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RANPWD(1)							     RANPWD(1)

NAME
       ranpwd - generate random passwords

SYNOPSIS
       ranpwd [options] [length]

DESCRIPTION
       ranpwd  generates  random passwords.  On Linux, it will use the kernel-
       based true random number generator to generate cryptographically secure
       passwords.

       If  length  is  not given, it defaults to 8 characters unless specified
       below.

   OPTIONS
       --ascii
	      Allow any printable ASCII character except space.	 This  is  the
	      default.

       -a , --alphanum
	      Generate mixed-case alphanumeric passwords.

       -l , --alphanum --lower
	      Generate lower-case alphanumeric passwords.

       -u , --alphanum --upper
	      Generate upper-case alphanumberic passwords.

       -A , --alpha
	      Generate mixed-case alphabetic passwords.

       -L , --alpha --lower
	      Generate lower-case alphabetic passwords.

       -U , --alpha --upper
	      Generate upper-case alphabetic passwords.

       -x , --hexadecimal --lower
	      Generate lower-case hexadecimal numbers.

       -X , --hexadecimal --upper
	      Generate upper-case hexadecimal numbers.

       -d , --decimal
	      Generate decimal numbers.

       -o , --octal
	      Generate octal numbers.

       -b , --binary
	      Generate a bit string (for Bynar sabotage teams.)

	      -i  ,  --ip  Generate  a	random IP suffix (normally used with a
	      169.254.	prefix).  The first octet cannot be  0	or  255.   The
	      default is two octets.

	      -m  ,  --mac-address  Generate  a random MAC address.  The first
	      octet must have the multicast bit clear, and the local bit  set.
	      The default is six octets.

	      -M , --mac-address --upper Generate an upper case MAC address.

       -s , --secure
	      On  systems  which  have /dev/random support, use /dev/random to
	      generate passwords  rather  than	/dev/urandom.	This  is  more
	      secure, but may be slower, as the process will block rather than
	      degrade to  a  PRNG  if  true  random  numbers  are  temporarily
	      unavailable.   Using  -s on a system without /dev/random support
	      results in an error message.

       -c , --c
	      For octal numbers, preceed with 0; for hexadecimal numbers, pre‐
	      ceed  with 0x; for decimal numbers, strip leading zeros; for all
	      others, enclose in double quotes and \-escape quotes  and	 back‐
	      slashes  if  present  in	the output.  This will ensure that the
	      output is always a valid C language constant.  The length param‐
	      eter on the command line is always number of significant digits,
	      not the length of the output.

   AUTHOR
       H. Peter Anvin <hpa@zytor.com>

H. Peter Anvin			19 January 2008			     RANPWD(1)

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