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Debian Linux Disable IPv6 Networking

How do I disable an IPv6 network connection and all its subsystem for my server? I’m having some problem with my GUI program under Debian “Squeeze”, how can I disable IPv6?
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Linux Disable Mounting of Uncommon Filesystem

How do I disable mounting of uncommon file systems such as hfs, udf, cramfs etc under Fedora or CentOS / RHEL / Redhat Enterprise Linux?
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Linux Disable USB Devices (Disable loading of USB Storage Driver)

In our research lab, would like to disable all USB devices connected to our HP Red Hat Linux based workstations. I would like to disable USB flash or hard drives, which users can use with physical access to a system to quickly copy sensitive data from it. How do I disable USB device support under CentOS Linux, RHEL version 5.x/6.x/7.x and Fedora latest version?
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CentOS / Red Hat / Fedora Linux Turn off Beep / Bell Terminal Sound

Q. I’m using CentOS Linux v5.x and I’d like to turn off the bell sound. How do turn off the beep?
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