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.\" <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
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.Dd June 1, 2016
.Dt MOUNT_NILFS 8
.Os
.Sh NAME
.Nm mount_nilfs
.Nd mount a NILFS file system
.Sh SYNOPSIS
.Nm
.Op Fl c Ar checkpoint
.Op Fl o Ar options
.Op Fl t Ar gmtoff
.Ar special
.Ar node
.Sh DESCRIPTION
NILFS is a log-structured file system designed to support fast
writing, fast recovery times, live snapshots, concurrent read-only
snapshot mounts, and live file system resizing.
Its inodes are managed using B-trees.
.Pp
The
.Nm
command attaches the NILFS file system residing on the specified
.Ar special
device node on the location indicated with
.Ar node .
.Pp
.Bl -tag -width XXXoptions
.It Fl c Ar checkpoint
Select the checkpoint number
.Ar checkpoint
to be mounted instead of the default last one.
.It Fl o Ar options
Use the specified mount
.Ar options
as specified in
.Xr mount 8 .
.It Fl t Ar gmtoff
Set the time zone offset (in seconds) from UTC to
.Ar gmtoff ,
with positive values indicating east of the Prime Meridian.
If not set, the user's current time zone will be used.
.El
.Sh SEE ALSO
.Xr mount 2 ,
.Xr vnd 4 ,
.Xr fstab 5 ,
.Xr mount 8 ,
.Xr mount_lfs 8 ,
.Xr umount 8 ,
.Xr vnconfig 8
.Sh HISTORY
NILFS is a file system developed by NTT and released in 2005 for
Linux.
Version 2 is available since 2009.
This cleanroom implementation was written by
.An -nosplit
.An Reinoud Zandijk
for
.Nx
in 2009, and has first been released as part of
.Nx 6 .
.Sh AUTHORS
This implementation of NILFS was written by
.An Reinoud Zandijk .
.Sh CAVEATS
This implementation currently only supports read-only operation.
See
.Xr mount_lfs 8
for an older log-structured file system with write support.
Also see
.Xr wapbl 4
and
.Xr mount 8
for fast journal-based recovery using FFS.