Problem

掲題の通り。netstat なのはわかるんですけど、引数がわからないのです。
まぁRHELだけの話ではないですけど。

Solution

こんな感じ。

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$ netstat -tanp | grep LISTEN
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 0.0.0.0:5900            0.0.0.0:*               LISTEN      30587/vino-server
tcp        0      0 0.0.0.0:5901            0.0.0.0:*               LISTEN      31497/vino-server
tcp        0      0 0.0.0.0:5902            0.0.0.0:*               LISTEN      30335/Xvnc
tcp        0      0 0.0.0.0:5903            0.0.0.0:*               LISTEN      31265/Xvnc
tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN      -
tcp        0      0 0.0.0.0:6002            0.0.0.0:*               LISTEN      30335/Xvnc
tcp        0      0 0.0.0.0:6003            0.0.0.0:*               LISTEN      31265/Xvnc
tcp        0      0 192.168.122.1:53        0.0.0.0:*               LISTEN      -
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      -
tcp6       0      0 :::5900                 :::*                    LISTEN      30587/vino-server
tcp6       0      0 :::5901                 :::*                    LISTEN      31497/vino-server
tcp6       0      0 :::5902                 :::*                    LISTEN      30335/Xvnc
tcp6       0      0 :::5903                 :::*                    LISTEN      31265/Xvnc
tcp6       0      0 :::111                  :::*                    LISTEN      -
tcp6       0      0 :::6002                 :::*                    LISTEN      30335/Xvnc
tcp6       0      0 :::6003                 :::*                    LISTEN      31265/Xvnc
tcp6       0      0 :::22                   :::*                    LISTEN      -
tcp6       0      0 ::1:631                 :::*                    LISTEN      -
tcp6       0      0 ::1:25                  :::*                    LISTEN      -
tcp6      20      0 :::2375                 :::*                    LISTEN      -
tcp6       0      0 :::9000                 :::*                    LISTEN      -