How to Run a Command Multiple Times in Linux
For one reason or the other, you may wish to run a command repeatedly for several times in Linux. This guide will discuss some of the common and effective ways to achieve just that. Let’s consider the first method. Note that if you intend to run a co
Jul 02, 2025 am 09:47 AM
How to Run a Linux Command Without Saving It in History
By default, every command that you execute on your terminal is stored by the shell (command interpreter) in a certain file called a history file or shell command history. In Bash (the most popular shell on Linux systems), by default, the number of co
Jul 02, 2025 am 09:44 AM
Graylog: Industry Leading Log Management for Linux
The point of logging is to keep your servers happy, healthy, and secure. If you can’t find the data, you can’t use it effectively or efficiently. If you’re not logging what you need, you will miss some critical signs. Meanwhile, if you’re log
Jul 02, 2025 am 09:31 AM
How to Install Icinga2 on RHEL, Rocky and AlmaLinux
Icinga2 is a feature-rich open-source network monitoring and alerting application that is a fork of the Nagios monitoring tool. It was built to address the shortcomings of Nagios and introduce new features such as an improved and modern user interfac
Jul 02, 2025 am 09:26 AM![Installation and Review of Qubes Linux [Lightweight Distro]](https://img.php.cn/upload/article/001/242/473/175141951361539.png?x-oss-process=image/resize,m_fill,h_135,w_240)
Installation and Review of Qubes Linux [Lightweight Distro]
This article will talk about the installation and setup process of Qubes Linux. It will also talk about how to test and evaluate the security features of Qubes Linux. Finally, it will offer a brief overview of its advantages and disadvantages, as wel
Jul 02, 2025 am 09:25 AM
How to Install Slack Messaging Tool in Linux
Slack is a modern, popular, feature-rich, flexible, and secure business communication and collaboration platform. It’s an enterprise-grade tool that ships with numerous features including channels, direct messaging, huddles and clips, and Slack conne
Jul 02, 2025 am 09:14 AM
Installation and Review of Linux Mint 20.3 XFCE
Treating yourself to a new Linux Mint ‘Una‘ installation or you’re seeking your first foray into the world of Ubuntu-based Linux, then you couldn’t possibly go wrong with this flavor of Linux Mint running XFCE with a slew of bundled applicati
Jul 02, 2025 am 09:12 AM
How to extract a .tar.gz or .zip file?
Decompress the .zip file on Windows, you can right-click to select "Extract All", while the .tar.gz file needs to use tools such as 7-Zip or WinRAR; on macOS and Linux, the .zip file can be double-clicked or unzip commanded, and the .tar.gz file can be decompressed by tar command or double-clicked directly. The specific steps are: 1. Windows processing.zip file: right-click → "Extract All"; 2. Windows processing.tar.gz file: Install third-party tools → right-click to decompress; 3. macOS/Linux processing.zip file: double-click or run unzipfilename.zip; 4. macOS/Linux processing.tar
Jul 02, 2025 am 12:52 AM
What are Linux runlevels?
The Linux running level is the system-defined operational state used to control the running services and processes. There are 7 operating levels (0 to 6), which correspond to different system states: 0 is shutdown, 1 is single-user mode, 2 is multi-user mode without GUI, 3 is complete multi-user mode with network, 4 is custom mode, 5 is normal operation state with GUI, and 6 is restart. Modern Linux distributions use systemd instead of traditional run-levels, but with similar concepts. The current running level can be viewed through runlevel or systemctlget-default, and the level can be switched through init or systemctlisolate, which usually requires root permission. The operation level is in troubleshooting,
Jul 02, 2025 am 12:45 AM
What is the role of Jenkins in a CI/CD pipeline?
JenkinsautomatesandmanagestheCI/CDpipelinebytriggeringbuilds,orchestratingtesting,enablingdeployment,andprovidingvisibility.First,itautomaticallystartsabuildwhennewcodeispushedtoversioncontrolsystemslikeGit,pullingcodeandusingtoolslikeMavenornpmtocom
Jul 02, 2025 am 12:44 AM
What does set -e do in a shell script?
In shell scripts, the purpose of set-e is to make the script stop running immediately when any command execution fails (returns to a non-zero status code). By default, the Bash script continues to execute subsequent commands, even if a command has failed, which can cause errors to accumulate or produce unexpected results. After using set-e, the script will terminate at the first failed command. For example, the script will stop after executing the false command, and subsequent commands will not run. However, set-e is not completely reliable, with some exceptions: 1. The command in the if condition will not trigger the exit; 2. The command followed by ||true will not cause the script to exit; 3. The exit will only be triggered if the last command in the pipeline command fails. To enhance script robustness, it can be combined
Jul 02, 2025 am 12:43 AM
How to update my Linux system?
When updating Linux systems, several key points need to be paid attention to to ensure safety and comprehensiveness. First, use a suitable package manager to update the system, such as Debian/Ubuntu for apt, Fedora/RHEL/CentOSStream for dnf/yum, ArchLinux for pacman, and follow the process of updating the source list first and then upgrading the software package; second, check and update the kernel regularly, especially in manual management or rolling update distributions, and pay special attention to the kernel version, and restart the system after update; third, keep the software source clean and effective, check the source address availability, replace it with a domestic mirror source if necessary and execute the update command; finally, you can optionally enable the automatic update function, such as Ubuntu for installation of u
Jul 02, 2025 am 12:41 AM
What is a Jenkinsfile and what are its advantages?
AJenkinsfileimprovespipelinemanagementbyenablingversion-controlled,reusable,andauditableCI/CDworkflows.1)Itallowspipelinestobedefinedascode,ensuringconsistencyacrossteamsandenvironments.2)Changesaretracked,peer-reviewed,andreversiblethroughsourcecont
Jul 02, 2025 am 12:37 AM
How to monitor the health of a Kubernetes cluster?
Monitoring the health of Kubernetes clusters requires real-time information from multiple dimensions and quickly responding to exceptions. 1. Monitor the node status and resource usage, check whether the node is Ready and resource bottlenecks such as CPU and memory through tools such as kubectl and Prometheus, and set alarm rules and periodically check event logs; 2. Check the status of the pod and containers, use kubectl to see if the Pod is in an abnormal state, analyze the causes of errors in combination with the log system, and configure probes to ensure the health of the container; 3. Observe the running status of the control plane components, check the Pod and system logs in the kube-system, or use the health panel provided by the hosting service; 4. Use visual tools such as Promethe
Jul 02, 2025 am 12:35 AM
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