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RANPWD(1)              DragonFly General Commands Manual             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,
              preceed with 0x; for decimal numbers, strip leading zeros; for
              all others, enclose in double quotes and \-escape quotes and
              backslashes if present in the output.  This will ensure that the
              output is always a valid C language constant.  The length
              parameter 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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