sudo apt install iotop
sudo yum install iotop

sudo apt install influxdb

sudo apt install influxdb-client

influx

influx -database 'name'  # 数据库
influx -host 'hostname'  # 默认是 localhost
influx -password 'password' # 如果有密码
influx -port 'port'     # 端口

show databases

create database test
drop database test

use test

show measurements

drop measurement test_table

insert [measurement],[tag],[field],[time]
insert cpu,host=serverA,regin=us value=0.64

insert temperature,machine=unit42,tpye=assembly external=25,internal=37

select "host","region","value" from "cpu"
select * from "temperature"

show users

create user "username" with password "password"
create user "username" with password "password" with all privileges

drop user "username"

pip install influxdb

curl -sL -I localhost:8086/ping

import requests
posturl = 'http://localhost:8086/query'
data = {'q': 'create DATABASE mydb'}
response = requests.post(posturl, data=data)

curl -GET http://localhost:8086/query --data-urlencode "q=CREATE DATABASE mydb"

import requests
posturl = 'http://localhost:8086/write?db=mydb'
data="cpu_load_short,host=server01,region=us-west value=0.69"
response = requests.post(posturl, data=data)

curl -i -XPOST 'http://localhost:8086/write?db=mydb' --data-binary 'cpu_load_short,host=server01,region=us-west value=0.64 '

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import psutil
import time
from influxdb import InfluxDBClient

host = "localhost"
port = 8086
user = "root"
password = "root"
dbname = "test"


def read_info():
    cpu_time_info = psutil.cpu_percent(1, True)
    data_list = [
        {
            'measurement': 'cpu',
            'tags': {
                'cpu': 'i7'
            },
            'fields': {
                'cpu_info_user': cpu_time_info[0],
                'cpu_info_system': cpu_time_info[1],
                'cpu_info_idle': cpu_time_info[2],
                'cpu_info_interrupt': cpu_time_info[3],
                'cpu_info_dpc': cpu_time_info[4]
            }
        }
    ]
    return data_list


def parse_db(dbs):
    l = []
    for db in dbs:
        l.append(db['name'])
    return l


if __name__ == '__main__':
    client = InfluxDBClient(host, port, user, password)  # 初始化
    dbs = client.get_list_database()
    if dbname not in parse_db(dbs):
        client.create_database(dbname)
    for i in range(20):
        client.write_points(read_info())
        time.sleep(2)

import com.jutils.base.RequestData;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.HashMap;
import java.util.Map;
import java.util.TreeMap;

public class WeekCPTest {
	private static String sha1(String str) throws NoSuchAlgorithmException, UnsupportedEncodingException {
		MessageDigest instance = MessageDigest.getInstance("SHA-1");
		byte[] bytes = str.getBytes("UTF-8");
		instance.update(bytes, 0, bytes.length);
		return O000000o(instance.digest());
	}

	private static String O000000o(byte[] bArr) {
		StringBuilder stringBuilder = new StringBuilder();
		for (byte b : bArr) {
			int i = (b >>> 4) & 15;
			int i2 = 0;
			while (true) {
				char c = (i < 0 || i > 9) ? (char) ((i - 10) + 97) : (char) (i + 48);
				stringBuilder.append(c);
				int i3 = b & 15;
				i = i2 + 1;
				if (i2 >= 1) {
					break;
				}
				i2 = i;
				i = i3;
			}
		}
		return stringBuilder.toString();
	}

	public static String makeSign(Map<String, Object> map, Map<String, Object> map2, String str) {
		Map treeMap = new TreeMap();
		if (!(map == null || map.isEmpty())) {
			treeMap.putAll(map);
		}
		if (!(map2 == null || map2.isEmpty())) {
			treeMap.putAll(map2);
		}
		treeMap.remove("token");
		treeMap.remove("sign");
		try {
			return sha1(RequestData.buildQueryString(treeMap, null, false) + str);
		} catch (Exception e) {
			e.printStackTrace();
			return "";
		}
	}



	public static void main(String[] args) {
		HashMap<String, Object> query = new HashMap<>();
		query.put("d", "a");
		query.put("user_id", "5624198");
		query.put("timestamp", "1533102328");
		query.put("sm_device_id", "201807021511598922958a5fbc8a5de09cb9019d34a48b01c51f66d9435c31");
//		query.put("Token", "1576511275532288_5624198_1559013109_58f16d8bd82677acc30d87542f5504b0");

