Restoring to previous Boot Environment Post: 302528510

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LEARN ABOUT PLAN9

bootp

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

NAME

       bootp, rarpd, tftpd - Internet booting

SYNOPSIS

       ip/bootp [-d]

       ip/rarpd [-d] [-e etherdev]

       ip/tftpd [-dr] [-h homedir]

DESCRIPTION

       These  programs	support  booting over the Internet.  They should all be run on the same server to allow other systems to be booted.  Bootp
       and tftpd are used to boot everything; rarpd is an extra piece just for Suns.

       Bootp passes to Plan 9 systems their IP address, IP mask, default boot file,  default  file  server,  default  authentication  server,  and
       default	gateway.   These come from the network database file attributes ip, ipmask, bootf, fs, auth, and ipgw attributes respectively (see
       ndb(6) and ndb(8)).  The attributes come from the entry for the system, its subnet, and its network with the  system  entry  having  prece-
       dence, subnet next, and network last.  Bootp will answer requests only if it has been specifically targeted or if it has read access to the
       boot file for the requester.  The -d option causes debugging to be printed to standard output.

       Rarpd performs the Reverse Address Resolution Protocol, translating Ethernet addresses into IP addresses.  The options are:

       d      print debugging to standard output

       e      use the Ethernet mounted at /net/etherdev

       Tftpd transfers files to systems that are booting.  It runs as user none and can only  access  files  with  global  read  permission.   The
       options are:

       d      print debugging to standard output

       h      change  directory  to homedir.  The default is /lib/tftpd.  All requests for files with non-rooted file names are served starting at
	      this directory with the exception of files of the form xxxxxxxx.SUNyy.  These are Sparc kernel boot files where xxxxxxxx is the  hex
	      IP  address of the machine requesting the kernel and yy is an architecture identifier.  Tftpd looks up the file in the network data-
	      base using ipinfo (see ndb(2)) and responds with the boot file specified for that particular machine.  If no boot file is specified,
	      the transfer fails.  Tftpd supports only octet mode.

       r      restricts access to only files rooted in the homedir.

SOURCE

       /sys/src/cmd/ip

SEE ALSO

       ndb(6)

																	  BOOTP(8)