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Questions and Answers
Which type of permissions are widely available in most file systems?
Which type of permissions are widely available in most file systems?
- System, Owner, Group, and World permissions
- Read and Write permissions
- Execute and Delete permissions
- POSIX file system permissions and access-control lists (ACLs) (correct)
What is the per-file attribute in the original File Allocation Table (FAT) file system?
What is the per-file attribute in the original File Allocation Table (FAT) file system?
- Read-only (correct)
- Execute-only
- Write-only
- Delete-only
Which file system uses ACLs to provide a complex set of permissions?
Which file system uses ACLs to provide a complex set of permissions?
- OpenVMS
- NTFS (correct)
- POSIX
- FAT
What kind of user interface is referred to as permission-driven?
What kind of user interface is referred to as permission-driven?
How many categories of access permissions are there in the OpenVMS file system?
How many categories of access permissions are there in the OpenVMS file system?
Which types of permissions are widely available in most file systems?
Which types of permissions are widely available in most file systems?
What is the per-file attribute in the original File Allocation Table (FAT) file system?
What is the per-file attribute in the original File Allocation Table (FAT) file system?
Which file system uses a permission scheme similar to that of Unix?
Which file system uses a permission scheme similar to that of Unix?
How many categories of access permissions are there in the OpenVMS file system?
How many categories of access permissions are there in the OpenVMS file system?
What kind of user interface is referred to as permission-driven?
What kind of user interface is referred to as permission-driven?
Which operating system heavily inspired Linux namespaces?
Which operating system heavily inspired Linux namespaces?
What is the main purpose of namespaces in the Linux kernel?
What is the main purpose of namespaces in the Linux kernel?
Which of the following is NOT an example of a resource that can exist in multiple namespaces?
Which of the following is NOT an example of a resource that can exist in multiple namespaces?
What is the term 'namespace' often used for in the context of Linux?
What is the term 'namespace' often used for in the context of Linux?
How does a Linux system start out in terms of namespaces?
How does a Linux system start out in terms of namespaces?
Which of the following is an example of a resource that can exist in multiple namespaces?
Which of the following is an example of a resource that can exist in multiple namespaces?
What is the main purpose of namespaces in the Linux kernel?
What is the main purpose of namespaces in the Linux kernel?
What inspired the development of Linux namespaces?
What inspired the development of Linux namespaces?
How does a Linux system start out in terms of namespaces?
How does a Linux system start out in terms of namespaces?
What is a fundamental aspect of containers in Linux?
What is a fundamental aspect of containers in Linux?
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Study Notes
File System Permissions
- Common permissions across most file systems include read, write, and execute.
- The original File Allocation Table (FAT) file system allows for a per-file attribute known as the "hidden" attribute.
- Access Control Lists (ACLs) are used by file systems like NTFS to manage intricate permission settings.
- Unix-style permission schemes are implemented in file systems such as ext3 and ext4.
OpenVMS File System
- OpenVMS file system features three categories of access permissions: owner, group, and world.
User Interfaces and Permissions
- A permission-driven user interface offers options and access based on the user's permissions and roles.
Linux Namespaces
- Linux namespaces were heavily inspired by the features of the Solaris operating system.
- The main purpose of namespaces in the Linux kernel is to isolate processes, allowing multiple instances of resources without conflict.
- The term 'namespace' commonly refers to a logical container for those resources that helps organize and separate them in the Linux environment.
- On initialization, a Linux system starts within a default set of namespaces, typically sharing certain resources with the host.
- An example of a resource existing in multiple namespaces includes network interfaces, which can be virtualized.
- A fundamental aspect of Linux containers is their ability to use namespaces to create lightweight, isolated user-space instances.
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