npm install gitbook-cli -g
gitbook -V  # 检查版本

{
    "plugins": ["plugins1", "plugins2"],
    "pluginsConfig": {
        "plugins1": {...}
    }
}

"plugins" : [ "-search" ]

vmstat
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
 2  0   9496 1632720 1179760 4628968    0    0     9    37   55   12  3  1 96  0  0

vmstat [delay] [count]

Procs
   r: 显示多少进程在等待 CPU The number of runnable processes (running or waiting for run time).
   b: 显示多少进程正在进行不可终端的休眠，等待 IO(The number of processes in uninterruptible sleep)

Memory
   swpd: the amount of virtual memory used.
   free: the amount of idle memory.
   buff: the amount of memory used as buffers.
   cache: the amount of memory used as cache.
   inact: the amount of inactive memory.  (-a option)
   active: the amount of active memory.  (-a option)

Swap
   si: Amount of memory swapped in from disk (/s).
   so: Amount of memory swapped to disk (/s).

IO
   bi: Blocks received from a block device (blocks/s).
   bo: Blocks sent to a block device (blocks/s).

System
   in: 每秒中断数量 The number of interrupts per second, including the clock.
   cs: 每秒切换上下文次数 The number of context switches per second.

CPU
   These are percentages of total CPU time.
   us: 执行用户代码的时间 Time spent running non-kernel code.  (user time, including nice time)
   sy: 执行内核代码的时间 Time spent running kernel code.  (system time)
   id: Time spent idle.  Prior to Linux 2.5.41, this includes IO-wait time.
   wa: Time spent waiting for IO.  Prior to Linux 2.5.41, included in idle.
   st: Time stolen from a virtual machine.  Prior to Linux 2.6.11, unknown.

stress -c 4 -t 30

stress -i 2 -t 30

stress -d 2 -t 10

stress -m 2 --vm-bytes 256M -t 20

parted -s /dev/sda mklabel gpt

parted -s /dev/sda mkpart primary ext4 1 10G

parted -s /dev/sda mkpart logic 10G 20G

parted -s /dev/sda p

parted /dev/sdb mklabel gpt mkpart 1 ext4 1 5T

mkfs.ext4 /dev/sdb1

resizepart partition end

Swappiness is a property for the Linux kernel that changes the balance between swapping out runtime memory, as opposed to dropping pages from the system page cache. Swappiness can be set to values between 0 and 100 inclusive. A low value means the kernel will try to avoid swapping as much as possible where a higher value instead will make the kernel aggressively try to use swap space. The default value is 60, and for most desktop systems, setting it to 100 may affect the overall performance, whereas setting it lower (even 0) may improve interactivity (decreasing response latency.)[1]
In short:
vm.swappiness = 0 - it will swap only to avoid an out of memory condition
vm.swappiness = 60 - default value
vm.swappiness = 100 - it will swap aggressvely
To temporarily set the swappiness in Linux, as root you set the value to 100 with the following command: echo 100 > /proc/sys/vm/swappiness
Permanent changes are made in /etc/sysctl.conf via the following configuration line (inserted if not present previously): vm.swappiness = 100

vim /proc/sys/vm/swappiness
# or
echo 10 > /proc/sys/vm/swappiness

sysctl vm.swappiness=10

echo 'vm.swappiness=10' >>/etc/sysctl.conf

free -h

swapon -s                   # --summary 显示 swap 的使用情况
swapon --show               # 显示结果更好看

cat /proc/swaps             # 和 swapon -s 相同

swapoff /dev/mapper/VolGroup00-LogVol01

lvreduce -L 8G /dev/mapper/VolGroup00-LogVol01

mkswap /dev/mapper/VolGroup00-LogVol01

swapon /dev/mapper/VolGroup00-LogVol01

4G 以内的物理内存，SWAP 设置为内存的 2 倍。
4-8G 的物理内存，SWAP 等于内存大小。
8-64G 的物理内存，SWAP 设置为 8G。
64-256G 物理内存，SWAP 设置为 16G。

