diff --git a/checkfile.py b/checkfile.py
new file mode 100644
index 0000000..128c341
--- /dev/null
+++ b/checkfile.py
@@ -0,0 +1,62 @@
+# !/usr/bin/python3
+# -*-coding: utf-8-*-
+# by QianFeng.newrain
+#
+'''
+    Welcome QianFeng cloud computing
+    use mail
+    yag().send(to='收件人',
+                subject='邮件主题',
+                contents='邮件内容',
+                attachments='附件')
+'''
+
+import yagmail
+import hashlib
+import os
+
+
+def yag():
+    maild = yagmail.SMTP(
+        user='',
+        password='',
+        host='smtp.163.com',
+        port='465',
+        smtp_ssl=True)
+    return maild.send
+
+
+def md5sum(filelist, mode='r'):
+    hash_list = []
+    for hash in filelist:
+        f = open(hash, mode='r')
+        d = hashlib.md5()
+        for buf in f.read():
+            d.update(buf.encode())
+        hash_list.append({hash: d.hexdigest()})
+    if mode == 'r':
+        return hash_list
+    else:
+        f = open('./hash', 'w')
+        f.write(repr(hash_list))
+        f.close()
+
+if __name__ == '__main__':
+    file = ['/Users/mingwang/Desktop/mail.py',
+            '/Users/mingwang/Desktop/book.py']
+    hash_sum = md5sum(file)
+
+    if os.path.isfile('./hash'):
+        f = open('./hash', 'r')
+        old_list = eval(f.read())
+        n = len(old_list) - 1
+        warning = []
+        while n > -1:
+            if old_list[n] != hash_sum[n]:
+                warning.append(old_list[n])
+            n -= 1
+        print(warning)
+        yag()(to=[''],
+              subject='重要数据篡改',
+              contents=str(warning)
+              )
\ No newline at end of file
diff --git a/dingding.py b/dingding.py
new file mode 100644
index 0000000..b36c091
--- /dev/null
+++ b/dingding.py
@@ -0,0 +1,32 @@
+#!/usr/bin/python3
+#-*-coding: utf-8-*-
+# by QianFeng.newrain
+#
+'''
+    Welcome QianFeng cloud computing
+'''
+import requests
+import json
+import sys
+import os
+import datetime
+import sys
+headers = {'Content-Type': 'application/json;charset=utf-8'}4
+# 需要修改，钉钉群助手中获取
+api_url = ""
+def msg(text):
+    json_text= {
+     "msgtype": "text",
+        "at": {
+            "atMobiles": [
+                "all"
+            ],
+            "isAtAll": False
+        },
+        "text": {
+            "content": text
+        }
+    }
+    print(requests.post(api_url,json.dumps(json_text),headers=headers).content)
+
+msg("报警"+'\n'+sys.argv[1])
diff --git a/sendmail.py b/sendmail.py
new file mode 100644
index 0000000..696c490
--- /dev/null
+++ b/sendmail.py
@@ -0,0 +1,13 @@
+#!/usr/bin/python3
+import yagmail
+import sys
+yag = yagmail.SMTP(
+            user='xxxx@163.com',
+            password='',
+            host='smtp.163.com',  # 邮局的 smtp 地址
+            port='25',       # 邮局的 smtp 端口
+            smtp_ssl=False)
+# ./sendmail.py 收件人 主题 内容
+yag.send(to=sys.argv[1],
+         subject=sys.argv[2],
+         contents=sys.argv[3])
diff --git a/wechat.py b/wechat.py
new file mode 100644
index 0000000..6b2864f
--- /dev/null
+++ b/wechat.py
@@ -0,0 +1,57 @@
+#!/usr/bin/python
+#-*-coding: utf-8-*-
+# by QianFeng.newrain
+#
+'''
+    Welcome QianFeng cloud computing
+    from python2
+'''
+
+import urllib
+import json
+import sys
+import time
+
+# 需要修改 此为企业的ID号
+CorpID = sys.argv[5]
+
+# 需要修改 应用的ID
+Agentid = 1000002
+
+# 需要修改 认证信息，企业ID+认证信息可获取tokent，获取之后向此tokent发送内容
+Secret = sys.argv[4]
+localtime = time.strftime("[%H:%M:%S]", time.localtime())
+class Tencent(object):
+    def __init__(self,user,title,msg):
+        # 格式化输出内容：标题+内容
+        self.MSG = localtime+title+msg
+        self.User = user
+        self.url = 'https://qyapi.weixin.qq.com'
+        self.send_msg = json.dumps({
+            "touser": self.User,
+            "msgtype": 'text',
+            "agentid": Agentid,
+            "text": {'content': self.MSG},
+            "safe": 0
+        })
+    # 获取tokent
+    def get_token(self):
+        token_url = '%s/cgi-bin/gettoken?corpid=%s&corpsecret=%s' % (self.url, CorpID, Secret)
+        token = json.loads(urllib.urlopen(token_url).read())['access_token']
+        return token
+
+    # 发送信息
+    def send_message(self):
+        send_url = '%s/cgi-bin/message/send?access_token=%s' % (self.url,self.get_token())
+        respone = urllib.urlopen(url=send_url, data=self.send_msg).read()
+        x = json.loads(respone.decode())['errcode']
+        if x == 0:
+            print ('Succesfully')
+        else:
+            print ('Failed')
+
+if __name__ == '__main__':
+    # 创建对象
+    send_obj = Tencent(sys.argv[1],sys.argv[2],sys.argv[3])
+    # 调用发送函数
+    send_obj.send_message()
diff --git a/wechat3.py b/wechat3.py
new file mode 100644
index 0000000..dced3e0
--- /dev/null
+++ b/wechat3.py
@@ -0,0 +1,65 @@
+#!/usr/bin/python3
+#-*-coding: utf-8-*-
