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Technical Articles

Operation and Maintenance

How Debian handles old files after system updates

How to deal with old files after the Debian system is upgraded? This article will introduce you in detail the old file processing mechanism after the Debian system is updated, including automatic cleaning, backup and recovery, and the use of related commands. 1. Automatic cleaning mechanism Debian13 version optimizes the processing of temporary files: /tmp directory: Use the tmpfs file system, all files are stored in volatile memory, and will be automatically cleared after the system restarts, improving performance and reducing storage wear. /var/tmp directory: The systemd service will automatically delete old files that have been over 30 days, preventing temporary files from occupying storage space for a long time. 2. Backup and Recovery To ensure data security, it is recommended to back up important data before the system is upgraded. You can use c

Apr 12, 2025 pm 10:39 PM

系统升级

How to optimize disk space utilization in Debian

This article introduces a variety of ways to optimize the disk space of Debian systems to help you free up valuable storage space. 1. Analysis of disk space usage First, use the following command to understand disk space usage: lsblk: View block device information. df-h: View disk partition usage (displayed in human-readable format). 2. Clean useless files and directory temporary files: Delete temporary files in the /tmp directory (operate with caution and make sure there are no important files). Log file cleaning: Delete expired log files in /var/log directory. Use the du-sh/path/to/directory command to view the disk usage of the specified directory for more targeted cleaning.

Apr 12, 2025 pm 10:36 PM

工具数据丢失

How to prevent data loss and recycling in Debian

In Debian systems, preventing data loss and recycling can be achieved through the following methods: Data backup is used to back up the entire system using the tar command: a compressed backup containing the entire system files, configuration files and user data can be created. Incremental backup using rsync command: rsync is a fast and flexible backup tool that supports both local and remote backups, suitable for periodic backups and synchronized files. Use duplicity for encrypted incremental backup: duplicity provides incremental backup with encryption function to ensure the security of backup data. Use C

Apr 12, 2025 pm 10:33 PM

工具数据丢失

What is the impact of Debian Apache logs on SEO

The DebianApache log records all access requests to the website, including detailed information such as IP address, request type, response status, etc. These logs have the following impacts on SEO: The importance of Apache logs to SEO Monitor website traffic and user behavior: By analyzing Apache access logs, you can understand how users interact with the website, including the pages they visit, the access time, the devices they use, etc. This information helps optimize website content and structure and improve search engine rankings. Identify potential security threats: Access logs can help identify unauthorized

Apr 12, 2025 pm 10:30 PM

python apache

Where to view the logs of Tigervnc in Debian system

In Debian systems, the log files of the Tigervnc server are usually stored in the .vnc folder in the user's home directory. The log file name is similar to xf:1.log, where xf:1 represents the display number and desktop environment. To view the log, you can use the following method: Method 1: Use the cat command to view the log content directly: cat~/.vnc/xf:1.log Method 2: Use a text editor (such as nano) to open the log file: nano~/.vnc/xf:1.log Please note that xf:1 may vary depending on your system configuration, and you may need to modify the file name according to the actual situation. If xf:1.log is not found, try to find it

Apr 12, 2025 pm 10:27 PM

How to detect Nginx SSL status on Debian

To detect the SSL status of Nginx on the Debian system, you can use the following methods: Use the Nginx command line tool: Open the terminal and enter the following command to check whether the SSL configuration of Nginx is correct: sudonginx-t-c/etc/nginx/nginx.conf This command will test whether the syntax of the Nginx configuration file is correct and will display SSL-related information. View the Nginx status page: If you enable the status module (ngx) in the Nginx configuration

Apr 12, 2025 pm 10:24 PM

nginx 浏览器 access 工具 ai

How does Tigervnc perform on Debian

Tigervnc demonstrates excellent performance on Debian systems and is an actively maintained and efficient VNC server, which is very suitable for remote desktop control needs. Its performance advantages are reflected in the following aspects: Tigervnc's performance advantages on Debian. The efficient RFB protocol: Tigervnc is built on the remote frame buffering protocol (RFB), which achieves real-time and smooth remote desktop interaction by efficiently transmitting screen image updates and user input instructions. Robust client-server architecture: The server side runs on the Debian system, responsible for screen sharing and command reception; the client is connected to the server side through the network for remote operation, and the architecture is stable and reliable. Flexible network connection:

Apr 12, 2025 pm 10:21 PM

电脑

How to monitor Nginx SSL performance on Debian

This article describes how to effectively monitor the SSL performance of Nginx servers on Debian systems. We will use NginxExporter to export Nginx status data to Prometheus and then visually display it through Grafana. Step 1: Configuring Nginx First, we need to enable the stub_status module in the Nginx configuration file to obtain the status information of Nginx. Add the following snippet in your Nginx configuration file (usually located in /etc/nginx/nginx.conf or its include file): location/nginx_status{stub_status

