mcmoe

This note is written by Sheldon. You can find me with #iOSBySheldon in Github, Youtube, Facebook, etc.

Need

Convert .mov/.MP4 to .gif

Reason

As a developer, I feel better to upload a short video when I create the pull request to show other viewers what I did in this PR. I tried .mov format directly got after finishing recording screen using Quicktime, however, gif offers preview in most web pages, and has smaller file size.

This is not limited to developer, anyone has this need can use this method to convert the files.

mcmoe

#OpenSSL cheat sheet This is a brief howto for socket programmers.

create RSA key pairs

ex: 1024bits length key pair:

$> openssl genrsa -out myprivate.pem 1024
$> openssl rsa -in myprivate.pem -pubout -out mypublic.pem