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nvram(8)                    System Manager's Manual                   nvram(8)



NAME
       nvram - manipulate Open Firmware NVRAM variables

SYNOPSIS
       nvram [ -p ] [ -f filename ] [ name ] [= value ] ...

DESCRIPTION
       The nvram command allows manipulation of Open 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
       -p     Print all of the Open Firmware variables.

       -f filename
              Set Open Firmware variables from a text file.  The file must  be
              a  list  name=value statements.  If the last character of a line
              is \, the value will be continued to the next line.

EXAMPLES
              example% nvram boot-args="-s rd=*hd:10"

       Set the boot-args variable to "-s rd=*hd:10".  This would specify  sin-
       gle 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.



                               December 12, 2000                      nvram(8)