zgenhostid

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

NAME

   zgenhostid  generate host ID into /etc/hostid

SYNOPSIS

   zgenhostid [-f] [-o filename] [hostid]

DESCRIPTION

   Creates /etc/hostid file and stores the host ID in it.  If hostid was provided, validate and store that value.  Otherwise, randomly generate an ID.

OPTIONS

   -h           Display a summary of the command-line options.

   -f           Allow output overwrite.

   -o filename  Write to filename instead of the default /etc/hostid.

   hostid       Specifies  the  value to be placed in /etc/hostid.  It should be a number with a value between 1 and 2^32-1.  If 0, generate a random ID.  This value must be unique among
                your systems.  It must be an 8-digit-long hexadecimal number, optionally prefixed by "0x".

FILES

   /etc/hostid

EXAMPLES

   Generate a random hostid and store it
             # zgenhostid

   Record the libc-generated hostid in /etc/hostid
             # zgenhostid "$(hostid)"

   Record a custom hostid (0xdeadbeef) in /etc/hostid
             # zgenhostid deadbeef

   Record a custom hostid (0x01234567) in /tmp/hostid and overwrite the file if it exists
             # zgenhostid -f -o /tmp/hostid 0x01234567

SEE ALSO

   genhostid(1), hostid(1), sethostid(3), spl(4)

HISTORY

   zgenhostid emulates the genhostid(1) utility and is provided for use on systems which do not include the utility or do not provide the sethostid(3) function.

OpenZFS May 26, 2021 ZGENHOSTID(8)