Harold2017

check port occupied by which process

sudo lsof -i
sudo lsof -i | grep TCP
sudo lsof -i :80 | grep LISTEN
sudo netstat -lptu
sudo netstat -tulpn
sudo ls -l /proc/$pid/exe

Harold2017

Install pipenv

with brew

brew install pipenv

with pip3

pip3 install pipenv

Harold2017

Update linux kernel

Find avaliable kernel

sudo apt-get update
apt-cache search --names-only linux-image

I found linux-image-4.15.0-36-generic is avaliable both in the kernel list and bbr list

Update both image and corresponding headers

Harold2017

docker rmi $(docker images -q -f dangling=true)
# docker rmi --force $(docker images -q -f dangling=true)

Harold2017

check ImageMagick format:

covert -list format

check ImageMagick config:

convert -list configure | grep svg

install rsvg

apt-get install librsvg2-bin

build ImageMagick with rsvg

wget https://imagemagick.org/download/ImageMagick-6.9.10-34.tar.gz

Harold2017

add alias function to ~/.zshrc

# proxy list
proxy() {
  export all_proxy=socks5://127.0.0.1:1086
  export http_proxy=http://127.0.0.1:1087
 export https_proxy=http://127.0.0.1:1087

Harold2017

Goroutine

G-P-M model source code

scheduler source code

Go Preemptive Scheduler Design Doc

Harold2017

How to add an image to a gist markdown

How to add an image to a gist

1. Create or find a gist that you own.
2. Clone your gist (replace <hash> with your gist's hash):

   # with ssh
   git clone git@gist.github.com:<hash>.git mygist

Harold2017

GC

Getting to Go: The Journey of Go's Garbage Collector

General

mgc.go

Harold2017

#!/bin/bash
# This gist is a step by step instructions to build and install OpenCV from source on ubuntu 16.04 LTS
# note:  The easy and quick way to install is
# sudo pip3 install opencv-python
# sudo pip3 install opencv-contrib-python
# But this easy pypi installation can’t open video files on GNU/Linux distribution or on mac OS X system.
# And on some system opencv binaries provided packages are not compiled.
# Therefor we have no way rather than build it from source.