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How To Setup OpenVPN Server In 5 Minutes on Ubuntu Server

I am a new Ubuntu Linux server user. How do I setup an OpenVPN Server on Ubuntu Linux version 14.04 or 16.04 LTS server to shield my browsing activity from bad guys on public Wi-Fi, and more?
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Linux Nvidia: NVRM: GPU at 0000:01:00.0 Has Fallen Off The Bus Error and Solution

I‘m using NVIDIA UNIX x86_64 Kernel Module version (driver) 280.13 under Debian 64 bit Linux with Linux kernel 2.6.32-5-amd64 x86_64. However, I’m getting the following errors in my /var/log/messages file

Feb 13 05:53:39 wks01 kernel: [26652.425207] NVRM: GPU at 0000:01:00.0 has fallen off the bus.
Feb 14 03:59:14 wks01 kernel: [39846.244283] NVRM: GPU at 0000:01:00.0 has fallen off the bus.
Feb 17 04:47:32 wks01 kernel: [35237.485871] NVRM: GPU at 0000:01:00.0 has fallen off the bus.
Feb 18 06:53:19 wks01 kernel: [49298.937949] NVRM: GPU at 0000:01:00.0 has fallen off the bus.
Feb 19 06:14:01 wks01 kernel: [28508.567838] NVRM: GPU at 0000:01:00.0 has fallen off the bus.

This error occurs randomly and my laptop goes in hard freez mode. The hard reboot is the only way to recover from complete freeze of my Dell M6500 Debian Linux based laptop. How do I fix this problem?
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Linux Increasing The Transmit Queue Length (txqueuelen)

How do I set txqueuelen (the length of the transmit queue) length of the network card device under Linux? How do I set it for a high latency and/or a high speed network for bulk transfer from disturbing interactive traffic like ssh too much?
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Linux MTU Change Size

We’ve gigabit networks, and large maximum transmission units (MTU) sizes (JumboFrames) can provide better network performance for our HPC environment. How do I change MTU size under Linux?
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Set Txqueuelen Under Linux

How do I set txqueuelen of my network interface card (NIC) under any Linux distro?
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Red Hat / CentOS Add IPv6 Network Alias (multiple IPv6 IP to Same NIC)

Q. How do I add multiple IPv6 address to eth0 under Red Hat / Fedora / RHEL / CentOS Linux for virtual hosting?
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Install ntop on Red Hat Enterprise Linux / CentOS Linux

Q. ntop is a network probe that shows network usage in a way similar to what top does for processes. How do I install latest version of ntop on RHEL 5.x systems?
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Linux route Add Command Examples

I am a new Linux user. How do I add a new or default gateway using route command on Linux operating systems? How can I use route command to show or set a new route on Linux based server or desktop system?
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OpenVZ Iptables: Allow Traffic To Pass Via venet0 To All VPS

How do I configure IPTABLES to pass all traffic to my VPS (container) under hardware node?
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