Understanding Permissions Under GNU/Linux Systems
Source: Muktware - Posted by Alex   
Security "Permission plays a vital role in everyday life, without permission we cannot achieve work in a swift manner. Thus understanding permission is a crucial task and one should be well adept with the rules of the permission. Today we unravel various aspects of the permission that has been implemented in the *Unix subsystem". Every operating system handle files and directories uniquely. The security of the system depends on many factors however the most important aspect is the way how an OS handles file. Window or NT based OS treats all files equally, which may lead to security holes and unwanted vulnerabilities for hackers to exploit. Due to which Windows has always been a hackers delight. Contrary to Windows, Unix based system or Linux handles files in a much sophisticated manner, special set of rules has been defined for better and efficient file handling.

Unlike Windows, Linux has varied log-in scenario and many users can log-in and use the system at once. Thus it is very necessary for everyone to bypass the security by entering the valid login id and password so that they can access the bread of their share. So it is very necessary for the system to preserve the space and share so that users don't goof up with other users data. To ensure a smooth functionality, every user has been provided with his her home folder under /home//. A place where system provides permission so that only the user can access and share files and others cannot mess around.

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