		query.put("start", "80");
		query.put("last_object_id", "1742");
		query.put("keyword", "");
		query.put("num", "20");
		String s = makeSign(query, new HashMap<>(), "025d25f5a69eb2818b6811ff6edb51b4");
		System.out.println(s);
	}
}

def __sha1(self, str):
    m = hashlib.sha1()
    m.update(str)
    return m.hexdigest()

def __sign(self, params, secret_key, data={}):
    """
    通过请求参数和 secret_key 生成 sign
    :param params: 请求参数
    :param secret_key: 加密 key 和 用户绑定，在登录或者刷新 token 中获取
    :return:
    """
    to_sign = ""
    merged_dict = params.copy()
    merged_dict.update(data)
    if "sign" in merged_dict.keys():
        merged_dict.pop("sign")
    if "token" in merged_dict.keys():
        merged_dict.pop("token")
    for key in sorted(merged_dict.iterkeys()):
        value = merged_dict.get(key)
        logger.info("params %s %s" % (key, value))
        pair = str(key) + "=" + str(merged_dict.get(key))
        if to_sign == '':
            to_sign = to_sign + pair
        else:
            to_sign = to_sign + '&' + pair
    return self.__sha1(to_sign + secret_key)

Failed to create bus connection: No such file or directory

sudo apt-get install dbus

sudo apt install dconf-tools

/etc/init.d/services.sh restart

/etc/init.d/container-station.sh restart

/etc/init.d/smb.sh restart

class name<T1, T2, ..., Tn> { /* ... */ }

List<String> list;

public static <K, V> boolean compare(Pair<K, V> p1, Pair<K, V> p2) {...}

boolean same = Util.<Integer, String>compare(p1, p2);
// or
boolean same = Util.compare(p1, p2);

<T extends B1 & B2 & B3>

public static void process(List<? extends Foo> list) { /* ... */ }

public static void printList(List<Object> list) {
    for (Object elem : list)
        System.out.println(elem + " ");
    System.out.println();
}

public static void printList(List<?> list) {
    for (Object elem: list)
        System.out.print(elem + " ");
    System.out.println();
}

public static void addNumbers(List<? super Integer> list) {
    for (int i = 1; i <= 10; i++) {
        list.add(i);
    }
}

class A { /* ... */ }
class B extends A { /* ... */ }

B b = new B();
A a = b;

List<B> listB = new ArrayList<>();
List<A> listA = listB;        // 编译错误

List<? extends Integer> intList = new ArrayList<>();
List<? extends Number>  numList = intList;  // OK. List<? extends Integer> is a subtype of List<? extends Number>

// Counts the number of occurrences of elem in anArray.
//
public static <T> int count(T[] anArray, T elem) {
    int cnt = 0;
    for (T e : anArray)
        if (e.equals(elem))
            ++cnt;
        return cnt;
}

Pair<int, char> p = new Pair<>(8, 'a');  // compile-time error

public static <E> void append(List<E> list) {
    E elem = new E();  // compile-time error
    list.add(elem);
}

public static <E> void append(List<E> list, Class<E> cls) throws Exception {
    E elem = cls.newInstance();   // OK
    list.add(elem);
}

List<String> ls = new ArrayList<>();
append(ls, String.class);

public class MobileDevice<T> {
    private static T os;

    // ...
}

public static <E> void rtti(List<E> list) {
    if (list instanceof ArrayList<Integer>) {  // compile-time error
        // ...
    }
}

public static void rtti(List<?> list) {
    if (list instanceof ArrayList<?>) {  // OK; instanceof requires a reifiable type
        // ...
    }
}

List<Integer>[] arrayOfLists = new List<Integer>[2];  // compile-time error

// Extends Throwable indirectly
class MathException<T> extends Exception { /* ... */ }    // compile-time error

// Extends Throwable directly
class QueueFullException<T> extends Throwable { /* ... */ // compile-time error

class Parser<T extends Exception> {
    public void parse(File file) throws T {     // OK
        // ...
    }
}

public class Example {
    public void print(Set<String> strSet) { }
    public void print(Set<Integer> intSet) { }
}