+# by QianFeng.newrain
+#
+'''
+    Welcome QianFeng cloud computing
+'''
+
+import json
+import sys
+import time
+import requests
+
+# 此为企业的ID号
+CorpID = ''
+
+# 应用的ID
+Agentid = 1000004
+
+# 认证信息，企业ID+认证信息可获取tokent，获取之后向此tokent发送内容
+Secret = ''
+
+localtime = time.strftime("[%H:%M:%S]", time.localtime())
+class Tencent(object):
+    def __init__(self,user,title):
+        import subprocess
+        a=subprocess.getoutput("free -h |awk 'NR==2{print $4}'")
+        b=subprocess.getoutput("df -Th |awk 'NR==2{print $5}'")
+        c= subprocess.getoutput("uptime |awk -F ':' '{print $NF}'")
+        msg =a+b+c
+        # 格式化输出内容：标题+内容
+        self.MSG = f'{title}\n{msg}\n{localtime}'
+        self.User = user
+        self.url = 'https://qyapi.weixin.qq.com'
+        self.send_msg = json.dumps({
+            "touser": self.User,
+            "msgtype": 'text',
+            "agentid": Agentid,
+            "text": {'content': self.MSG},
+            "safe": 0
+        })
+    # 获取tokent
+    def get_token(self):
+        token_url = '%s/cgi-bin/gettoken?corpid=%s&corpsecret=%s' % (self.url, CorpID, Secret)
+        r = requests.get(token_url)
+        r = r.json()
+        token = r['access_token']
+        return token
+
+    # 发送信息
+    def send_message(self):
+        send_url = '%s/cgi-bin/message/send?access_token=%s' % (self.url,self.get_token())
+        respone = requests.post(url=send_url, data=self.send_msg)
+        respone = respone.json()
+        x = respone['errcode']
+        if x == 0:
+            print ('Succesfully')
+        else:
+            print ('Failed')
+
+if __name__ == '__main__':
+    # 创建对象
+    send_obj = Tencent('xxxxx','我就是我，不一样的烟火')
+    # 调用发送函数
+    send_obj.send_message()
\ No newline at end of file
diff --git a/文件下载.py b/文件下载.py
new file mode 100644
index 0000000..cf4c7d6
--- /dev/null
+++ b/文件下载.py
@@ -0,0 +1,31 @@
+import requests
+import tqdm as tqdm
+import os
+
+url = 'http://mirrors.163.com/centos/8.3.2011/isos/x86_64/CentOS-8.3.2011-x86_64-boot.iso'
+def download(url):
+    filename = url.split('/')[-1]
+    total_size = int(requests.head(url).headers['Content-Length'])
+    if os.path.exists(filename):
+        file_size = os.path.getsize(filename)
+        if file_size < total_size:
+            print('断点续传中。。。')
+        elif file_size == total_size:
+            print('文件已存在')
+            exit(0)
+    else:
+        file_size = 0
+
+    header = {'Range': 'bytes=%s-%s' % (file_size, total_size)}
+    t = tqdm.tqdm(total=total_size, desc=filename, initial=file_size, unit='B', unit_scale=True)
+    result = requests.get(url, headers=header, stream=True)
+
+    with open(filename, 'ab') as f:
+        for i in result.iter_content(chunk_size=1024):
+            f.write(i)
+            t.update(1024)
+        t.close()
+
+if __name__ == '__main__':
+    url = 'http://mirrors.163.com/centos/8.3.2011/isos/x86_64/CentOS-8.3.2011-x86_64-boot.iso'
+    download(url)
\ No newline at end of file
diff --git a/文件下载2.py b/文件下载2.py
new file mode 100644
index 0000000..37e0c19
--- /dev/null
+++ b/文件下载2.py
@@ -0,0 +1,51 @@
+from alive_progress import alive_bar
+import math
+import requests
+import os
+
+
+class Download():
+    def __init__(self, urlPath=None):
+        self.urlPath = urlPath
+        self.filename = urlPath.split('/')[-1]
+        self.header = {
+            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36'
+        }
+
+    def download(self):
+        self.header['Range'] = 'bytes=%s-%s' % (self.fileSize, self.totalSize)
+        self.result = requests.get(url=self.urlPath, headers=self.header, stream=True)
+
+
+    def progress(self):
+        with alive_bar(total=math.ceil((self.totalSize - self.fileSize) / 1024), title=self.filename, title_length=10, force_tty=True) as bar:
+            with open(self.filename, 'wb') as f:
+                for i in self.result.iter_content(chunk_size=1024):
+                    f.write(i)
+                    bar()
+
+    def checkPath(self):
+        self.totalSize = int(requests.head(url=self.urlPath, headers=self.header).headers['Content-Length'])
+        if os.path.exists(self.filename):
+            self.fileSize = os.path.getsize(self.filename)
+            if self.fileSize < self.totalSize:
+                print(f'文件{self.filename}断点续传中')
+            else:
+                print('文件已存在')
+                return ''
+        else:
+            self.fileSize = 0
+
+    def run(self):
+        self.checkPath()
+        self.download()
+        self.progress()
+
+if __name__ == '__main__':
+    with open('./url.txt','r') as f:
+        urls = f.read().splitlines()
+        for url in urls:
+            if not url:
+                continue
+            s = Download(urlPath=url)
+            s.run()