swapoff -a              #停止所有的 swap 分区

fdisk /dev/sdb

mkswap /dev/sdb2

swapon /dev/sdb2

/dev/sdb2 none swap sw 0 0

dd if=/dev/zero of=/root/swapfile bs=1M count=1024

mkswap /root/swapfile #建立 swap 的文件系统

swapon /root/swapfile #启用 swap 文件

/root/swapfile none swap sw 0 0

brew install node
npm install -g arcanist
arc help
arc upgrade

sudo apt update && sudo apt-get install php7.0-cli php7.0-curl php-pear

# 任意其它目录也可以
mkdir ~/phabricator
cd ~/phabricator
# 如果下载慢的话，可以先尝试设置一下 proxy: export https_proxy="ip:3128"
git clone https://github.com/facebook/libphutil.git
git clone https://github.com/facebook/arcanist.git

# 编辑~/.bashrc，加入如下一行，之后 source ~/.bashrc
export PATH="$PATH:$HOME/phabricator/arcanist/bin/"
# 如果没有项目配置，可以运行下面的命令设置全局的参数：
arc set-config default https://<phabricator server address>
arc install-certificate
# 按照屏幕提示，访问 http://<phabricator server address>/conduit/token/ , 把 token copy/paste 下来
# 在~/.bashrc 里添加下面两行
export EDITOR=vim
alias arc='LC_ALL=C arc'
# 并在命令行执行
source ~/.bashrc

{
  "config": {
    "default": "https://<phabricator server address>",
    "editor": "vim"
  },
  "hosts": {
    "https://<phabricator server>/api/": {
      "token": "cli-rdm2xxxxxxxxxxxx"
    }
  }
}

arc set-config phabricator.uri "<phabricator server>"
arc set-config editor "vim"

# 本地开发，新建 feature
arc feature feature_1
# 或 git checkout -b feature_1
# 修改本地文件，然后提交
git add
git commit

# 提交 code review
arc diff
# 通过 --reviewers name 参数可以指定 reviewer

# 这里可以和一个 Task（比如 T123）关联起来，在 Summary 那个域里填上 Ref T123，或者 Fixes T123
# 两者的区别是 Fixes 在代码提交后会自动关闭 Task，Ref 不会
# 也可以提交 code review 之后，在浏览器里操作

# 本地修改后再次提交 code review（这个 revision 是上次创建 code review 时的 id，比如 D1252）
arc diff --update 1252
# --update 1252 也可以不加，默认会合到上一个 review 中

# reviewer 已经 Accept 之后，提交代码（不要用 git push！）：
arc land feature_1
# 如果报错找不到对应的 revision，带上 revision 号（比如 1252）运行：
arc land --revision 1252
# land 之后，feature branch 会被自动删除
# land 使用后会将当前分支 merge 或者 squash merge 到 master 分支，提供详细的提交信息，推送到 master 并且删除本地分支

# hello.py
import click
@click.command()
@click.option('--count', default=1, help='Number of greetings.')
@click.option('--name', prompt='Your name',
              help='The person to greet.')
def hello(count, name):
    """Simple program that greets NAME for a total of COUNT times."""
    for x in range(count):
        click.echo('Hello %s!' % name)

if __name__ == '__main__':
    hello()

@click.command()
@click.option('--n', default=1)
def hello(n):
    click.echo('hello' * n)

@click.command()
@click.option('--pos', nargs=2, type=float)
def cal(pos):
    click.echo('%s / %s' % pos)

@click.command()
@click.option('--hash-type', type=click.Choice(['md5', 'sha1']))
def digest(hash_type):
    click.echo(hash_type)

@click.password_option()
@click.confirmation_option(prompt='Are you sure you want to drop the db?')

@click.command()
@click.argument('input', type=click.File('rb'))
@click.argument('output', type=click.File('wb'))
def inout(input, output):
    while True:
        chunk = input.read(1024)
        if not chunk:
            break
        output.write(chunk)

https://humdi.net/vnstat/

sudo apt install vnstat vnstati

sudo vnstat -u -i eth0

sudo update-rc.d vnstat enable

vnstat -l  # 或者 `--live` 实时流量
vnstat -h  # 显示小时流量
vnstat -d  # 显示日流量信息
vnstat -w  # 显示周流量信息
vnstat -m  # 显示月流量信息
vnstat -t  # 显示流量最高top10天

