An example service definition under /etc/systemd/system/foo.service:
[Unit]
Description=Foo Service
After=network.target 
[Service]An example service definition under /etc/systemd/system/foo.service:
[Unit]
Description=Foo Service
After=network.target 
[Service]| default['sshd']['sshd_config']['AuthenticationMethods'] = 'publickey,keyboard-interactive:pam' | |
| default['sshd']['sshd_config']['ChallengeResponseAuthentication'] = 'yes' | |
| default['sshd']['sshd_config']['PasswordAuthentication'] = 'no' | 
| ### KERNEL TUNING ### | |
| # Increase size of file handles and inode cache | |
| fs.file-max = 2097152 | |
| # Do less swapping | |
| vm.swappiness = 10 | |
| vm.dirty_ratio = 60 | |
| vm.dirty_background_ratio = 2 | 
| # maximum capability of system | |
| user@ubuntu:~$ cat /proc/sys/fs/file-max | |
| 708444 | |
| # available limit | |
| user@ubuntu:~$ ulimit -n | |
| 1024 | |
| # To increase the available limit to say 200000 | |
| user@ubuntu:~$ sudo vim /etc/sysctl.conf | 
| const ws = require('ws') | |
| const crypto = require('crypto') | |
| const bfx = new ws('wss://api.bitfinex.com/ws/2') | |
| // Replace with your own api key and secret | |
| let api_key = '' | |
| let api_secret = '' | |
| // Ensure your nonce is always increasing | |
| let nonce = Date.now() | 
| # UPDATED 17 February 2019 | |
| # Redirect all HTTP traffic to HTTPS | |
| server { | |
| listen 80; | |
| listen [::]:80; | |
| server_name www.domain.com domain.com; | |
| return 301 https://$host$request_uri; | |
| } | |
| # SSL configuration | 
A quick guide to write a very very simple "ECHO" style module to redis and load it. It's not really useful of course, but the idea is to illustrate how little boilerplate it takes.
Step 1: open your favorite editor and write/paste the following code in a file called module.c
#include "redismodule.h"
/* ECHO <string> - Echo back a string sent from the client */
int EchoCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {| /** | |
| * 提取淘宝地址库 | |
| * | |
| * 用法: | |
| * 1. 打开淘宝 https://www.taobao.com/ | |
| * 2. 将下面代码复制到控制台 | |
| * 3. 按回车 | |
| * 4. 复制输出的 json 数据保存到你的文件 | |
| * | |
| * 仅支持: chrome 48+ | 
| html { | |
| /* Adjust font size */ | |
| font-size: 100%; | |
| -webkit-text-size-adjust: 100%; | |
| /* Font varient */ | |
| font-variant-ligatures: none; | |
| -webkit-font-variant-ligatures: none; | |
| /* Smoothing */ | |
| text-rendering: optimizeLegibility; | |
| -moz-osx-font-smoothing: grayscale; | 
| // This will open up a prompt for text to send to a console session on digital ocean | |
| // Useful for long passwords | |
| (function () { | |
| var t = prompt("Enter text to be sent to console, (This wont send the enter keystroke)").split(""); | |
| function f() { | |
| var character = t.shift(); | |
| var i=[]; | |
| var code = character.charCodeAt(); | |
| var needs_shift = "!@#$%^&*()_+{}:\"<>?~|".indexOf(character) !== -1 |