This file is indexed.

/etc/bootptab is in bootp 2.4.3-18.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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# /etc/bootptab: database for bootp server (/usr/sbin/bootpd)

# Blank lines and lines beginning with '#' are ignored.
#
# Legend:	(see bootptab.5)
#	first field -- hostname (not indented)
#	bf -- bootfile
#	bs -- bootfile size in 512-octet blocks
#	cs -- cookie servers
#	df -- dump file name
#	dn -- domain name
#	ds -- domain name servers
#	ef -- extension file
#	gw -- gateways
#	ha -- hardware address
#	hd -- home directory for bootfiles
#	hn -- host name set for client
#	ht -- hardware type
#	im -- impress servers
#	ip -- host IP address
#	lg -- log servers
#	lp -- LPR servers
#	ns -- IEN-116 name servers
#	ra -- reply address
#	rl -- resource location protocol servers
#	rp -- root path
#	sa -- boot server address
#	sm -- subnet mask
#	sw -- swap server
#	tc -- template host (points to similar host entry)
#	td -- TFTP directory
#	to -- time offset (seconds)
#	ts -- time servers
#	vm -- vendor magic number
#	Tn -- generic option tag n
#
# Be careful about including backslashes where they're needed.  Weird (bad)
# things can happen when a backslash is omitted where one is intended.
# Also, note that generic option data must be either a string or a
# sequence of bytes where each byte is a two-digit hex value.