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@SheldonWangRJT
SheldonWangRJT / Convert .mov or .MP4 to .gif.md
Last active October 29, 2025 18:06
Convert Movie(.mov) file to Gif(.gif) file in one command line in Mac Terminal

This notes 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.

@corny
corny / ssh-multi.sh
Last active October 24, 2019 22:25 — forked from dmytro/ssh-multi.sh
Start multiple synchronized SSH connections with Tmux
#!/bin/bash
# ssh-multi.sh - a script to ssh multiple servers over multiple tmux panes
# usage: type tmux then from inside tmux type ssh-multi.sh HOST1 HOST2 ... HOSTN
# Muayyad Alsadi, D.Kovalov
# https://gist.github.com/muayyad-alsadi/bd25845776bb6b4185ba/
# https://gist.github.com/dmytro/3984680
# Based on http://linuxpixies.blogspot.jp/2011/06/tmux-copy-mode-and-how-to-control.html
# Tested with Ubuntu 16.04 and tmux 2.1
function error() {
@adham90
adham90 / spacemacs-keybindings
Last active September 5, 2025 05:30
spacemacs keybindings that i need to learn
SPC s c remove highlight
**** Files manipulations key bindings
Files manipulation commands (start with ~f~):
| Key Binding | Description |
|-------------+----------------------------------------------------------------|
| ~SPC f c~ | copy current file to a different location |
| ~SPC f C d~ | convert file from unix to dos encoding |
| ~SPC f C u~ | convert file from dos to unix encoding |
@simeonf
simeonf / pex.md
Last active July 5, 2024 06:19
Creating a PEX from a python script

So you want to create a pex that packages your script and its dependencies?

Ok - first to make our script! Call it foo.py:

import requests

if __name__ == '__main__':
  req = requests.get("https://raw.githubusercontent.com/pantsbuild/pex/master/README.rst")
  print req.text.split("\n")[0]
@udondan
udondan / include_vars_merged
Last active June 15, 2023 17:57
Ansible action plugin "include_vars_merged". Same as "include_vars" but merges hashes instead of overriding

Why?

Current version of Ansible (1.7.1) does not merge hashes in the include_vars task even if told so via hash_behaviour = merge in your ansible.cfg. ansible/ansible#9116

This action plugin will merge hashes no matter how you have configured your hash_behaviour.

How to setup:

Save include_vars_merged.py to library/plugins/action/include_vars_merged.py

Save include_vars_merged to library/custom/include_vars_merged

@jmvrbanac
jmvrbanac / install_pyenv.sh
Last active February 16, 2023 09:29
Install pyenv on Ubuntu
#!/bin/bash
sudo apt-get install git python-pip make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev curl
sudo pip install virtualenvwrapper
git clone https://github.com/yyuu/pyenv.git ~/.pyenv
git clone https://github.com/yyuu/pyenv-virtualenvwrapper.git ~/.pyenv/plugins/pyenv-virtualenvwrapper
echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bashrc
echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bashrc
@wsargent
wsargent / docker_cheat.md
Last active September 23, 2025 16:14
Docker cheat sheet
@acdha
acdha / paramiko-using-ssh-config.py
Created July 23, 2013 17:16
Connecting with paramiko using the user's OpenSSH config
client = paramiko.SSHClient()
client._policy = paramiko.WarningPolicy()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh_config = paramiko.SSHConfig()
user_config_file = os.path.expanduser("~/.ssh/config")
if os.path.exists(user_config_file):
with open(user_config_file) as f:
ssh_config.parse(f)
@GUI
GUI / install_vagrant_sudoers.sh
Created June 3, 2012 19:13
Allow Vagrant sudo-access without password for NFS-setup (for OS X)
#!/bin/bash
# Script for placing sudoers.d files with syntax-checking
# Making a temporary file to contain the sudoers-changes to be pre-checked
TMP=$(mktemp -t vagrant_sudoers)
cat /etc/sudoers > $TMP
cat >> $TMP <<EOF
# Allow passwordless startup of Vagrant when using NFS.
Cmnd_Alias VAGRANT_EXPORTS_ADD = /usr/bin/su root -c echo '*' >> /etc/exports
@jboner
jboner / latency.txt
Last active November 1, 2025 21:13
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD