findmnt(8)

I released util-linux-ng 2.18 two weeks ago. There is many changes, for example completely new libmount (not stable API yet), new fsfreeze(8) and findmnt(8) utils and some important changes in fdisk(8).

From my point of view the most attractive for end users is findmnt(8). This new util is a command line interface to the libmount library, the util is able to search in /etc/fstab, /etc/mtab or /proc/self/mountinfo.

Default output (mounted filesystems):

$ findmnt
TARGET                       SOURCE                FSTYPE   OPTIONS
/                            /dev/sda4             ext3     rw,noatime,errors=co
├─/proc                      /proc                 proc     rw,relatime
│ ├─/proc/bus/usb            /proc/bus/usb         usbfs    rw,relatime
│ ├─/proc/sys/fs/binfmt_misc none                  binfmt_m rw,relatime
│ └─/proc/fs/nfsd            nfsd                  nfsd     rw,relatime
├─/sys                       /sys                  sysfs    rw,relatime
├─/dev                       udev                  devtmpfs rw,relatime,size=197
│ ├─/dev/pts                 devpts                devpts   rw,relatime,gid=5,mo
│ └─/dev/shm                 tmpfs                 tmpfs    rw,relatime
├─/boot                      /dev/sda1             ext3     rw,noatime,errors=co
├─/home/kzak                 /dev/mapper/kzak-home ext4     rw,noatime,barrier=1
│ └─/home/kzak/.gvfs         gvfs-fuse-daemon      fuse.gvf rw,nosuid,nodev,rela
├─/var/lib/nfs/rpc_pipefs    sunrpc                rpc_pipe rw,relatime
├─/mnt/foo                   //sr.net.home/foo     cifs     rw,relatime,mand,unc
└─/mnt/test                  /dev/sda6             btrfs    rw,relatime

Get info about a mountpoint:

$ findmnt /home/kzak
TARGET     SOURCE                FSTYPE OPTIONS
/home/kzak /dev/mapper/kzak-home ext4   rw,noatime,barrier=1,data=ordered

Get all mounted extN filesystems:

$ findmnt -t ext4,ext3
TARGET     SOURCE                FSTYPE OPTIONS
/          /dev/sda4             ext3   rw,noatime,errors=continue,user_xattr
/boot      /dev/sda1             ext3   rw,noatime,errors=continue,user_xattr
/home/kzak /dev/mapper/kzak-home ext4   rw,noatime,barrier=1,data=ordered

The same thing, but from fstab:

$ findmnt --fstab -t ext4,ext3
TARGET     SOURCE                                    FSTYPE OPTIONS
/          UUID=d3a8f783-df75-4dc8-9163-975a891052c0 ext3   noatime,defaults
/boot      UUID=f1cd38fa-c887-4ab8-834b-c8ee659b97fe ext3   noatime,defaults
/home/kzak /dev/mapper/kzak-home                     ext4   noatime,defaults

Don't like LABLEs/UUIDs?

$ findmnt --fstab --evaluate -t ext4,ext3
TARGET     SOURCE                FSTYPE OPTIONS
/          /dev/sda4             ext3   noatime,defaults
/boot      /dev/sda1             ext3   noatime,defaults
/home/kzak /dev/mapper/kzak-home ext4   noatime,defaults

or convert UUID to mountpoint:

$ findmnt -o TARGET --noheadings UUID=f1cd38fa-c887-4ab8-834b-c8ee659b97fe
/boot