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Questions and Answers
What is the purpose of the fsck command?
What is the purpose of the fsck command?
- To check and repair file system inconsistencies (correct)
- To unmount a file system
- To mount a file system
- To create a file system on a partition
RAID 0 provides redundancy for data.
RAID 0 provides redundancy for data.
False (B)
What is the purpose of the Copy-on-Write optimization strategy?
What is the purpose of the Copy-on-Write optimization strategy?
To ensure that modifications to data are not written directly to the original location but to a new location.
The _______ command is used to estimate file space usage.
The _______ command is used to estimate file space usage.
Match the following file systems with their features:
Match the following file systems with their features:
What is the default file system for many Linux distributions?
What is the default file system for many Linux distributions?
ZFS is often used in high-availability storage solutions and servers.
ZFS is often used in high-availability storage solutions and servers.
What is the purpose of journaling in a file system?
What is the purpose of journaling in a file system?
The file system feature that allows for large file and volume support is____________.
The file system feature that allows for large file and volume support is____________.
Match the following file systems with their features:
Match the following file systems with their features:
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Study Notes
Types of File Systems
- Local File Systems: Ext4, NTFS, FAT32, HFS+
- Network File Systems: NFS, SMB/CIFS
- Distributed File Systems: HDFS, GlusterFS
- Special-Purpose File Systems: tmpfs, sysfs, procfs
File Systems in Linux
- Ext4: Default file system for many Linux distributions, features journaling and large file support
- Btrfs: Features copy-on-write, snapshots, and built-in RAID support, used for advanced system administration
- XFS: High-performance, journaling, and scalable to large file systems
- ZFS: High storage capacity, data integrity checks, snapshots, and copy-on-write
- FAT32 and exFAT: Compatible with multiple operating systems, used for external drives and USB sticks
Key Concepts
- Journaling: Protects file system integrity by logging changes, enables quick recovery in case of crashes
- Inodes: Store metadata about files and directories, including permissions and ownership
- Mounting: Makes a file system accessible at a specific point in the directory tree, configured in /etc/fstab
- Permissions: Determine file access, represented as rwx for owner, group, and others
- File System Hierarchy Standard (FHS): Defines the directory structure and contents in Linux
Advanced Features
- Snapshots: Point-in-time copy of the file system, supported by Btrfs and ZFS
- Copy-on-Write (CoW): Optimizes data modifications, used by Btrfs and ZFS
- Data Integrity: Techniques to ensure data accuracy, used by ZFS with checksums
- RAID (Redundant Array of Independent Disks): Combines multiple physical disks for redundancy and performance
Commands and Utilities
- fsck: Checks and repairs file system inconsistencies
- e2fsck: Specific to Ext2/Ext3/Ext4 file systems
- mkfs: Creates a file system on a partition
- mount: Mounts a file system
- umount: Unmounts a file system
- df: Reports file system disk space usage
- du: Estimates file space usage
- lsblk: Lists information about block devices
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