Hack a centos Linux box

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04-14-2014

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Hack a centos Linux box

HI,
I have a Centos linux box and there is interface connect to internet.
I stop the iptables in this box .
After a few day , I find the linux box have been hacked and install some perl script into the box .
Could anyone tell me how the hacker can login into the centos box without knowing the root passwd ???
How can they do it ?? please advise in detailed stop...
Thank

chuikingman

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LEARN ABOUT CENTOS

genrbox

GENBOX(1)						      General Commands Manual							 GENBOX(1)

NAME

       genrbox - generate a RADIANCE description of a box

SYNOPSIS

       genrbox mat name xsiz ysiz zsiz [ -i ][ -r rad | -b bev ]

DESCRIPTION

       Genbox  produces  a  RADIANCE  scene  description of a parallelepiped with one corner at the origin and the opposite corner at (xsiz, ysiz,
       zsiz).  The sides of the box will be parallel to the three coordinate planes.  The surfaces that make up the box will be  modified  by  mat
       and  their  identifiers	will  begin  with  name.  The -i option can be used to produce a box with inward directed surface normals.  The -r
       option can be used to specify the radius for rounded edges.  The -b option can be used to specify the indentation for beveled edges.

EXAMPLE

       To produce a rectangular box made of wood with beveled edges:

	 genrbox wood box1 5 8 3 -b .5 > box1

AUTHOR

       Greg Ward

BUGS

       Because spheres and cylinders are used to construct boxes with rounded edges, a transparent box of this type appears quite messy.

SEE ALSO

       genrev(1), gensurf(1), genworm(1), rpict(1), rvu(1), xform(1)

RADIANCE
							     11/15/93								 GENBOX(1)

Red Hat