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network interface

Set Txqueuelen Under Linux

How do I set txqueuelen of my network interface card (NIC) under any Linux distro?
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Linux See Ethernet Statistics

How do I see Ethernet (eth) statistics under Linux operating systems?
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Q. How do I capture specific protocol or port such as 80 ( http ) using TCPDump tool under Linux / UNIX? How do I recording Traffic with TCPDump and find problems later on?
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I want to to configure named ( BIND DNS Sever daemon ) to listens only on eth1 interface which has an IP address 202.54.1.2. How do I configure my named BIND DNS name server to listen only on certain network interface or IP address on a Linux or Unix-like systems?
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FreeBSD Find Out Network Card / Port Speed

Q. Under Linux I can use Ethtool and mii-tool, but they are not available under FreeBSD. How do I tell the port speed of the nic under FreeBSD operating system?
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Q. I've installed Red Hat Enterprise Linux 5.2 and I see virbr0 network interface along with my eth0 interface? What it is? How do I disable or remove virbr0?
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Q. How do I install sar command under FreeBSD to collect, report, or save system activity information? How can I setup freebsd accounting?
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