nvram(8) System Manager's Manual nvram(8)NAME
nvram - manipulate firmware NVRAM variables
SYNOPSIS
nvram [ -p ] [ -f filename ] [ -d name ] [ -c ] [ name [= value ]] ...
DESCRIPTION
The nvram command allows manipulation of firmware NVRAM variables. It can be used to get or set a variable. It can also be used to print
all of the variables or set a list of variables from a file. Changes to NVRAM variables are only saved by clean restart or shutdown.
In principle, name can be any string. In practice, not all strings will be accepted. New World machines can create new variables as
desired. Some variables require administrator privilege to get or set.
The given value must match the data type required for name. Binary data can be set using the %xx notation, where xx is the hex value of
the byte. The type for new variables is always binary data.
OPTIONS -d name
Deletes the named firmware variable.
-f filename
Set firmware variables from a text file. The file must be a list of "name value" statements. The first space on each line is taken
to be the separator between "name" and "value". If the last character of a line is , the value extends to the next line.
-x Use XML format for reading and writing variables. This option must be used before the -p or -f options, since arguments are pro-
cessed in order.
-c Delete all of the firmware variables.
-p Print all of the firmware variables.
EXAMPLES
example% nvram boot-args="-s rd=*hd:10"
Set the boot-args variable to "-s rd=*hd:10". This would specify single user mode with the root device in hard drive partition 10.
example% nvram my-variable="String One%00String Two%00%00"
Create a new variable, my-variable, containing a list of two C-strings that is terminated by a NUL.
example% nvram -d my-variable
Deletes the variable named my-variable.
October 28, 2003 nvram(8)
Check Out this Related Man Page
rtc(8) NVRAM WakeUp rtc(8)NAME
rtc - Prints the RTC Alarm values using ioctls on /dev/rtc.
SYNOPSIS
rtc
DESCRIPTION
rtc is a helper program from the package nvram-wakeup.
SEE ALSO nvram-wakeup(8)HOMEPAGE
http://sf.net/projects/nvram-wakeup/
AUTHOR
Written by Sergei Haller <Sergei.Haller@math.uni-giessen.de>.
REPORTING BUGS
Report bugs at the bug tracking system (see HOMEPAGE) or on the mailing list nvram-wakeup-devel@lists.sourceforge.net
COPYRIGHT
Copyright (C) 2001-2004 Sergei Haller.
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MER-
CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Linux Jul 07 2004 rtc(8)
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