Chever-John

How to disable systemd-resolved in Ubuntu

Stages

• Disable and stop the systemd-resolved service:

    sudo systemctl disable systemd-resolved.service
    sudo systemctl stop systemd-resolved
  

• Then put the following line in the [main] section of your /etc/NetworkManager/NetworkManager.conf:

Chever-John

Parse the kubernetes manifest in yaml or json, don't care a manifest type.

Examples:

package main

import (
	"bytes"
	"context"

Chever-John

if _, err := os.Stat("/path/to/whatever"); os.IsNotExist(err) {
	// path/to/whatever does not exist
}

if _, err := os.Stat("/path/to/whatever"); !os.IsNotExist(err) {
	// path/to/whatever exists
}

Chever-John

ctr image pull docker.io/library/hello-world
ctr image pull docker.io/library/hello-world:latest
ctr image ls
ctr image ls -q
ctr c create docker.io/library/hello-world:latest demo
ctr c list
ctr image remove docker.io/library/hello-world:latest
ctr c list
ctr c remove demo

Chever-John

MOVE TO HERE

注意以下命令，需要切换到 root 后运行

安装 docker

首先确定已经安装完成 docker，如果没有安装可以使用以下脚本快速安装并配置：

Chever-John

Problem

The go command line tool needs to be able to fetch dependencies from your private GitLab, but authenticaiton is required.

This assumes your private GitLab is hosted at privategitlab.company.com.

Environment variables

The following environment variables are recommended:

export GO111MODULE=on
export GOPRIVATE=privategitlab.company.com

Chever-John

sudo apt-get install git
git config --global user.name "CheverJohn"
git config --global user.email "cheverjonathan@gmail.com"

Chever-John

// start etcd
nohup etcd &

// stop etcd
kill `pgrep etcd`

// get all route info
etcdctl get / --prefix --keys-only

// delete all route info

Chever-John

kubectl delete pods --all --all-namespaces
kubectl delete pod websocket-server-service

kubectl delete --all pods --namespace=foo

kubectl delete --all deployments --namespace=foo

kubectl delete --all namespaces

```bash

Chever-John

package main

import "fmt"

var validNames = map[string]bool{
  "blue":   true,
	"yellow": true,
}

func main() {