Linux Administration Cookbook

The filesystem check

If you're still uncertain, you can quickly check the type of filesystem being used for slash-root, /:

$ mount | grep "/ "/dev/mapper/VolGroup00-LogVol00 on / type xfs (rw,relatime,seclabel,attr2,inode64,noquota)

XFS is commonly found on Linux systems, specifically RHEL and CentOS:

$ mount | grep "/ "/dev/ada0s1a on / (ufs, local, journaled soft-updates)

The Unix file system (UFS) is usually seen on FreeBSD boxes (alongside ZFS, if you've got the RAM for it):

$ mount | grep "/ "/dev/wd0a on / type ffs (local)

FFS? You're joking... no, it's the fast file system (FFS), and it's commonly used on OpenBSD boxes:

FFS and UFS have the same heritage, though the code base isn't identical.

$ mount | grep "/ "/ on rpool/ROOT/openindiana ...