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

Install pipenv

with brew

brew install pipenv

with pip3

pip3 install pipenv

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

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

Harold2017

from grpc_reflection.v1alpha import reflection


def list_services(address):
    channel = grpc.secure_channel(address, get_client_credentials())
    stub = reflection._reflection_pb2_grpc.ServerReflectionStub(channel)

    def gen():
        yield reflection._reflection_pb2.ServerReflectionRequest(host=address, list_services='')

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

Golang CPU usage in docker

// test.go
package main

import (
	"fmt"

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 [email protected]:<hash>.git mygist