Linux Basics for Big Data

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Permissions - Overview

Permissions in unix are integral part of the operating system.

You can see the details of a file using ls -la command:

ls -la myfile

And you can see the details of all files in current directory by using:

ls -la

Every file has a owner (also referred as user), a group and permissions. A user can be part of many groups. A group can have many users.

File System - listing details

The permission attributes of a file signify who can do what.

File System - File Permissions