NAME

zgenhostid — generate host ID into /etc/hostid

SYNOPSIS

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.