ubuntu linux debian error

ubuntu-unknow-filesystem-exfat

This message:
Error mounting /dev/sdb1 at /media/ederrafo/My Passport:
unknow filesystem type 'exfat'

Solution
Sometimes pendrive are formatted with extfat. The problem occurs because exfat-fuse package is missing in your operation system.
$ ls /usr/bin/ | wc -l
$ sudo apt-get install exfat-fuse exfat-utils

In operation system is installed:
	sbin/dumpexfat
	sbin/exfatfsck
	sbin/exfatlabel
	sbin/fsck.exfat
	sbin/mkexfatfs
	sbin/mkfs.exfat
	sbin/mount.exfat
	sbin/mount.exfat-fuse
	usr/share/doc/exfat-fuse/
	usr/share/doc/exfat-utils/
	usr/share/man/man8/dumpexfat.8.gz
	usr/share/man/man8/exfatfsck.8.gz
	usr/share/man/man8/exfatlabel.8.gz
	usr/share/man/man8/fsck.exfat.8.gz
	usr/share/man/man8/mkexfatfs.8.gz
	usr/share/man/man8/mkfs.exfat.8.gz
	usr/share/man/man8/mount.exfat-fuse.8.gz
	usr/share/man/man8/mount.exfat.8.gz

$ ls /usr/bin/ | wc -l