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sbin/dumpfs/dumpfs.8
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||||
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | ||||
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | ||||
.\" SUCH DAMAGE. | .\" SUCH DAMAGE. | ||||
.\" | .\" | ||||
.\" @(#)dumpfs.8 8.1 (Berkeley) 6/5/93 | .\" @(#)dumpfs.8 8.1 (Berkeley) 6/5/93 | ||||
.\" $FreeBSD$ | .\" $FreeBSD$ | ||||
.\" | .\" | ||||
.Dd May 16, 2013 | .Dd July 2, 2021 | ||||
.Dt DUMPFS 8 | .Dt DUMPFS 8 | ||||
.Os | .Os | ||||
.Sh NAME | .Sh NAME | ||||
.Nm dumpfs | .Nm dumpfs | ||||
.Nd dump UFS file system information | .Nd dump UFS file system information | ||||
.Sh SYNOPSIS | .Sh SYNOPSIS | ||||
.Nm | .Nm | ||||
.Op Fl f | .Op Fl f | ||||
.Op Fl l | .Op Fl l | ||||
.Op Fl m | .Op Fl m | ||||
.Op Fl s | |||||
.Ar filesys | device | .Ar filesys | device | ||||
.Sh DESCRIPTION | .Sh DESCRIPTION | ||||
The | The | ||||
.Nm | .Nm | ||||
utility prints out the UFS super block and cylinder group information | utility prints out the UFS super block and cylinder group information | ||||
for the file system or special device specified, unless the | for the file system or special device specified, unless the | ||||
.Fl f , | .Fl f , | ||||
.Fl l | .Fl l , | ||||
.Fl m , | |||||
or | or | ||||
.Fl m | .Fl s | ||||
flag is specified. | flag is specified. | ||||
The listing is very long and detailed. | The listing is very long and detailed. | ||||
This | This | ||||
command is useful mostly for finding out certain file system | command is useful mostly for finding out certain file system | ||||
information such as the file system block size and minimum | information such as the file system block size and minimum | ||||
free space percentage. | free space percentage. | ||||
.Pp | .Pp | ||||
If | If | ||||
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.Fl n | .Fl n | ||||
and | and | ||||
.Fl r | .Fl r | ||||
are neither checked for nor output but should be. | are neither checked for nor output but should be. | ||||
The | The | ||||
.Fl r | .Fl r | ||||
flag is needed if the filesystem uses | flag is needed if the filesystem uses | ||||
.Xr gjournal 8 . | .Xr gjournal 8 . | ||||
.Pp | |||||
If | |||||
.Fl s | |||||
is specified, only the super block information is printed. | |||||
.Sh SEE ALSO | .Sh SEE ALSO | ||||
.Xr fs 5 , | .Xr fs 5 , | ||||
.Xr fsck 8 , | .Xr fsck 8 , | ||||
.Xr gpart 8 , | .Xr gpart 8 , | ||||
.Xr newfs 8 , | .Xr newfs 8 , | ||||
.Xr tunefs 8 | .Xr tunefs 8 | ||||
.Sh HISTORY | .Sh HISTORY | ||||
The | The | ||||
.Nm | .Nm | ||||
utility appeared in | utility appeared in | ||||
.Bx 4.2 . | .Bx 4.2 . |