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Why I Always Have Two Computer Mice on My Desk

Most people get by with one mouse without ever considering a second, but for me, having two is a must. It’s become an essential part of how I game on PC, and I’d even be willing to add a third for productivity purposes. Why

How To Make a Portable SSD Backup Drive

How to Buy Used Computer Hardware Without Getting Scammed

With so many games to play, there's never been a better time to build a gaming PC. However, with the high cost of new hardware, it's hard to justify the price, especially when second-hand options are often much cheaper. The only problem? Avoiding pot

MSI's Toy Story PC Is a Nostalgic Treat

Complementing the motherboard is the graphics card, an RTX 5070, which adopts the vibrant color scheme of Buzz Lightyear. The card showcases a striking white and green design, mirroring the space ranger outfit worn by Buzz. This ensures that the most

Microsoft's 'Mu' Will Power More Windows 11 Improvements

The Mu model is currently being implemented in the search bar of the Windows 11 settings app, which was recently made available to Windows Insiders on Snapdragon PCs. It can interpret queries such as “how to control my PC by voice” or “my mouse point

How to see all currently running processes?

The method of viewing running processes in Windows or macOS is as follows: 1. Use the Task Manager on Windows (right-click the taskbar or Ctrl Shift Esc to open), switch to the "Process" tab, you can view and sort the CPU and memory usage, and right-click to end the process; 2. macOS uses the Activity Monitor (located in Application → Utility), displays all processes and provides multi-dimensional resource monitoring, click the "X" button to force exit the process; 3. Advanced users can operate through the command line: enter Get-Process on Windows, and use psaux or top to view the process list. All of the above methods can help users understand the use of system resources

What is iptables and how do you use it to configure a firewall?

Iptables is a powerful firewall tool in Linux systems, which controls network traffic in and out of the system by setting IP packet filtering rules. 1. It matches and processes data packets based on rule chains (INPUT, OUTPUT, FORWARD). The default policy is usually set to DROP to improve security. 2. When setting basic rules, you should first allow key services such as SSH, HTTP and HTTPS, and then block all other input traffic. 3. Use iptables-save and iptables-restore to achieve rule persistence. 4. Use -L-n-v to view rules, and delete or insert rules can be specified by line number. 5. Common uses include blocking suspicious IPs and allowing connections

How to troubleshoot DNS resolution problems on a Linux server?

When encountering DNS resolution problems, first check whether the /etc/resolv.conf file configuration is correct, use nslookup or dig to test DNS query, troubleshoot whether the local DNS cache service is abnormal, and confirm whether the firewall and network connections limit DNS. Check whether the /etc/resolv.conf file has the correct nameserver configuration, manually modify or use resolvectl settings if necessary; use nslookup or dig to determine whether the request is issued or the server responds, and specify DNS testing; check the status of cache services such as systemd-resolved or nscd, and restart or clear the cache if necessary; finally check whether the firewall rules are blocked

What is Helm and why is it used?

HelmisthepackagemanagerforKubernetesthatsimplifiesapplicationdeploymentbyorganizingYAMLmanifestsintoreusable,versionedcharts.Itallowsuserstoinstallentireapplicationswithasinglecommand,versiondeploymentsforeasyrollbacks,andcustomizeconfigurationsusing

How to use ssh to connect securely to a remote server?

1. To securely connect to the remote server using SSH, you need to generate a key pair and configure the client and server. First, execute ssh-keygen to generate the key and set passphrase protection, add the public key to the server authorized_keys file to achieve password-free login; 2. Use ~/.ssh/config to configure alias and enable connection reuse to improve connection efficiency; 3. Modify sshd_config to prohibit root login, turn off password authentication, and restrict logged in users to enhance security; 4. When connecting to an intranet server, you can transfer through the springboard machine through the -J parameter or ProxyJump configuration. Properly managing keys and optimizing configuration ensures that SSH connections are both convenient and secure.

How to analyze web server logs (e.g., Apache, Nginx) for errors?

Analyzing Web server logs is an important way to troubleshoot website problems, optimize performance and ensure security. 1. First confirm the log path and format. The default Apache path is /var/log/apache2/error.log or /var/log/httpd/error_log. The Nginx error log is usually in /var/log/nginx/error.log; 2. Pay attention to common error status codes such as 4xx (client error) and 5xx (server error). For example, 404 means that the resource does not exist, 500 means that the internal server error is error; 3. Use command line tools to quickly screen the logs, such as tail to view real-time errors, awk statistics IP and error codes; 4.

How to use the find command to locate files by name, size, or modification time?

The find command is used in Linux or macOS to find files according to file name, size, modification time and other conditions. 1. Search by file name: Use the -name parameter to match the complete or partial file names, support wildcards and regular expressions, and -name ignores case; 2. Search by file size: Locate files by the -size parameter in combination with units (c/k/M/G), such as 100M represents files larger than 100MB; 3. Search by modification time: -mtime (content modification), -atime (access time), and -ctime (status change) can filter files by number of days, supporting combination conditions. Mastering these basic usages can efficiently handle file tasks.

What is the PATH environment variable and how do you modify it?

ThePATHenvironmentvariabletellstheoperatingsystemwheretolookforexecutableprogramswhenrunningcommandsfromtheterminal.1.Itcontainsalistofdirectoriesseparatedbycolons(onUnix-likesystems)orsemicolons(onWindows).2.Whenyouenteracommand,thesystemsearchesthe

What are best practices for writing maintainable shell scripts?

Five key points are required to write a maintainable shell script: 1. Declare the interpreter at the beginning and enable the set option to improve robustness; 2. Use meaningful variables and function names to enhance readability; 3. Add comments reasonably and use getopts to process parameters to improve usability; 4. Separate configuration and logic for easy adjustment; 5. Modular functions improve reusability and structural clarity. Each shell script should start with #!/bin/bash or #!/bin/sh, and discover problems early through set-e, set-u and set-opipefail; avoid fuzzy variable names such as a when naming, and it is recommended to use log_file and other names that clearly express the intention; functions such as backup_config() can be added