Information Technology Reference
In-Depth Information
To perform a backup to a remote tape drive, the system with the tape drive
must have an entry in its
/.rhosts
file for the system to be backed up. This
entry should have the following form:
system root
where
system
is the hostname of the system being backed up. This gives the
root account on
system
root privileges to the system with the tape drive. To
use the tape drive of the remote system, specify that system name (separated
by a colon) before the special device name of the tape drive. For example, to
back up the
/usr
file system of the system
solaris
using the tape drive of the
pluto
system, enter the following line in the
/.rhosts
file on
pluto
:
solaris root
On
solaris
, enter the following command:
# ufsdump 0ucf pluto:/dev/rmt/0 /usr
Restoring a File System Using the ufsrestore Command
The
ufsrestore
command is used to restore a file system backed up using the
ufsdump
command. Like the
ufsdump
command, the
ufsrestore
command
supports an
f
dump_file
command-line argument for identifying the media
that contains the backup. If not specified, the
/dev/rmt/0
device is used by
default. The following listing shows using the
ufsrestore
command to restore
a file system backup from the
/dev/rmt/1
device to the current directory:
# ufsrestore f /dev/rmt/1
The
ufsrestore
command also supports an interactive restore capability that
is enabled using the
i
command-line argument. The
restoresmytable
file is
used to record information about incremental restores. In the event that an
entire file system is restored from a full backup, be sure to delete this file
before restoring, otherwise
ufsrestore
will not restore the files listed in the
restores
mytable because it will appear that they have already been restored.
Restoring Selected Files Using the ufsrestore Command
The
ufsrestore
command can be used to restore selected files from a back-
up instead of the entire file system. You do this by using the extract (
x
) com-
mand-line argument. The files or directories to be restored from the backup
are also listed as command-line arguments on the
ufsrestore
command.
The following listing shows how you extract the
/etc/password
file and the
/etc/default
directory (and its contents) from a backup of the root file sys-
tem on the
/dev/rmt/1
device and restore them to the
/etc
directory:
# ufsrestore xf /dev/rmt/1 /etc/passwd /etc/default
