What is Terraform and how does it differ from Ansible?
Terraform is an infrastructure-as-code tool for declaratively creating and managing infrastructure across cloud platforms; Ansible is a configuration management tool for automated configuration after the server runs. 1.Terraform defines the expected infrastructure state in a declarative manner, which is suitable for building an environment from scratch or large-scale changes; 2.Ansible performs tasks through YAML scripts, which is suitable for deploying applications, installing software and maintaining system state; 3.Terraform maintains state file tracking resources, while Ansible checks and implements configurations every time it runs; 4. The two are often used in combination: Terraform builds the infrastructure first, and Ansible then configures it.
Jun 26, 2025 am 12:32 AM
How to debug a shell script?
The key methods for debugging shell scripts include: 1. Use set-x or bash-x to view execution details. You can add set-x or runtime parameters at the beginning of the script to display each execution command and its parameters to help locate problems; 2. Check whether the variable is empty or assigned errors, print the variables through echo, use ${VAR_NAME:?} to force check whether the variable exists, and pay attention to the correct use of quotes to avoid parsing errors; 3. Add error handling logic to improve robustness, if you encounter errors with set-e, exit immediately, combine the trap command to clean or record, and add judgments to handle exceptions on important commands; 4. Use the shellcheck tool to discover potential problems in advance, and run shellch after installation.
Jun 26, 2025 am 12:30 AM
How to troubleshoot a 'disk space full' issue?
If the disk space is full, it can be solved by cleaning temporary files, uninstalling software, checking large files, and moving data. First, use the disk cleaning tool or run %temp% to delete temporary files; second, uninstall infrequently used software in the control panel and deeply clean up residues; then, use WinDirStat and other tools to find and delete large and duplicate files; finally, migrate the data to other partitions, external devices or cloud disks to free up system disk space, and regular maintenance can prevent the problem from worsening.
Jun 26, 2025 am 12:30 AM
What is the difference between an absolute and a relative path?
Themaindifferencebetweenabsoluteandrelativepathsliesintheirstartingpoint.Anabsolutepathspecifiesthefulllocationofafileorfolder,startingfromtherootdirectory—suchasC:\onWindowsor/onmacOSandLinux—makingituniversallyusableacrossdifferentcontexts.Incontra
Jun 26, 2025 am 12:29 AM
How to see my system's uptime and load average?
If you want to know the running time and load of Linux system, you can use the following methods: 1. Use the uptime command to view the system running time and the average load of nearly 1, 5, and 15 minutes; 2. Use the top or htop tools to dynamically view the real-time load information. It is recommended to install htop to obtain a more friendly interface; 3. Directly read /proc/uptime to get the total number of running seconds and /proc/loadavg to get the load average, which is suitable for script monitoring.
Jun 26, 2025 am 12:27 AM
What is Grafana and how is it used with Prometheus?
Grafana and Prometheus are often used in combination for efficient monitoring and visualization. Prometheus is responsible for collecting and storing time series data, while Grafana provides rich visualization capabilities by connecting Prometheus as a data source. 1. Prometheus actively crawls and stores indicators, 2. Grafana connects Prometheus to build a custom dashboard, 3. Commonly used preset dashboards include monitoring templates such as NodeExporter, Kubernetes, databases, etc. 4. Users can write queries through PromQL and select chart types for display, 5. Optimization suggestions include reasonably configuring crawling targets, avoiding panel overload,
Jun 26, 2025 am 12:22 AM
How to query DNS records using dig and nslookup?
dig and nslookup are common command-line tools for querying DNS records, suitable for network troubleshooting and domain name resolution verification. 1. The usage of dig includes: directly input digexample.com to query A record, use digexample.comMX to view MX records, dig short displays concise results, dig@8.8.8.8example.com to specify the DNS server; 2. The basic usage of nslookup is nslookupexample.com, and A record is displayed by default. Switch query type through settype=MX, and nslookupexample.com8.8.8.8 specifies the DNS server. two
Jun 26, 2025 am 12:22 AM
How to get the logs from a specific Pod in Kubernetes?
The most straightforward way to get logs from a specific Pod in Kubernetes is to use the kubectllogs command. 1. The basic command format is kubectllogs-n. If the Pod contains multiple containers, you need to specify the container name through -c; 2. Use the -f parameter to view the log in real time, such as kubectllogs-fmy-pod-ndev; 3. If the container has been restarted, you can view the historical log through --previous to analyze the cause of the crash; 4. You can view the logs of the latest period in combination with --since, save the logs to the file, or view multiple Pod logs in batches through pipelines and xargs.
Jun 26, 2025 am 12:21 AM
How to run a command at a specific time once using at?
To run a one-time timing task using the at command in Linux, first make sure that the at service is installed and started. 1. Check whether to install: Use which in Debian/Ubuntu and RHEL/CentOS/Fedora; 2. If not installed, install at; 3. Make sure the atd service is running and enable power-on self-start if necessary. The basic syntax is echo "command"|attime or press Ctrl D to end after directly entering the command. Supports a variety of time formats such as now 5 minutes, 10:00AM tomorrow, etc. Use atq to view the task list and use atrm to add task number to cancel the task. Notes include use
Jun 26, 2025 am 12:12 AM
Windows Recall Is Getting Its First Major Update
The updated homepage now highlights the three apps you used most within a 24-hour window, along with the websites you've spent the most time visiting. It will also showcase your snapshots, making it simpler to locate what you need without having to s
Jun 25, 2025 pm 09:03 PM
How to Enable Disappearing Messages in Facebook Messenger
Facebook Messenger now includes a disappearing messages function, which allows your messages to vanish after a certain amount of time has passed.This feature in Facebook Messenger works similarly to the one in WhatsApp — you can enable it individuall
Jun 25, 2025 am 10:51 AM![How to Use cp Command Effectively in Linux [14 Examples]](https://img.php.cn/upload/article/001/242/473/175081969353807.png?x-oss-process=image/resize,m_fill,h_135,w_240)
How to Use cp Command Effectively in Linux [14 Examples]
Brief: In this easy-to-follow guide, we will discuss some practical examples of the cp command. After following this guide, users will be able to copy files and directories easily in Linux using the command line interface. As Linux users, we interact
Jun 25, 2025 am 10:48 AM
Beyond Basics: Unlocking the Power of Advanced Bash Scripting
Bash scripting is often seen as a convenient tool for automating repetitive tasks, managing simple file operations, or orchestrating basic system utilities. But beneath its surface lies a trove of powerful features that allow for complex logic, high-
Jun 25, 2025 am 10:44 AM
How to Add Remote Linux to Nagios Server Using NRPE Plugin
In the first part of the Nagios series article, we’ve explained in detail how to install and configure the latest version of Nagios Core and Nagios Plugins in RHEL-based distributions such as CentOS Stream, Rocky Linux, AlmaLinux, and Fedora. In th
Jun 25, 2025 am 10:42 AM
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