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ituknown Knowledge Base

website·Indexed 30 days ago

https://ituknown.org/

A technical knowledge base providing guides and tutorials on Git version control, Linux system administration (including Debian, package management with dpkg, and networking tools like curl, wget, and ifconfig), Windows system configuration, and PowerShell customization.

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What's inside ituknown

  3. Overview of the Linux `ip` command

    The ip command is a powerful network management tool included in the iproute2 package and available by default in most Linux distributions. It is used to manage network interfaces, assign or delete IP addresses, view and modify routing tables, and manage the ARP cache.

    Critical Caveats:

    • Persistence: Changes made via the ip command are temporary and will be lost after a system reboot. To make changes permanent, you must modify the system configuration files.
    • Permissions: Modifying network settings requires superuser privileges (root or sudo).
    # General syntax
ip [ OPTIONS ] OBJECT { COMMAND | help }

  4. Overview of Spring @Import annotation

    The @Import annotation (available since Spring 3.0) is used to import one or more component classes into the Spring application context. It is the underlying mechanism for Spring Boot's auto-configuration (e.g., @EnableAutoConfiguration) and various @Enable annotations. Effectively, @Import wraps the specified classes as BeanDefinition objects and registers them as beans in the Spring container.

  5. Overview of Ventoy multi-boot USB tool

    Ventoy is an open-source, multi-functional USB boot tool used to create bootable USB drives. Unlike traditional burning tools that limit a USB drive to a single operating system, Ventoy allows users to store multiple OS installation files, Live CD images, and other utility tools on a single drive without the need to repeatedly format the drive or recreate boot images.

  6. Overview of Linux Access Control Lists (ACL)

    Access Control Lists (ACLs) allow for more granular permission control than traditional Linux permissions. While standard permissions only define access for the owner, the owning group, and others, ACLs enable administrators to grant specific read, write, or execute permissions to individual users or groups who are not the file owner or part of the owning group.

  7. Overview of the chage command

    The chage command (short for 'change user password expiry information') is used to modify password-related time data for a user account. It primarily modifies fields 3 through 8 of the /etc/shadow file, which include the last password change date, minimum and maximum password age, warning period, password inactivity period, and account expiration date.

  8. Overview of MP4 (MPEG-4 Part 14) container format

    MP4 is a widely supported container format used for storing video, audio, subtitles, and metadata. It offers high compatibility across streaming services, mobile devices, and desktop players. It supports codecs including H.264, H.265, AV1, VP9, VP8, H.262, and H.263. Common extensions are .mp4 and .m4v.

  10. Overview of the lsof command

    The lsof (list open files) utility is used to list all open files on a Linux system. Since Linux treats almost everything (including network sockets, hardware, and processes) as a file, lsof is a powerful tool for system monitoring and troubleshooting. It allows developers to see the file descriptors used by applications to interact with the operating system.