Apr 12, 2025 pm 10:18 PM

linux git nginx access 工具 igs

Which operating systems are supported by Tigervnc in Debian

The open source VNC tool Tigervnc is compatible with a wide range of operating systems, including Windows, Linux, and macOS. This article will introduce in detail the application of Tigervnc on the Debian system. Tigervnc is integrated in the application system of Debian system: In the Debian system, Tigervnc is integrated into the system as a VNC server component. Users can start VNC services through command line tools such as vncserver and customize display settings such as resolution and color depth. Cross-platform connection: Tigervnc client supports Windows, Linux, and macOS, which means users can run this from any

Apr 12, 2025 pm 10:15 PM

linux windows 操作系统工具 macos cos

How to filter log information in Debian Syslog

Debian system uses Syslog to record system events. This article introduces three methods to filter DebianSyslog log information: Method 1: Use the grep command to filter log files. The grep command can be used to search for specific keywords or patterns in log files. For example, find lines containing "error" in /var/log/syslog: grep'error'/var/log/syslog uses regular expressions and grep options to achieve more precise filtering. Method 2: Use the journalctl command to filter logs systemd to manage logs using journald. journalctl command is used for querying

Apr 12, 2025 pm 10:12 PM

How to scale a Debian Hadoop cluster

This article introduces how to expand the DebianHadoop cluster, mainly covering two ways: dynamic capacity expansion (add nodes) and dynamic capacity reduction (removal nodes). 1. Dynamic expansion: Add new node configuration modification: Modify hdfs-site.xml on the NameNode node, add the dfs.hosts attribute, list the network addresses of all DataNode nodes that are allowed to connect; modify yarn-site.xml on the ResourceManager node, add the yarn.resourcemanager.nodes.include-path attribute, list the network addresses of all NodeManager nodes that are allowed to connect. New Festival

Apr 12, 2025 pm 10:09 PM

操作系统系统版本

How to monitor debian mail server

To ensure that your Debian mail server runs stably, an effective monitoring mechanism is required. This article introduces several monitoring methods, including log checking, monitoring tools and alarm system settings. 1. Log monitoring The log files of the Debian mail server are usually located in the /var/log/ directory, such as /var/log/mail.log. Regularly checking these logs can help you identify potential problems in a timely manner. 2. Monitoring tools and script examples The following provides several Bash script examples for monitoring CPU, memory and disk space usage and sending email alarms: 1. CPU usage monitoring: #!/bin/bashTHRESHOLD=80EMAILS="your_emai

Apr 12, 2025 pm 10:06 PM

工具 ai 邮箱日志监控

How to test Debian Hadoop

This article guides you to install and test ApacheHadoop on your Debian system. The following steps will provide detailed description of the configuration process and verification methods. Step 1: Install Java to ensure that the system has Java 8 or higher installed. Use the following command to install OpenJDK8: sudoaptupdatesudoaptininstallopenjdk-8-jdk Verification Installation: java-version Step 2: Download and decompress Hadoop Download the latest version of Hadoop from the ApacheHadoop official website and decompress to the specified directory (for example /usr/local/hadoop

Apr 12, 2025 pm 10:03 PM

apache red

How to do Debian Hadoop monitoring

This article introduces a variety of methods and tools to monitor Hadoop clusters on Debian systems to help you effectively manage cluster performance and stability. Hadoop comes with monitoring tools: HadoopAdminUI: Access the HadoopAdminUI interface through the browser to intuitively understand the cluster status and resource utilization. HadoopResourceManager: Access the ResourceManager WebUI (usually http://:8088) to monitor cluster resource usage and job status. HadoopNameNode: Access NameNodeWebUI (usually http://

Apr 12, 2025 pm 10:00 PM

apache 浏览器工具 red

How to back up Debian Hadoop data

Ensuring the security and availability of Hadoop data in Debian systems is crucial. This article introduces several commonly used Hadoop data backup methods to help you choose the most suitable solution. Hadoop data backup strategy You can back up Hadoop data by following the following methods: HDFS data manually copying: Use the Hadoop command line tool to directly copy HDFS data from the source directory to the backup directory. For example: hadoopfs-cphdfs://localhost:9000/source path hdfs://localhost:9000/backup path HadoopDistCp:DistCp(Distribu

Apr 12, 2025 pm 09:57 PM

工具 red