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties | |
| sudo apt-get install libgdbm-dev libncurses5-dev automake libtool bison libffi-dev | |
| curl -L https://get.rvm.io | bash -s stable | |
| source ~/.rvm/scripts/rvm | |
| echo "source ~/.rvm/scripts/rvm" >> ~/.bashrc | |
| rvm install 2.1.2 | |
| rvm use 2.1.2 --default |
Magic words:
psql -U postgresSome 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)
I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!
\
| <script src="http://cdnjs.cloudflare.com/ajax/libs/processing.js/1.4.1/processing-api.min.js"></script><html> | |
| <!-- | |
| Created using jsbin.com | |
| Source can be edited via http://jsbin.com/pdfjs-helloworld-v2/8598/edit | |
| --> | |
| <body> | |
| <canvas id="the-canvas" style="border:1px solid black"></canvas> | |
| <input id='pdf' type='file'/> | |
| <!-- Use latest PDF.js build from Github --> |
| <?php | |
| /** | |
| * Include posts from authors in the search results where | |
| * either their display name or user login matches the query string | |
| * | |
| * @author danielbachhuber | |
| */ | |
| add_filter( 'posts_search', 'db_filter_authors_search' ); | |
| function db_filter_authors_search( $posts_search ) { |
| #!/bin/bash | |
| # generate new personal ed25519 ssh key | |
| ssh-keygen -o -a 100 -t ed25519 -f ~/.ssh/id_ed25519 -C "rob thijssen <rthijssen@gmail.com>" | |
| # generate new host cert authority (host_ca) ed25519 ssh key | |
| # used for signing host keys and creating host certs | |
| ssh-keygen -t ed25519 -f manta_host_ca -C manta.network | |
| eval "$(ssh-agent -s)" |