operating systems

Install Iptables Firewall in Redhat / CentOS Linux

by on April 5, 2011 · 0 comments

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

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Linux / UNIX: TZ Environment Variable

by on January 29, 2011 · 2 comments

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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ping command: TTL Expired In Transit Error and Solution

by on October 27, 2010 · 1 comment

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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KVM Virtualization: Start VNC Remote Access For Guest Operating Systems

by on October 4, 2010 · 3 comments

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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FreeBSD: Disable / Stop Console Beep ( Bell )

by on July 21, 2010 · 0 comments

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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UNIX: Loop Through Files In A Directory

by on July 1, 2010 · 3 comments

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

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Linux: Configure Xorg X11 Window System

by on May 13, 2010 · 3 comments

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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