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Networking

My server has five Ethernet ports and one ADSL port. How do I setup IPv4 software bridge using Debian Linux operating systems so that the rest of five ports act as a network switch?
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The ethtool can be used to query and change settings such as speed, auto- negotiation and checksum offload on many network devices, especially Ethernet devices. How do I install and use ethtool under Ubuntu or Debian Linux based system running on my IBM server?
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I have recently rented a dedicated server for my hobby projects and learning CentOS Linux server. I was informed that I am connected to the 100M/s port. How do I test my Internet connection download speed from the console over the ssh session without using HTML5 or Adobe flash/Java applets based websites? How do I test my upload speed from the console?
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Debian / Ubuntu: Console Based Network Load Monitor

I am looking for a generic network load monitor that will work over the remote ssh session. Nothing fancy. All I need is current device statistics together with a nice graph. How do I monitor network load using a console based software under Debian or Ubuntu Linux operating systems?
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How do I boot and Install OpenBSD operating system using Preboot Execution Environment (PXE)? Do I need to use an existing OpenBSD host to install OpenBSD using PXE?
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How do I install and configure TFTP server under Debian or Ubuntu Linux server to configure networking equipment such as remote booting of diskless devices or remote loading of Unix like operating systems via PXE boot?
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OpnBSD PPTP Client: Install and Create a VPN

I work form home, and I need to login into our corporate network (Microsoft based PPTP server) using a pptp based vpn. How do I configure and setup up a PPTP VPN client under OpenBSD desktop / laptop or router / server operating systems?
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