Note

Linux 基础命令详解
本文详细介绍了 Linux 系统中常用的命令操作,包括文件权限管理、目录管理及软件安装等。通过本文,读者可以了解如何使用 du、df、bc、cal、date 和 fdisk 等命令进行系统维护,掌握 yum 安装工具的用法,并学会查阅 man 和 info 手册。

Linux command

du / df / bc / cal / date / fdisk

yum install -y

man 7 man 

man -f man <=> whatis man

man -k man | grep man <=> apropos man | grep man

info

ls -al

chgrp /  chown / chmod

chmod 777 / chmod [u|g|o] [+|-|=] [r|w|x]

directory | link | device | sockets | FIFO, pipe

 

 可分享的(shareable)不可分享的(unshareable)
不變的(static)/usr (軟體放置處)/etc (設定檔)
 /opt (第三方協力軟體)/boot (開機與核心檔)
可變動的(variable)/var/mail (使用者郵件信箱)/var/run (程序相關)
 /var/spool/news (新聞群組)/var/lock (程序相關)

  • /etc:設定檔
  • /bin:重要執行檔
  • /dev:所需要的裝置檔案
  • /lib:執行檔所需的函式庫與核心所需的模組
  • /sbin:重要的系統執行檔

 

 

FAQ:

what is different between "info" and "man"

 

reference:

http://linux.vbird.org/linux_basic/0210filepermission.php

转载于:https://www.cnblogs.com/anyboo/p/3683591.html

03-21
### Note Application or Functionality in IT Context In the IT context, a note application refers to software designed for creating, organizing, and managing textual information such as notes, lists, reminders, etc. These applications often provide features like real-time synchronization across devices, tagging, categorization, searchability, and sometimes integration with other productivity tools. The concept of sharing working objects between application components at runtime can be directly related to how modern note-taking apps function[^1]. For instance, these applications may use shared memory spaces or inter-process communication mechanisms to ensure seamless interaction among different parts of an app while maintaining performance efficiency. Additionally, when debugging complex systems involving graphical user interfaces (GUIs), libraries similar to Inspector—a Qt-based tool—can play crucial roles by allowing interactive inspection into lower levels of data models used within those GUI frameworks[^2]. Such capabilities are essential during development phases where understanding internal states becomes necessary for resolving issues effectively. Regarding Android-specific implementations mentioned through LayoutInflater example provided earlier[^3], it demonstrates one way contexts might influence layout inflations which indirectly affects UI elements rendering including potential custom views representing individual 'notes'. Here's simplified code snippet showing basic usage pattern: ```java // Example demonstrating typical utilization scenario. public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Obtain reference via system service method call. LayoutInflater inflater = LayoutInflater.from(this); View view = inflater.inflate(R.layout.activity_main, null); setContentView(view); } } ``` This piece illustrates obtaining `LayoutInflater` object using its factory method tied closely to current activity lifecycle state represented here symbolically under term **context**, thus affecting overall behavior dynamically based upon varying conditions present throughout execution period.
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