fsfreeze --version (return code: 0)
fsfreeze from util-linux 2.27.1
fsfreeze --help (return code: 0)
Usage:
fsfreeze [options] <mountpoint>
Suspend access to a filesystem (ext3/4, ReiserFS, JFS, XFS).
Options:
-f, --freeze freeze the filesystem
-u, --unfreeze unfreeze the filesystem
-h, --help display this help and exit
-V, --version output version information and exit
For more details see fsfreeze(8).