Archive for May, 2009

How to install and initialize telnet on Red Hat Enterprise Linux or Fedora Core Linux.

May 28, 2009
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Telnet is a very old communication protocol, it is not secure because the password authentication is transmitted in clear text. SSH is a secure protocol and is the replacement for telnet. Red Hat recommends that you use SSH to connect to the server, which is why Telnet is disabled by default. This is why...
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How to create a new logical volume in Red Hat Enterprise 5 Linux.

May 28, 2009
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(1) Click on System – Administration – Logical Volume Manager. (2) Expand Uninitilized Entities on the left window by clicking on the arrow next to it. You will now see the available physical disk partitions if there is any. For example /dev/sda or /dev/sdb, sda and sdb are two physical disk drives. (3) Display...
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How to change the shell in Linux or Unix.

May 27, 2009
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Linux and Unix have a vairety of shells. A shell is a program that provides the text interface, it reads the interactive or non interactive commands, interprets and executes the instructions. Depending on your version of Linux or Unix, a number of shells may be available. The default shell for Linux is bash. Here...
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Errors regarding libXp.so.6 in linux

May 26, 2009
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I received errors regarding libXp.so.6 launching the Fame 9.3 release 3 on Redhat Enterprise Linux 5. Error while loading shared library libXp.so.6 Cannot open shared object file. No such file or directory. This error occurs because the library libXp.so.6 is not installed. This occurs on newer Red Hat based distributions where libXp.so.6 has become...
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TOP and TOPAZ are Unix, Linux and AIX utilities that provides real time display of top cpu using processes.

May 23, 2009
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As a server/systems administrator you will find the TOP utility very useful to determine top cpu using processes. TOP is the utility for Linux and most Unix operating systems. IBM Aix has it’s own version which does the same job, it is called Topaz. Top can be download from unixtop.org, the documentation are also...
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How to remove the Windows Genuine Advantage Notification.

May 23, 2009
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I ran the windows update on my XP computer, it downloaded and installed KB905474. This instaled the Windows Genuine Advantage Notification on my Windows XP computer. Now eveyrtime after I reboot my computer the warning message keeps popping up in my screen asking me to check my license registration on line. I know I...
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Determine the disk usage of a file system in Linux or Unix.

May 22, 2009
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As a server administrator you will find that the df commad is very useful to find out the disk usage of a file system in Unix or Linux. Depending on the variant of Linux or Unix, the df command also may/not display the usage of all mounted folders. Below are some examples. df Filesystem...
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How to determine the folder size in Unix or Linux.

May 22, 2009
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The du command displays disk usage for each file or folder. You can use this command to find the size of a folder in Unix or Linux. Below are some examples. du -s /home/andrew 19112204 /home/andrew The above command displays the size of the folder /home/andrew. The option -s displays a summarized size, or...
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How to determine the current shell type in Linux or Unix.

May 22, 2009
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Here is the command to find out what your current shell type is in Linux or Unix. This works for most variants of Unix, Aix, and Linux. echo $0, this will display the shell type. echo $SHELL, this will give you more detailed shell type information. Below is a table of the various shell...
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Upgrading SpamAssassin on Fedora 4 server.

May 17, 2009
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Download the lastet version of SpamAssassin version 3.2.5, the file name is Mail-SpamAssassin-3.2.5.tar.gz. You can get the latest version from spamassassin.apache.org. In this step by step example I am upgrading SpamAssassin version 3.0.3-4.fc4 to 3.2.5 on my Fedora 4 server. After you download the lastest version, build the rpm using this file, the command...
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