apt install nginx mysql-server php7.0 php-bz2 php-curl php-gd php-imagick php-intl php-mbstring php-xml php-zip

@task(base=QueueOnce, once={'graceful': True})

@celery.task(base=QueueOnce, once={'keys': ['a']})
def slow_add(a, b):
    sleep(30)
    return a + b

pip install -U celery_once

from celery import Celery
from celery_once import QueueOnce
from time import sleep

celery = Celery('tasks', broker='amqp://guest@localhost//')
celery.conf.ONCE = {
  'backend': 'celery_once.backends.Redis',
  'settings': {
    'url': 'redis://localhost:6379/0',
    'default_timeout': 60 * 60
  }
}

example.delay(10)
# 修改为
result = example.apply_async(args=(10))

@celery.task(base=QueueOnce, once={'graceful': True, keys': ['a']})
def slow_add(a, b):
    sleep(30)
    return a + b

pip install pipenv

pipenv --python 3
pipenv --python 3.6.1
pipenv --python 2.7.13

pipenv install requests
pipenv install requests==2.19.1
pipenv install --dev requests       # 安装开发环境依赖

pipenv install -r path/to/requirements.txt

pipenv lock -r
pipenv lock -r -d       # 生成 dev requirements

[[source]]
url = "https://pypi.python.org/simple"
verify_ssl = true
name = "pypi"

[[source]]
url = "http://pypi.home.kennethreitz.org/simple"
verify_ssl = false
name = "home"

[dev-packages]

[packages]
requests = {version="*", index="home"}
maya = {version="*", index="pypi"}
records = "*"

pipenv shell
exit

pipenv graph
requests==2.19.1
  - certifi [required: >=2017.4.17, installed: 2018.8.13]
  - chardet [required: >=3.0.2,<3.1.0, installed: 3.0.4]
  - idna [required: >=2.5,<2.8, installed: 2.7]
  - urllib3 [required: >=1.21.1,<1.24, installed: 1.23]

pipenv uninstall --all

pipenv check --style hello.py

sudo add-apt-repository ppa:wireshark-dev/stable && sudo apt-get update
sudo apt-get install wireshark

sed [-neifr] [命令]

a ：新增， a 的后面可以接字串，而这些字串会在新的一行出现(目前的下一行)～
c ：取代， c 的后面可以接字串，这些字串可以取代 n1,n2 之间的行！
d ：删除
i ：插入， i 的后面可以接字串，而这些字串会在新的一行出现(目前的上一行)；
p ：列印，亦即将某个选择的数据印出。通常 p 会与参数 sed -n 一起运行～
s ：替换，通常这个 s 的命令可以搭配正则 `1,20s/old/new/g` 

nl /etc/passwd | sed '2,5d'
1 root:x:0:0:root:/root:/bin/bash
6 sync:x:5:0:sync:/sbin:/bin/sync
7 shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown

nl /etc/passwd | sed '2d' 

nl /etc/passwd | sed '3,$d' 

nl /etc/passwd | sed '2a drink tea'
1 root:x:0:0:root:/root:/bin/bash
2 bin:x:1:1:bin:/bin:/sbin/nologin
drink tea
3 daemon:x:2:2:daemon:/sbin:/sbin/nologin

nl /etc/passwd | sed '2i drink tea' 

nl /etc/passwd | sed '2a Drink tea or ......\
> drink beer ?'
1 root:x:0:0:root:/root:/bin/bash
2 bin:x:1:1:bin:/bin:/sbin/nologin
Drink tea or ......
drink beer ?
3 daemon:x:2:2:daemon:/sbin:/sbin/nologin

nl /etc/passwd | sed '2,5c No 2-5 number'
1 root:x:0:0:root:/root:/bin/bash
No 2-5 number
6 sync:x:5:0:sync:/sbin:/bin/sync

nl /etc/passwd | sed -n '5,7p'
5 lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin
6 sync:x:5:0:sync:/sbin:/bin/sync
7 shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown

