03 PS File Types And Modes
File Types:
Files can have various types, each indicating the content and purpose of the file. Common file types include:
a. Text Files (.txt): Files containing plain text without any special formatting. They can be opened and edited with simple text editors.
b. Document Files: Files used to store documents, often with rich formatting and images. Examples include Microsoft Word (.docx), OpenDocument Text (.odt), and PDF (.pdf).
c. Spreadsheet Files: Files used for tabular data and calculations. Examples include Microsoft Excel (.xlsx), OpenDocument Spreadsheet (.ods), and CSV (.csv) files.
d. Image Files: Files storing visual images or graphics. Examples include JPEG (.jpg), PNG (.png), GIF (.gif), and BMP (.bmp) files.
e. Audio Files: Files containing audio data. Examples include MP3 (.mp3), WAV (.wav), and FLAC (.flac) files.
f. Video Files: Files containing video data. Examples include MP4 (.mp4), AVI (.avi), and MKV (.mkv) files.
g. Executable Files: Files containing machine code that can be run as programs. Examples include .exe (Windows) and .app (macOS) files.
h. Archive Files: Files used to compress and package multiple files and folders into a single file. Examples include ZIP (.zip) and TAR (.tar) files.
i. Database Files: Files used to store structured data in a database format. Examples include SQLite (.sqlite) and MySQL (.mysql) files.
File Modes (Permissions):
File modes, often referred to as file permissions, determine who can perform specific operations on a file. In Unix-based systems (Linux, macOS), file modes are represented by three sets of three characters (e.g., "rwxr-xr--"):
The first set of three characters represents the permissions for the file owner (user).
The second set of three characters represents the permissions for the group to which the file belongs.
The third set of three characters represents the permissions for other users (everyone else).
Each set of three characters can have three possible values:
"r" (read): Indicates the ability to read the file's content.
"w" (write): Indicates the ability to modify or write to the file.
"x" (execute): Indicates the ability to execute the file if it is a program or script.
For example, "rwxr-xr--" means that the file owner has read, write, and execute permissions, the group has read and execute permissions, and other users have only read permissions.
File permissions are an essential aspect of file security, as they control who can access, modify, or execute files on a system.
Subscribe the channel for more videos- / @digitalcontent182