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Networking

Linux sys-unconfig: Reconfigure the System Upon Next Boot

How do I install and configure NFS version 4 server under Debian or Ubuntu Linux server operating systems using host-based authentication?
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Ubuntu: SIOCADDRT: File exists Error and Solution

I‘m typing the following command under Ubuntu Linux:

route add default gw 192.168.3.2 eth0

But it is giving me out the following error:

SIOCADDRT: File exists

How do I fix this problem?
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ping command: TTL Expired In Transit Error and Solution

When I try to ping other UNIX / Linux / BSD or MS-Windows servers in our network I get the following message:

TTL Expired In Transit

How do I fix this problem?
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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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Nginx: Configure and Install With IPv6 Networking Support

How do I configure IPv6 networking under nginx? How do I assign and use an IPv6 address under nginx web server? How do I enable IPv6 Support in nginx?
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I see the following error in my SELinux enabled CentOS or RHEL server:

Jun 21 13:58:43 server3 restorecond: Will not restore a file with more than one hard link (/etc/resolv.conf) No such file or directory
Jun 21 16:14:51 server3 restorecond: Will not restore a file with more than one hard link (/etc/resolv.conf) No such file or directory
Jun 22 13:32:23 server3 restorecond: Will not restore a file with more than one hard link (/etc/resolv.conf) No such file or directory

How do I fix this problem?
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CentOS / Redhat: Install nginx As Reverse Proxy Load Balancer

How do I configure nginx as failover reverse proxy load balancer in front of two Apache web servers under CentOS / RHEL 5.x?
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KVM: Starting / Stopping Guest Operating Systems With virsh Command

The virsh command can be used to mange local or remote guest operating systems. The program can be used to create, pause, and shutdown domains. It can also be used to list current domains.
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Troubleshooting KVM Virtualization Problem With Log Files

There are various log files stored on the host system to assist with debugging KVM related problems. In this tutorial, I will cover log file locations and tools used to track down KVM problems.
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