nl /etc/passwd | sed '/root/p'
1  root:x:0:0:root:/root:/bin/bash
1  root:x:0:0:root:/root:/bin/bash
2  daemon:x:1:1:daemon:/usr/sbin:/bin/sh
3  bin:x:2:2:bin:/bin:/bin/sh
4  sys:x:3:3:sys:/dev:/bin/sh
5  sync:x:4:65534:sync:/bin:/bin/sync

nl /etc/passwd | sed -n '/root/p'
1  root:x:0:0:root:/root:/bin/bash

sed -n '2,5p' file

nl /etc/passwd | sed  '/root/d'
2  daemon:x:1:1:daemon:/usr/sbin:/bin/sh
3  bin:x:2:2:bin:/bin:/bin/sh

nl /etc/passwd | sed -n '/root/{s/bash/blueshell/;p}'
1  root:x:0:0:root:/root:/bin/blueshell

nl /etc/passwd | sed -n '/bash/{s/bash/blueshell/;p;q}'    
1  root:x:0:0:root:/root:/bin/blueshell

nl /etc/passwd | sed -e '3,$d' -e 's/bash/blueshell/'
1  root:x:0:0:root:/root:/bin/blueshell
2  daemon:x:1:1:daemon:/usr/sbin:/bin/sh

sed -i 's/\.$/\!/g' filename.txt         # 将文件每一行最后的. 替换为!
sed -i '$a # add to last' filename.txt   # 每一行后面($) 增加(a) 后面的内容

apt-get install nginx mysql-server php7.0 php7.0-common php7.0-curl php7.0-mysql php7.0-gd php7.0-xml php7.0-mbstring

wget https://github.com/Chevereto/Chevereto-Free/archive/1.0.9.tar.gz

server {
    listen 80;
    listen [::]:80;

    root /var/www/photo.einverne.info/html;
    index index.php index.html index.htm;

    server_name server_domain_or_IP;

    location / {
        try_files $uri $uri/ =404;
    }

    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/run/php/php7.0-fpm.sock;
    }

    location ~ /\.ht {
        deny all;
    }
}

mysql -u root -p          # 登录mysql
create database photo;    # 创建 photo 数据库

max_execution_time
max_input_time
memory_limit
post_max_size
upload_max_filesize

Server error (Internal server error)

tailf /var/log/nginx/error.log

2018/02/05 19:21:12 [error] 2693#2693: *8 client intended to send too large body: 1318270 bytes, client: 172.xxx.xxx.xxx, server: photo.einverne.info, request: "POST /json HTTP/1.1", host: "photo.einverne.info", referrer: "http://photo.einverne.info/dashboard/settings/system"

vi /etc/nginx/nginx.conf

client_max_body_size 20M;

private final OkHttpClient client = new OkHttpClient();

public void run() throws Exception {
    Request request = new Request.Builder()
        .url("http://publicobject.com/helloworld.txt")
        .build();

    Response response = client.newCall(request).execute();
    if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

    Headers responseHeaders = response.headers();
    for (int i = 0; i < responseHeaders.size(); i++) {
      System.out.println(responseHeaders.name(i) + ": " + responseHeaders.value(i));
    }

    System.out.println(response.body().string());
}

private final OkHttpClient client = new OkHttpClient();

public void run() throws Exception {
    Request request = new Request.Builder()
        .url("http://publicobject.com/helloworld.txt")
        .build();

    client.newCall(request).enqueue(new Callback() {
      @Override public void onFailure(Request request, Throwable throwable) {
        throwable.printStackTrace();
      }

      @Override public void onResponse(Response response) throws IOException {
        if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

        Headers responseHeaders = response.headers();
        for (int i = 0; i < responseHeaders.size(); i++) {
          System.out.println(responseHeaders.name(i) + ": " + responseHeaders.value(i));
        }

        System.out.println(response.body().string());
      }
    });
}

public static final MediaType MEDIA_TYPE_MARKDOWN
  = MediaType.parse("text/x-markdown; charset=utf-8");

private final OkHttpClient client = new OkHttpClient();

public void run() throws Exception {
    String postBody = ""
        + "Releases\n"
        + "--------\n"
        + "\n"
        + " * _1.0_ May 6, 2013\n"
        + " * _1.1_ June 15, 2013\n"
        + " * _1.2_ August 11, 2013\n";

