This example is for Redhat Enterprise 6 but with proper packages (rpm, deb) you can use this tutorial for other linuxes too.
1. Download the following RPMs:
http://download1.rpmfusion.org/free/el/updates/6/x86_64/repoview/exfat-utils.html
http://download1.rpmfusion.org/free/el/updates/6/x86_64/repoview/fuse-exfat.html
2. Install them:
[root@florian ~]# rpm -Uvh exfat-utils-1.0.1-1.el6.x86_64.rpm warning: exfat-utils-1.0.1-1.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 849c449f: NOKEY Preparing... ########################################### [100%] 1:exfat-utils ########################################### [100%]
[root@florian extfat]# rpm -Uvh fuse-exfat-1.0.1-1.el6.x86_64.rpm warning: fuse-exfat-1.0.1-1.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 849c449f: NOKEY Preparing... ########################################### [100%] 1:fuse-exfat ########################################### [100%]
3. mount your exfat volume:
[root@florian extfat]# mount.exfat /dev/sdb2 /mnt/tmp FUSE exfat 1.0.1