LCA File Systems & Storage Management

Question 1

Which command is used to create a new ext4 file system in Linux?

Accepted Answer

mkfs.ext4

Answer

The `mkfs.ext4` command is specifically used to create an Ext4 file system on a specified partition or device. `mkfs` stands for "make filesystem," and the `.ext4` suffix indicates the type of file system to be created. This command initializes the file system structure, making the partition ready to store data.

Question 2

What is the purpose of the `mount` command in Linux?

Accepted Answer

To make a file system accessible at a specific directory

Answer

The `mount` command in Linux is used to attach a file system from a storage device to a specific directory in the existing file system hierarchy. This makes the files and directories on that device accessible through the specified mount point. Without mounting, the contents of the device cannot be accessed by the operating system.

Question 3

Which file contains the persistent mount information in Linux?

Accepted Answer

/etc/fstab

Answer

The `/etc/fstab` file stores persistent mount information, meaning it defines file systems that should be mounted automatically every time the system boots. Each entry in this file specifies a device, its mount point, file system type, and various options. This ensures that critical partitions and devices are always available.

Question 4

What does the `df` command display?

Accepted Answer

Used and available disk space

Answer

The `df` command (disk free) reports the amount of disk space used and available on file systems. When used with the `-h` option (`df -h`), it displays the information in a human-readable format (e.g., GB, MB). This command is essential for monitoring disk usage and preventing storage-related issues.

Question 5

What is LVM primarily used for?

Accepted Answer

Logical partition management

Answer

LVM (Logical Volume Manager) provides a flexible way to manage disk space by abstracting the underlying physical storage. It allows administrators to create, resize, and move logical volumes without modifying physical partitions directly. This simplifies storage management, enabling dynamic allocation and reallocation of disk space.

(LCA) Certified Linux Administrator Practice Test

(LCA) Certified Linux Administrator Practice Test

LCA File Systems & Storage Management