operating systems

How do I install iptables under Redhat (RHEL) or CentOS or Fedora Linux operating systems?

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What is the correct format for a TZ (time zone) environment variable for use with the Linux or UNIX operating system?

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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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I‘m running a KVM virtual machine (FreeBSD 7 and Fedora Linux 13 desktop) under Redhat Enterprise Linux 5.5. However, I’m not getting the remote access via VNC (Virtual Network Computing) to access my Fedora Linux graphical desktop or FreeBSD console. How do I turn on VNC support without reinstalling both operating systems?

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I know how to turn off console beep under Gnome Linux desktop. How do I stop console beep under FreeBSD operating systems?

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How do I loop through files in a directory under UNIX like operating systems?

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My xorg.conf file is missing as I deleted accidentally for some reason. Now, Xorg try to probe my hardware on every startup. How do I configure Xorg under Debian or any Linux distro / operating systems?

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