防火墙iptables与firewalld端口转发规则

 未分类  No Responses »
1月 262021
 

iptables示例

sudo iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080
sudo iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 443 -j REDIRECT --to-port 8443

firewalld示例

# allow incoming connections on port 80.
# You can also use --add-service=http instead of adding a port number
sudo firewall-cmd --add-port=80/tcp --permanent
sudo firewall-cmd --permanent \
--add-forward-port=port=80:proto=tcp:toaddr=127.0.0.1:toport=8080

# allow incoming connections on port 443.
# You can also use --add-service=https instead of adding a port number
sudo firewall-cmd --add-port=443/tcp --permanent
sudo firewall-cmd --permanent \
--add-forward-port=port=443:proto=tcp:toaddr=127.0.0.1:toport=8443
sudo firewall-cmd --reload

内容引用：

https://www.jenkins.io/doc/book/system-administration/reverse-proxy-configuration-iptables/

Jenkins update center加速镜像配置

 未分类  No Responses »
1月 262021
 

安装阶段修改配置

[root@jenkins ~]# cd /var/lib/jenkins/
[root@jenkins jenkins]# cat hudson.model.UpdateCenter.xml 
<?xml version='1.1' encoding='UTF-8'?>
<sites>
<site>
<id>default</id>
<url>https://updates.jenkins.io/update-center.json</url>
</site>
</sites>[root@jenkins jenkins]#

[root@jenkins jenkins]# cat hudson.model.UpdateCenter.xml 
<?xml version='1.1' encoding='UTF-8'?>
<sites>
<site>
<id>default</id>
<url>https://mirrors.tuna.tsinghua.edu.cn/jenkins/updates/update-center.json</url>
</site>
</sites>
[root@jenkins jenkins]#

使用阶段修改配置

PyCharm PyPI Mainland China 镜像源

 未分类  No Responses »
1月 052021
  
File -> Settings -> Project -> Python Interpreter -> Install -> Available Packages -> Manage Repositories

https://mirrors.163.com/pypi/simple/
https://mirrors.ustc.edu.cn/pypi/web/simple
https://pypi.tuna.tsinghua.edu.cn/simple
https://mirrors.aliyun.com/pypi/simple/

使用命令行查看当前网络出口公网IP信息

 未分类  No Responses »
12月 242020
  
https://ipinfo.io/developers
C:\Users\harveymei>curl ipinfo.io
{
"ip": "119.137.55.106",
"city": "Shenzhen",
"region": "Guangdong",
"country": "CN",
"loc": "22.5455,114.0683",
"org": "AS4134 CHINANET-BACKBONE",
"timezone": "Asia/Shanghai",
"readme": "https://ipinfo.io/missingauth"
}
C:\Users\harveymei>

Python 3语法学习之练习代码及输出40

 未分类, 程序设计  No Responses »
10月 122020
  
#定义一个创建文件的函数
def create_file():
    path = 'C:/Users/harveymei/Desktop/' #最后一个斜线必须有
    fullname = path + filename + '.txt'
    file = open(fullname, 'w')
    file.close()

#使用for循环调用创建文件函数
for name in range(1,11): #使用range()函数提供1-10序列数值
    filename = str(name) #使用str()函数将整数转换为字符串赋值给变量
    create_file() #循环调用函数，创建10个文件

PS D:\Python> & C:/Users/harveymei/AppData/Local/Programs/Python/Python39/python.exe d:/Python/hello.py
PS D:\Python> ls C:\Users\harveymei\Desktop\


    目录: C:\Users\harveymei\Desktop


Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
-a----        2020/10/12     11:51              0 1.txt
-a----        2020/10/12     11:51              0 10.txt
-a----        2020/10/12     11:51              0 2.txt
-a----        2020/10/12     11:51              0 3.txt
-a----        2020/10/12     11:51              0 4.txt
-a----        2020/10/12     11:51              0 5.txt
-a----        2020/10/12     11:51              0 6.txt
-a----        2020/10/12     11:51              0 7.txt
-a----        2020/10/12     11:51              0 8.txt
-a----        2020/10/12     11:51              0 9.txt
-a----         2020/10/9      9:00           2136 Docker Desktop.lnk
-a----         2020/4/14      8:55           2371 GitHub Desktop.lnk
-a----         2020/8/28     15:20           2312 Kindle.lnk
-a----         2020/8/21     17:59           2255 MockingBot.lnk
-a----        2020/10/10      9:40           2217 Slack.lnk


PS D:\Python>

Python 3语法学习之练习代码及输出32

 未分类  No Responses »
10月 092020
  
#定义密码列表并赋值给变量
password_list = ['*#*#', '12345']
#定义函数
def account_login():
    password = input('Password:') #用户输入赋值变量
    password_correct = password == password_list[-1] #使用列表索引取值进行布尔运算并赋值变量
    password_reset = password == password_list[0]
    if password_correct: #条件成立打印信息
        print('Login success!')
    elif password_reset: #反之，password_reset条件成立（即输入*#*#）
        new_password = input('Enter a new password:') #用户输入赋值变量
        password_list.append(new_password) #列表追加数据
        print('Your password has changed successfully!')
        account_login() #继续调用函数
    else: #反之，打印错误信息
        print('Wrong password or invalid input!')
        account_login()
#调用函数
account_login()

PS C:\Users\harveymei> & C:/Users/harveymei/AppData/Local/Programs/Python/Python39/python.exe c:/Users/harveymei/hello.py
Password:54321
Wrong password or invalid input!
Password:12345
Login success!
PS C:\Users\harveymei> & C:/Users/harveymei/AppData/Local/Programs/Python/Python39/python.exe c:/Users/harveymei/hello.py
Password:*#*#
Enter a new password:hahaha
Your password has changed successfully!
Password:hahaha
Login success!
PS C:\Users\harveymei>

Python 3语法学习之练习代码及输出19

 未分类  No Responses »
9月 232020
  
#自定义函数，a*a+b*b=c*c，开平方求c值
def Pythagorean_theorem(a,b):
    return 'The right triangle third side\'s length is {}'.format((a**2 + b**2)**(1/2))
#引号内的字符串出现符号时需要使用\转义
#使用.format()将格式化的运算值填入字符串中

#调用函数，传入参数并打印函数返回
print(Pythagorean_theorem(3,4))

PS C:\Users\harveymei> & C:/Users/harveymei/AppData/Local/Programs/Python/Python38/python.exe c:/Users/harveymei/hello.py
The right triangle third side's length is 5.0
PS C:\Users\harveymei>
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