How to find the parent process ID (PPID) of a process?
To check the parent process ID (PPID) of the process, the method varies from system to system. ① In Unix-like systems, you can use the ps command to query the PPID of the specified PID with the -o parameter, such as ps-oppid=-p; if the process name is unknown, use ps-ef|grep to view the third column PPID; ② By reading the /proc//status file, use cat/proc//status|grepPPid to obtain more stable information; ③ PowerShell can use Get-WmiObject to query the ParentProcessId field, or add the "parent process ID" column to display through the task manager; ④ In terms of programming, in C/
Jul 05, 2025 am 01:03 AM
How to install linux on chromebook
ToinstallLinuxonaChromebook,choosethemethodthatbestfitsyourneeds:usethebuilt-inLinux(Beta)forlightweightdevelopment,CroutonforafulldesktopenvironmentalongsideChromeOS,replaceChromeOSentirelyfordedicatedLinuxuse,orsetupadual-bootsystemforflexibility.T
Jul 05, 2025 am 01:01 AM
What is the difference between df and du commands?
df displays the overall usage of the disk, providing an overview of used and available space; du counts the space usage of specific directories and files. 1.df is used to view the total space, used, remaining and usage percentage of each mounted file system, which is suitable for understanding the overall storage status of the system. 2.du goes deep into the directory structure, helps locate specific files or subdirectories that occupy space, and often simplifies output with options such as -sh. 3. The results of the two may differ due to different processing methods of deleted but not released files, hidden metadata or mount points. Tools such as lsof need to be used to troubleshoot abnormal space occupation.
Jul 05, 2025 am 12:59 AM
How to install Linux alongside Windows 11?
The steps to install dual systems of Linux and Windows 11 are as follows: 1. Reserve at least 20GB of space and create unallocated space through disk management; 2. Back up important data just in case; 3. Use Rufus to create a boot USB flash drive and select a GPT partitioning plan; 4. Enter the BIOS to set the U disk as the first boot item; 5. Select "InstallLinuxalongside Windows 11" during installation to automatically identify unallocated space; 6. If you partition manually, be careful not to delete the Windows partition, and set the root, switch and home directory partition reasonably; 7. Install the boot loader to the main hard disk to ensure that the boot menu is displayed normally; 8. If the boot menu does not appear after installation, you can use Windows
Jul 05, 2025 am 12:45 AM
What is a container and how does it differ from a virtual machine?
The core difference between containers and virtual machines (VMs) is the isolation method and resource usage. 1. The container shares the host system kernel, and achieves process isolation through namespace and cgroups, and is lightweight and fast-start, suitable for microservices and cloud-native applications; 2. The virtual machine simulates a complete computer, including an independent operating system, providing stronger isolation but consumes a lot of resources, suitable for running legacy systems or multi-operating system environments; 3. In actual use, containers, VMs or combinations can be selected according to needs to take into account performance and security.
Jul 05, 2025 am 12:42 AM
How to set default apps in Windows 10?
The methods to set default applications include: 1. Select the default application by file type: Go to "Settings > Applications > Default Application", click "Select Default Application by File Type", select the corresponding file type and change the application; 2. Set the default application by protocol: Click "Set Default Value by Application Protocol" on the same page, select protocols such as http, mailto and other protocols and specify the application; 3. Reset all default settings: Find the "Reset" section in the default application settings, and click "Reset to Microsoft Recommended Default Value" to restore the initial configuration.
Jul 05, 2025 am 12:41 AM
How to use Boot Camp to install Windows
Using BootCamp is a direct way to install Windows on an Intel chip Mac. 1. Confirm the Mac model support (IntelMac before 2019), 2. Prepare at least 64GB of USB disk, Windows ISO files, backup data and reserve 50GB of space; 3. Open the BootCamp Assistant, cancel the automatic driver download option, reasonably plan the partition size and create a boot disk; 4. Select the BOOTCAMP partition during installation, and the formatting requires loading the USB disk driver; 5. After the installation is completed, manually run the Setup.exe in the USB disk to install the driver to enable hardware functions; press the Option key to switch the system every time you restart, be careful to avoid adjusting partitions and large sizes in Windows.
