What is the difference between monitoring and alerting?
Monitoringandalertingaredistinctbutcomplementarysystemmanagementpractices.1)Monitoringinvolvescontinuousdatacollection—likeCPUusageorresponsetimes—throughtoolslikePrometheustotrackperformancetrends,plancapacity,andidentifypotentialissuesbeforetheyesc
Jun 23, 2025 am 12:17 AM
What is the difference between a terminal, a console, and a shell?
The shell is a command interpreter, responsible for processing the commands entered by the user; the terminal is an application that accesses the shell, such as Terminal.app or GNOMETerminal; the console may be the main terminal of the system or the code log output interface depending on the context. Specifically: 1. Shell is a program that actually processes commands, such as Bash, Zsh, and Fish. Each shell has its own characteristics and syntax and can be switched; 2. The terminal is an interactive interface simulated by software, used to run shell commands; 3. In system management, console refers to the terminal device that directly connects to the machine, and in web development, it refers to the interface where the code outputs logs, such as console.log().
Jun 23, 2025 am 12:17 AM
What is the difference between ps aux and ps -ef?
The main difference between psaux and ps-ef is the output format and displayed fields: psaux provides more detailed resource usage information, including user, CPU and memory usage percentage, virtual and resident memory size, process status and startup commands; ps-ef uses traditional BSD format to display UID, PID, PPID, CPU utilization, startup time, terminal, cumulative CPU time and commands. If you need to view memory or CPU usage, psaux is preferred; if you need to analyze process dependencies or write scripts, ps-ef or its customization options are more suitable.
Jun 23, 2025 am 12:14 AM
How to configure a static IP address on Ubuntu or CentOS?
How to configure static IP addresses on Ubuntu and CentOS? 1. In Ubuntu, use the netplan configuration file, edit the YAML file under /etc/netplan/, set dhcp4:no, addresses, gateway4 and nameservers, and then run sudonetplanapply. 2. In CentOS, you can use the nmcli command to set ipv4.methodmanual and related parameters and activate the connection; or manually edit the /etc/sysconfig/network-scripts/ifcfg-file and configure BOOTPROTO=stat
Jun 23, 2025 am 12:11 AM
How to check the kernel version and distribution information?
To view kernel version and system release information, you can use the following methods: 1. View kernel version: Enter uname-r to obtain the current kernel version, or use uname-a to obtain more detailed information; 2. View system release information: display the distribution name and version number through cat/etc/os-release, or use lsb_release-d (for Debian/Ubuntu series), and RedHat series can use cat/etc/redhat-release; 3. Under the graphical interface, you can find system version information in "Settings" or "About this machine", or you can obtain more comprehensive data in combination with terminal commands. These steps ensure accurate in different Linux distributions
Jun 23, 2025 am 12:10 AM
How to check if a file or directory exists in a script?
Check whether the existence of a file or directory can be implemented in different languages. 1. Use [-f file path] or [-d directory path] in Bash to judge, pay attention to the use of spaces and quotes; 2. Python recommends the pathlib module, handled by exists(), is_file(), and is_dir() methods; 3. Other languages ??such as PowerShell use Test-Path, Node.js uses fs.existsSync, and Ruby uses File.exist?, and the core logic is to call the system interface to judge the path status, so you need to pay attention to the boundary situation such as permissions and path format.
Jun 23, 2025 am 12:08 AM
Windows 11 Is Getting a New Customization Option
After years of Windows 11 being the most rigid thing since DOS in terms of customization, it looks like Microsoft is now making changes a priority with the upcoming Windows 11 25H2 update. Complaining works. Now, things are getting even more flexible
Jun 22, 2025 pm 09:07 PM
How to Type the Upside Down Question Mark on Mac ?
Many individuals who use Mac devices and are either multilingual or studying a new language may find themselves needing to input the upside-down question mark.This punctuation, known as the inverted question mark, appears in Spanish and several other
Jun 22, 2025 am 10:17 AM
How to Fix OneDrive Stuck on Processing Changes
OneDrive is generally a dependable cloud storage solution, but you may sometimes run into the annoying problem of OneDrive getting stuck on processing changes. This usually happens when the sync operation is interrupted or runs into conflicts. After
Jun 22, 2025 am 10:10 AM
Fix iCloud Errors & “Can’t Establish Secure Connection with idmsa.apple.com” on MacOS Sierra & High Sierra
Some users of Mac computers running MacOS Sierra and MacOS High Sierra have reported issues when trying to log in to an Apple ID or iCloud via System Preferences, as well as problems accessing iCloud.com using Safari. In addition, Safari fails to loa
Jun 22, 2025 am 10:06 AM
7 of the Best iOS 16 Features to Check Out Right Away
iOS 16 is now available for iPhone users, offering a solid update packed with practical features you're sure to enjoy.The most noticeable and exciting addition is the ability to personalize your lock screen. However, there are also plenty of smaller
Jun 22, 2025 am 09:56 AM
Tap to Click Not Working on Mac? Here’s How to Fix It
Tap to Click is a widely used feature for Mac trackpads that allows users to tap the trackpad surface to simulate a click, instead of pressing down physically on the trackpad. Many Mac users enjoy using Tap to Click, so it’s understandable if you fee
Jun 22, 2025 am 09:46 AM
How to Use the Gender Neutral Siri Voice
Siri now offers a non-binary, gender-neutral voice option for users who prefer a voice that doesn’t align with traditional male or female tones.Although Apple recently stopped labeling Siri voices with gender identifiers, instead naming them “Voice 1
Jun 22, 2025 am 09:31 AM
How to Create Local Backups of Notes on Mac
The Notes app is widely used for storing bits of information, writing down notes, managing lists, and saving text or images. It’s understandable to want to create a local backup of your Notes data, but you might not be sure how to proceed.We’ll go ov
Jun 22, 2025 am 09:27 AM
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