    Request request = new Request.Builder()
        .url("https://api.github.com/markdown/raw")
        .post(RequestBody.create(MEDIA_TYPE_MARKDOWN, postBody))
        .build();

    Response response = client.newCall(request).execute();
    if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

    System.out.println(response.body().string());
}

public static final MediaType MEDIA_TYPE_MARKDOWN
      = MediaType.parse("text/x-markdown; charset=utf-8");

private final OkHttpClient client = new OkHttpClient();

public void run() throws Exception {
    RequestBody requestBody = new RequestBody() {
      @Override public MediaType contentType() {
        return MEDIA_TYPE_MARKDOWN;
      }

      @Override public void writeTo(BufferedSink sink) throws IOException {
        sink.writeUtf8("Numbers\n");
        sink.writeUtf8("-------\n");
        for (int i = 2; i <= 997; i++) {
          sink.writeUtf8(String.format(" * %s = %s\n", i, factor(i)));
        }
      }

      private String factor(int n) {
        for (int i = 2; i < n; i++) {
          int x = n / i;
          if (x * i == n) return factor(x) + " × " + i;
        }
        return Integer.toString(n);
      }
    };

    Request request = new Request.Builder()
        .url("https://api.github.com/markdown/raw")
        .post(requestBody)
        .build();

    Response response = client.newCall(request).execute();
    if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

    System.out.println(response.body().string());
}

public static final MediaType MEDIA_TYPE_MARKDOWN
  = MediaType.parse("text/x-markdown; charset=utf-8");

private final OkHttpClient client = new OkHttpClient();

public void run() throws Exception {
    File file = new File("README.md");

    Request request = new Request.Builder()
        .url("https://api.github.com/markdown/raw")
        .post(RequestBody.create(MEDIA_TYPE_MARKDOWN, file))
        .build();

    Response response = client.newCall(request).execute();
    if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

    System.out.println(response.body().string());
}

public void run() throws Exception {
    RequestBody formBody = new FormEncodingBuilder()
        .add("search", "Jurassic Park")
        .build();
    Request request = new Request.Builder()
        .url("https://en.wikipedia.org/w/index.php")
        .post(formBody)
        .build();

    Response response = client.newCall(request).execute();
    if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

    System.out.println(response.body().string());
}

private static final String IMGUR_CLIENT_ID = "...";
private static final MediaType MEDIA_TYPE_PNG = MediaType.parse("image/png");

private final OkHttpClient client = new OkHttpClient();

public void run() throws Exception {
    // Use the imgur image upload API as documented at https://api.imgur.com/endpoints/image
    RequestBody requestBody = new MultipartBuilder()
        .type(MultipartBuilder.FORM)
        .addPart(
            Headers.of("Content-Disposition", "form-data; name=\"title\""),
            RequestBody.create(null, "Square Logo"))
        .addPart(
            Headers.of("Content-Disposition", "form-data; name=\"image\""),
            RequestBody.create(MEDIA_TYPE_PNG, new File("website/static/logo-square.png")))
        .build();

    Request request = new Request.Builder()
        .header("Authorization", "Client-ID " + IMGUR_CLIENT_ID)
        .url("https://api.imgur.com/3/image")
        .post(requestBody)
        .build();

    Response response = client.newCall(request).execute();
    if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

    System.out.println(response.body().string());
}

awk ' /MA/ { print $1 }' list

awk [options] 'script' file

awk -F ':' '{print $1}' /etc/passwd

Grape(100g)1980
raisins(500g)1990
plum(240g)1997
apricot(180g)2005
nectarine(200g)2008

