yum install tigervnc-server xinetd

/etc/xinetd.d/vnc

service vnc-1366x768
{
   disabled    = no
   socket_type = stream
   protocol    = tcp
   wait        = no
   user        = nobody
   server      = /usr/bin/Xvnc
   server_args = -inetd -once -query localhost -securitytypes=none -geometry 1366x768 -depth 24
   type        = UNLISTED
   port        = 5900
}

service vnc-1600x900
{
   disabled    = no
   socket_type = stream
   protocol    = tcp
   wait        = no
   user        = nobody
   server      = /usr/bin/Xvnc
   server_args = -inetd -once -query localhost -securitytypes=none -geometry 1600x900 -depth 24
   type        = UNLISTED
   port        = 5901
}

service vnc-1920x1080
{
   disabled    = no
   socket_type = stream
   protocol    = tcp
   wait        = no
   user        = nobody
   server      = /usr/bin/Xvnc
   server_args = -inetd -once -query localhost -securitytypes=none -geometry 1920x1080 -depth 24
   type        = UNLISTED
   port        = 5902
}