In Linux, the maximum length for a filename depends on the filesystem being used. Different filesystems have different limitations on filename length. Here are some common Linux filesystems and their maximum filename lengths:

1. ext2/ext3/ext4 (Linux Standard Filesystems) : The maximum filename length for ext2, ext3, and ext4 filesystems is typically 255 characters. However, this length may be reduced due to other factors like the pathname length or directory structure.

2. XFS (XFS Filesystem) : XFS supports filenames up to 255 bytes (not characters) in length.

3. Btrfs (Btrfs Filesystem) : Btrfs allows filenames up to 255 bytes in length.

4. NTFS (Windows NT File System) : If you have a dual-boot system with Linux and Windows, and the filesystem is NTFS, the maximum filename length is 255 characters.

It’s important to note that the maximum filename length includes the full pathname, including the directory names and separators. Long filenames can be convenient, but it’s essential to ensure compatibility with different filesystems and operating systems when dealing with file and directory names. It’s a good practice to keep filenames reasonably short and avoid using special characters or spaces to enhance cross-platform compatibility and readability.