Jul 05, 2025 am 12:37 AM
How to eject a disk on Mac
To solve the problem that the USB or external hard disk cannot be safely unplugged on a Mac, first check the desktop icon popup, Finder popup, program docking operation, or uninstall using Disk Tool. 1. Desktop icon pops up: Right-click the disk icon and select "Express" or drag to the "Eject" area next to the docking wastebasket; 2. Finder pops up: Find the device in the Finder sidebar and click the "Eject" button; 3. Docking operation: Right-click the device name and select "Express" or drag to the "Eject" area; 4. Force pops up: Close the occupant program or uninstall it through "Disk Utility". Be sure to develop the habit of popping out first and then pulling out to avoid data corruption.
Jul 05, 2025 am 12:31 AM
How to find a saved Wi-Fi password on Windows 10?
To view the Wi-Fi password saved on Windows 10 devices, it can be done via a command prompt or PowerShell. 1. Open the command prompt for administrator permissions, enter netshwlanshowprofiles to list all networks, then run netshwlanshowprofilename="Wi-Fi-Name"key=clear and view the password under "Key Content"; 2. You can also execute the same command in PowerShell with administrator permissions; 3. If the password is not displayed, it may be that it is not running as an administrator, the network configuration is damaged or the password is not saved correctly. You need to check the permissions or reconnect to the network and ensure the security.
Jul 05, 2025 am 12:31 AM
What to do when the Windows key is stuck
TofixastuckWindowskey,firstdetermineifit’sahardwareorsoftwareissue.1.Checkforphysicalproblemsbypressingthekeygently,lookingfordebris,orinspectingforlooseness.2.TestusingtheOn-ScreenKeyboardtoseeiftheissueissoftware-related.3.Temporarilydisableorremap
Jul 05, 2025 am 12:18 AM
What is Ansible and what are its main components (playbook, inventory, role)?
Ansible's core components include playbook, inventory, and role. Playbook is a task list written in YAML to define operations performed on a remote host, supporting multiple "plays", conditional judgment, loops and idempotence. The Inventory file is used to define hosts and host groups managed by Ansible. It can specify variables, IP ranges, nested groups, and supports dynamic acquisition of host lists. Role is a reusable unit that organizes tasks, templates, files and variables. It has a standard directory structure to improve code reusability and collaboration efficiency. When using it, specify the target host through inventory, define the operation task through playbook, and use r
Jul 05, 2025 am 12:18 AM
How to delete a file in Linux
There are three ways to delete files in Linux: use the rm command, the unlink command and the graphical interface operation. 1. Using the rm command is the most common method, the basic format is the rm file name; adding the -i parameter can confirm deletion, and adding the -f parameter can force deletion; 2. Using the unlink command can only delete a single file, and the syntax is the unlink file name, which is suitable for use in scripts; 3. Right-click to select "Delete" under the graphical interface, the file will enter the "Recycle Bin". Press and hold Shift to delete it to completely delete it. The recycle Bin path is a .Trash folder, which can be manually restored or cleared. Just select the appropriate method according to the scene.
Jul 05, 2025 am 12:16 AM
What is a centralized logging system and what are its benefits?
Acentralizedloggingsystemisbasicallyasetupwherelogsfrommultiplesources—likeservers,applications,ordevices—arecollectedandstoredinonecentrallocation.Thismakesitwayeasiertosearch,analyze,andmonitorallthelogdatawithouth
Jul 05, 2025 am 12:14 AM
How to Clear CoreSpotlight Metadata on Mac When Taking Up Large Amounts of Storage
Spotlight is the powerful search engine built into MacOS that allows you to quickly find any file or data on your Mac disk drives. Part of what makes Spotlight so fast is that it uses caches and temporary files during indexing to quickly refer to dat
Jul 04, 2025 am 09:34 AM
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