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Tutorial on how to find the maximum value and minimum value average value in c language function
Tutorial on how to find the maximum value and minimum value average value in c language function
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Debian mail server firewall configuration tips
Apr 13, 2025 am 11:42 AM
Configuring a Debian mail server's firewall is an important step in ensuring server security. The following are several commonly used firewall configuration methods, including the use of iptables and firewalld. Use iptables to configure firewall to install iptables (if not already installed): sudoapt-getupdatesudoapt-getinstalliptablesView current iptables rules: sudoiptables-L configuration
How debian readdir integrates with other tools
Apr 13, 2025 am 09:42 AM
The readdir function in the Debian system is a system call used to read directory contents and is often used in C programming. This article will explain how to integrate readdir with other tools to enhance its functionality. Method 1: Combining C language program and pipeline First, write a C program to call the readdir function and output the result: #include#include#include#includeintmain(intargc,char*argv[]){DIR*dir;structdirent*entry;if(argc!=2){
How to implement file sorting by debian readdir
Apr 13, 2025 am 09:06 AM
In Debian systems, the readdir function is used to read directory contents, but the order in which it returns is not predefined. To sort files in a directory, you need to read all files first, and then sort them using the qsort function. The following code demonstrates how to sort directory files using readdir and qsort in Debian system: #include#include#include#include#include//Custom comparison function, used for qsortintcompare(constvoid*a,constvoid*b){returnstrcmp(*(
Debian mail server SSL certificate installation method
Apr 13, 2025 am 11:39 AM
The steps to install an SSL certificate on the Debian mail server are as follows: 1. Install the OpenSSL toolkit First, make sure that the OpenSSL toolkit is already installed on your system. If not installed, you can use the following command to install: sudoapt-getupdatesudoapt-getinstallopenssl2. Generate private key and certificate request Next, use OpenSSL to generate a 2048-bit RSA private key and a certificate request (CSR): openss
How to perform digital signature verification with Debian OpenSSL
Apr 13, 2025 am 11:09 AM
Using OpenSSL for digital signature verification on Debian systems, you can follow these steps: Preparation to install OpenSSL: Make sure your Debian system has OpenSSL installed. If not installed, you can use the following command to install it: sudoaptupdatesudoaptininstallopenssl to obtain the public key: digital signature verification requires the signer's public key. Typically, the public key will be provided in the form of a file, such as public_key.pe
How Debian OpenSSL prevents man-in-the-middle attacks
Apr 13, 2025 am 10:30 AM
In Debian systems, OpenSSL is an important library for encryption, decryption and certificate management. To prevent a man-in-the-middle attack (MITM), the following measures can be taken: Use HTTPS: Ensure that all network requests use the HTTPS protocol instead of HTTP. HTTPS uses TLS (Transport Layer Security Protocol) to encrypt communication data to ensure that the data is not stolen or tampered during transmission. Verify server certificate: Manually verify the server certificate on the client to ensure it is trustworthy. The server can be manually verified through the delegate method of URLSession
How to do Debian Hadoop log management
Apr 13, 2025 am 10:45 AM
Managing Hadoop logs on Debian, you can follow the following steps and best practices: Log Aggregation Enable log aggregation: Set yarn.log-aggregation-enable to true in the yarn-site.xml file to enable log aggregation. Configure log retention policy: Set yarn.log-aggregation.retain-seconds to define the retention time of the log, such as 172800 seconds (2 days). Specify log storage path: via yarn.n
How to configure HTTPS server in Debian OpenSSL
Apr 13, 2025 am 11:03 AM
Configuring an HTTPS server on a Debian system involves several steps, including installing the necessary software, generating an SSL certificate, and configuring a web server (such as Apache or Nginx) to use an SSL certificate. Here is a basic guide, assuming you are using an ApacheWeb server. 1. Install the necessary software First, make sure your system is up to date and install Apache and OpenSSL: sudoaptupdatesudoaptupgradesudoaptinsta
