How can I check the block size of the file system in Linux?

In Linux, you can use the following commands to view file system block sizes: 1. Use the `df -T` command to display mounted file systems and their types. 2. Use the `lsblk -f` command to show disk devices and their file system types. 3. Use the `stat -f /path/to/file` command to display the file system block size of a specific file. 4. Use the `tune2fs -l /dev/device` command to display the file system block size of a specified device. Note that `/path/to/file` and `/dev/device` in the commands above represent the file path and device path you want to view. You can replace them with the actual paths as needed.