$ awk -F '[()]' '{print $1, $2, $3}' some.log
Grape 100g 1980
raisins 500g 1990
plum 240g 1997
apricot 180g 2005
nectarine 200g 2008

peach    100   Mar  1997   China
Lemon    150   Jan  1986   America
Pear     240   Mar  1990   Janpan
avocado  120   Feb  2008   china

awk '{print $0}' fruit.txt   # 表示打印输出文件的每一整行的内容
awk '{print $1}' fruit.txt   # 表示打印输出文件的每一行的第 1 列内容
awk '{print $1, $2}' fruit.txt

awk '{$2 = "***"; print $0}' fruit.txt

awk '{print $1 "\t" $2 "\t" $3}' fruit.txt

awk '{print NR "\t" $0}' fruit.txt

1   peach    100   Mar  1997   China
2   Lemon    150   Jan  1986   America
3   Pear     240   Mar  1990   Janpan
4   avocado  120   Feb  2008   china

awk '{print NF "\t" $0}' fruit.txt

5   peach    100   Mar  1997   China
5   Lemon    150   Jan  1986   America
5   Pear     240   Mar  1990   Janpan
5   avocado  120   Feb  2008   china

awk '{print $NF}' fruit.txt

awk '{print $(NF - 1)}' fruit.txt

1997
1986
1990
2008

awk 'NR % 6'        # 打印出了6倍数行之外的其他行
awk 'NR > 5'        # 打印第5行之后内容，类似 `tail -n +6` 或者 `sed '1,5d'`
awk 'NF >= 6'       # 打印大于等于6列的行
awk '/foo/ && /bar/'    # 打印匹配 `/foo/` 和 `/bar/` 的行
awk '/foo/ && !/bar/'   # 打印包含 `/foo/` 不包含 `/bar/` 的行
awk '/foo/ || /bar/'    # 或
awk '/foo/,/bar/'       # 打印从匹配 `/foo/` 开始的行到 `/bar/` 的行，包含这两行

awk '{print FILENAME "\t" $0}' demo1.txt demo2.txt

awk 'BEGIN {print "Start read file"}' /etc/passwd

awk 'BEGIN {print "Start read file"} {print $0}' /etc/passwd

awk 'END {print "End file"}' /etc/passwd
awk 'BEGIN {print "Start read file"} {print $0} END {print "End file"}' /etc/passwd

awk '{msg="hello world"; print msg}' /etc/passwd

awk 'BEGIN {msg="hello world"} {print msg}' /etc/passwd

awk '{a = 12; b = 24; print a + b}' company.txt

+ 加法运算符
- 减法运算符
* 乘法运算符
/ 除法运算符
% 取余运算符

yahoo   100 4500
google  150 7500
apple   180 8000
twitter 120 5000

awk '$3 < 5500 {print $0}' company.txt

awk '$1 == "yahoo" {print $0}' company.txt

< 小于
<= 小于或等于
== 等于
!= 不等于
> 大于
>= 大于或等于
~ 匹配正则表达式
!~ 不匹配正则表达式

awk '{if ($3 < 5500) print $0}' company.txt

This above all: to thine self be true
There is nothing either good or bad, but thinking makes it so
There’s a special providence in the fall of a sparrow
No matter how dark long, may eventually in the day arrival

awk '/There/{print $0}' poetry.txt

There is nothing either good or bad, but thinking makes it so
There’s a special providence in the fall of a sparrow

awk '/t.e/{print $0}' poetry.txt

There is nothing either good or bad, but thinking makes it so
There’s a special providence in the fall of a sparrow
No matter how dark long, may eventually in the day arrival

awk '/^The/{print $0}' poetry.txt

awk '/true$/{print $0}' poetry.txt

awk '/^Th[ie]/{print $0}' poetry.txt

awk '/s[a-z]/{print $0}' poetry.txt

[a-zA-Z]  表示匹配小写的 a 到 z 之间的单个字符，或者大写的 A 到 Z 之间的单个字符
[^a-z]    符号 `^` 在方括号里面表示取反，也就是非的意思，表示匹配任何非 a 到 z 之间的单个字符

/go{2,10}d/   表示字母 "o" 只能可以出现 2次，3次，4次，5次，6次 ... 一直到 10 次
/go{2,}d/     表示字母 "o" 必须至少出现 2 次或着 2 次以上

history | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head

awk '!x[$0]++' <file>

awk 'length>72' file

last | grep -v "^$" | awk '{ print $1 }' | sort -nr | uniq -c