Raspberry Pi_Eng_17.1.1 Package

Posted on by realomega

17.1 Package Manager System

17.1.1 Package

Package is a set of files in which all the necessary data is organized in a predefined way so that the program can be distributed and installed in the manner required by the system. The package contains the metadata needed to apply the program as well as the computer program. Package metadata also has the information about a description and version of the package, and dependencies with other packages (relationship with other packages that must be installed first) together.

Raspberry Pi_Eng_17.0 Chapter 17 Program Installation & Upgrade

Posted on by realomega

Chapter 17 Program Installation & Upgrade

Chapter’s Main Topics

This chapter describes the procedure for installing additional programs in the Raspberry Pi system. It also explains how to remove or upgrade previously installed programs.

It includes descriptions on the following topics:
■ Package manager system

■ Package management tool

■ Obtaining installer program source

■ Installing and reinstall program

■ Uninstalling program

■ Update and upgrade of program

■ Upgrade system kernel and firmware

Raspberry Pi_Eng_16.2.3 Creating Text File

Posted on by realomega

16.2.3 Creating Text File

There are many ways to create a text file in Raspberry Pi. There is a method to create it from the Shell Terminal, and a method to process it from the Desktop window.

There are several ways to create simple text files from the Shell Terminal as shown below:

Raspberry Pi_Eng_16.1.4 Special Directory and Special File

Posted on by realomega

16.1.4 Special Directory and Special File

16.1.4.1 Hidden File

On Linux, directory or files that begin with a “.” are considered hidden. These files are usually configuration files and temporary files that are created by various applications for various purposes. These are managed by assigning a hidden attribute in order to distinguish it from ordinary data and not to be seen in daily routine work.

Raspberry Pi_Eng_16.1.3 Specifying Paths for Directory and File

Posted on by realomega

16.1.3 Specifying Paths for Directory and File

There are two ways to specify the path to a directory or file in Linux, depending on the start position described when specifying the path. One is an absolute path method starting from “/” (root directory), and another one is a relative path method based on the current working position.

Raspberry Pi_Eng_16.1.2 Naming Rules for Directory and File

Posted on by realomega

16.1.2 Naming Rules for Directory and File

When naming directory and file, the rules below should be followed:

■ It is case sensitive, and lowercase is recommended by default

■ It is recommended to use only alphanumeric characters, hyphen (-), and period (.).

■ It is not recommended to use *, &, |, ” “, $, blank, and so on.

Raspberry Pi_Eng_16.0 Chapter 16 File Management

Posted on by realomega

Chapter 16 File Management

Chapter’s Main Topics

This chapter explains various methods of managing directorys and data stored in the system. Here we will explain how to handle in the Shell Terminal, and how to handle through the window.

It includes descriptions on the following topics:
■ basic structure of directory and file

■ Management of directory and file

■ Utilization of directory and file

■ Management of text file

Raspberry Pi_Eng_16.1.1 Concept of Directory and File

Posted on by realomega

16.1 Basic Structure of Directory and File

16.1.1 Concept of Directory and File

16.1.1.1 Folder or Directory

Directory does not have any specific data on its own, but is used to manage files that have specific data. Directory is used to improve the efficiency of use by classifing and storing a large number of files and facilitating searches later.