/etc/mtab

$ ls -la /etc/{fs,m}tab
-rw-r--r-- 1 root root 1,2K 2009-12-17 23:07 /etc/fstab
-rw-r--r-- 1 root root  698 2010-02-25 21:10 /etc/mtab

$ cat /etc/mtab
/dev/sda5 / ext4 rw,errors=remount-ro 0 0
proc /proc proc rw 0 0
none /sys sysfs rw,noexec,nosuid,nodev 0 0
none /sys/fs/fuse/connections fusectl rw 0 0
none /sys/kernel/debug debugfs rw 0 0
none /sys/kernel/security securityfs rw 0 0
udev /dev tmpfs rw,mode=0755 0 0
none /dev/pts devpts rw,noexec,nosuid,gid=5,mode=0620 0 0
none /dev/shm tmpfs rw,nosuid,nodev 0 0
none /var/run tmpfs rw,nosuid,mode=0755 0 0
none /var/lock tmpfs rw,noexec,nosuid,nodev 0 0
none /lib/init/rw tmpfs rw,nosuid,mode=0755 0 0
/dev/sda6 /home ext4 rw 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,noexec,nosuid,nodev 0 0
gvfs-fuse-daemon /home/angel/.gvfs fuse.gvfs-fuse-daemon rw,nosuid,nodev,user=angel 0 0