Is Linux case sensitive?

Is Linux case sensitive?

• A. Yes
• B. Depends on user permissions
• C. No
• D. Only on certain filesystems

Answer: (C)

Linux treats file and directory names as case sensitive. The filesystem stores names as exact byte strings, so uppercase and lowercase letters are distinct—for example, data.txt and Data.txt refer to two different files. This behavior is true for common Linux filesystems like ext4, XFS, and btrfs, and it’s independent of permissions, which control access, not name matching. In some non-native or mounted filesystems (such as FAT or certain NTFS setups) you might encounter a different, case-insensitive presentation, but that’s due to the filesystem’s design or mount options, not Linux itself. So, Linux is case sensitive for filenames in typical environments.

Linux treats file and directory names as case sensitive. The filesystem stores names as exact byte strings, so uppercase and lowercase letters are distinct—for example, data.txt and Data.txt refer to two different files. This behavior is true for common Linux filesystems like ext4, XFS, and btrfs, and it’s independent of permissions, which control access, not name matching. In some non-native or mounted filesystems (such as FAT or certain NTFS setups) you might encounter a different, case-insensitive presentation, but that’s due to the filesystem’s design or mount options, not Linux itself. So, Linux is case sensitive for filenames in typical environments.