vnstati -i eth0 - -months - -output /dir/month.png

wget -qO- https://raw.githubusercontent.com/Jigsaw-Code/outline-server/master/src/server_manager/install_scripts/install_server.sh | bash

https://github.com/Jigsaw-Code/outline-releases

https://aweme.snssdk.com/aweme/v1/play/?
video_id=v0200fd80000bejku38697aj8tin1brg
&line=0
&ratio=720p
&watermark=1
&media_type=4
&vr_type=0
&test_cdn=None
&improve_bitrate=0
&version_code=270

https://api.amemv.com/aweme/v1/play/?video_id=v0200fd80000bejhsoir863vmi5add60&line=0&ratio=720p&media_type=4&vr_type=0&test_cdn=None&improve_bitrate=0

https://www.iesdouyin.com/share/video/6604280853952466190/?region=CN&mid=6601014204340275975&u_code=df31b2ff&titleType=title
http://v.douyin.com/dqv3dv/

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os
import re
from urllib.request import urlopen

import requests
from tqdm import tqdm


class DouyinVideoInfo:
    def __init__(self, vid, title='', nickname=''):
        self.video_id = vid
        self.title = title
        self.nickname = nickname


def download(url, filename, name):
    """
    :param url: 视频直接链接
    :param filename: 保存文件名
    :param name: 进度条内容
    :return:
    """
    file_size = int(urlopen(url).info().get('Content-Length', -1))

    if os.path.exists(filename):
        first_byte = os.path.getsize(filename)
    else:
        first_byte = 0
    if first_byte >= file_size:
        return file_size
    header = {"Range": "bytes=%s-%s" % (first_byte, file_size),
              'User-Agent': 'okhttp/3.10.0.1'}
    pbar = tqdm(total=file_size, initial=first_byte,
                unit='B', unit_scale=True,
                desc=name)
    req = requests.get(url, headers=header, stream=True)
    with(open(filename, 'wb')) as f:
        for chunk in req.iter_content(chunk_size=1024):
            if chunk:
                f.write(chunk)
                pbar.update(1024)
    pbar.close()
    return file_size


def down_by_vid(info: DouyinVideoInfo):
    r = requests.get('https://api.amemv.com/aweme/v1/play/', params={
        'video_id': info.video_id,
        'line': 0,
        'ratio': '720p',
        'watermark': 0,
        'media_type': 4,
        'vr_type': 0,
        'test_cdn': 'None',
        'improve_bitrate': 0,
        'logo_name': 'aweme'
    }, headers={
        'Host': 'api.amemv.com',
        'sdk-version': '1',
        'X-SS-TC': '0'
    }, allow_redirects=False)
    print(r.headers['Location'])
    download(r.headers['Location'], '{}.mp4'.format(info.video_id), info.title)


def get_video_info(long_url) -> DouyinVideoInfo:
    Headers = {
        'accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',
        'accept-encoding': 'gzip, deflate, br',
        'accept-language': 'zh-CN,zh;q=0.9',
        'cache-control': 'max-age=0',
        'upgrade-insecure-requests': '1',
        'user-agent': 'Mozilla/5.0 (Linux; U; Android 5.1.1; zh-cn; MI 4S Build/LMY47V) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/53.0.2785.146 Mobile Safari/537.36 XiaoMi/MiuiBrowser/9.1.3',
    }
    r = requests.get(long_url, headers=Headers)
    video_id = re.findall("(?<=video_id=).+?(?=&amp)", r.text)[0]
    title_name = re.findall("(?<=desc\">).+?(?=</p>)", r.text)[0]
    nick_name = re.findall("(?<=bottom-user\">).+?(?=</p>)", r.text)[0]
    info = DouyinVideoInfo(video_id, title_name, nick_name)
    return info


if __name__ == '__main__':
    d1 = 'https://www.iesdouyin.com/share/video/6604280853952466190/?region=CN&mid=6601014204340275975&u_code=df31b2ff&titleType=title'
    d2 = 'https://www.douyin.com/share/video/6536906252729978119/?region=CN&mid=6441083920867035918&titleType=title&timestamp=1522052360&utm_campaign=client_share&app=aweme&utm_medium=ios&iid=27151889375&utm_source=copy'
    info = get_video_info(d2)
    down_by_vid(info)

jekyll build

_site