diff options
Diffstat (limited to 'sbin/reboot/reboot.8')
-rw-r--r-- | sbin/reboot/reboot.8 | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/sbin/reboot/reboot.8 b/sbin/reboot/reboot.8 index 13d7098..ac3bd47 100644 --- a/sbin/reboot/reboot.8 +++ b/sbin/reboot/reboot.8 @@ -28,7 +28,7 @@ .\" @(#)reboot.8 8.1 (Berkeley) 6/9/93 .\" $FreeBSD$ .\" -.Dd October 11, 2010 +.Dd May 22, 2015 .Dt REBOOT 8 .Os .Sh NAME @@ -42,7 +42,7 @@ .Op Fl lnpq .Op Fl k Ar kernel .Nm -.Op Fl dlnpq +.Op Fl dlnpqr .Op Fl k Ar kernel .Nm fasthalt .Op Fl lnpq @@ -111,6 +111,13 @@ the flushing of the file system cache is performed (if the .Fl n option is not specified). This option should probably not be used. +.It Fl r +The system kills all processes, unmounts all filesystems, mounts the new +root filesystem, and begins the usual startup sequence. +After changing vfs.root.mountfrom with +.Xr kenv 8 , +.Nm Fl r +can be used to change the root filesystem while preserving kernel state. .El .Pp The @@ -128,6 +135,13 @@ Normally, the utility is used when the system needs to be halted or restarted, giving users advance warning of their impending doom and cleanly terminating specific programs. +.Sh EXAMPLES +Replace current root filesystem with UFS mounted from +.Pa /dev/ada0s1a : +.Bd -literal -offset indent +kenv vfs.root.mountfrom=ufs:/dev/ada0s1a +reboot -r +.Ed .Sh SEE ALSO .Xr getutxent 3 , .Xr boot 8 , |