Iterate through Hash of Hashes

Perl

Tuesday, 20 December 2011 09:10

Here's how you would iterate through multidimensional hashes in Perl:

Create a hash first:

#!/usr/bin/perl
use warnings;
use strict;

my %HoH = (
    flintstones => {
        husband   => "fred",
        wife   => "wilma",
        pal   => "barney",
    },
    jetsons => {
        husband   => "george",
        wife      => "jane",
        "his boy" => "elroy",  # Key quotes needed.
    },
    simpsons => {
        husband   => "homer",
        wife      => "marge",
        kid       => "bart",
    },
);

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Connecting one system to multiple networks

Linux

Monday, 28 November 2011 15:17

Q. I have a Linux server that connects to the external network and internal. Both network cards have a gateway. How can I set it up, so that it can access both networks?

A. You would need to set up source routing. This can be done fairly easily, following those steps:

Open up /etc/iproute2/rt_tables, add those two at the bottom: 

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DNS Memory consumption on Windows 2008 R2

Windows

Wednesday, 16 November 2011 08:32

Q. I did a fresh install of Windows 2008 R2 and my DNS memory consumption is going through the roof. If I reboot, it's ok briefly, but then it goes up again. How can I stop it?

A. There are a lot of discussions about DNS high memory utilization on Windows 2008 R2 floating around. A lot of them point to disabling EDNS, which does not decrease the memory usage. The real problem is in fact due to the ports that DNS opens up: 2500 UDP IPv4 and 2500 UDP IPv6. This is a nice and round number for a busy production DNS server, however, for an internal DNS in a small office this is way too much.

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Multiple IP adresses for network device

Linux

Tuesday, 08 November 2011 15:25

Q. I am using Ubuntu Linux and I would like to know how to create alias for eth0 so that I can have multiple IP address?

A. To create alias for eth0 use ifconfig command. It is use to configure a network interface and aliases.

Assuming that your eth0 IP is 192.168.1.10 and you would like to create an alias eth0:0 with IP 192.168.1.11. Type the following command:

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Find out if processor is 32bit or 64 (Linux)

Linux

Thursday, 03 November 2011 07:14

Q. How can I find out if my processor is 64 bit or 32, under linux.

A. Open shell and type:

cat /proc/cpuinfo

You will get an output, most likely of more than one CPU. Let's just pick one and look at it:

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Clear text formatting (Word)

Office

Tuesday, 18 October 2011 06:49

Q. How do I clear formatting in Word 2007/2003?

A. Here are the steps:

1. Select the text that you want to clear the formatting from.
2. On the Home tab, in the Font group, do one of the following click Clear Formatting icon:

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Ubuntu 11.10 move the clock from the middle

Linux

Friday, 14 October 2011 14:59

Q. I've installed Gnome instead of Unity on Ubuntu 11.10, now my clock is the middle of the screen. How do I move it?

A.The process is fairly easy, once again, I don't know why they've changed it from what it was:

1. Hold Alt (it may be Windows key instead) and right-click the clock.

2. Once clicked, you'll get an option to Move or Remove From Panel. Then you can drag it around the bar.

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Install Gnome in Ubuntu 11.10 (Oneiric Ocelot)

Linux

Friday, 14 October 2011 08:23

Here we go again. A new version of Ubuntu is out and if you still don't want to switch from it because of Unity, you are welcome to try and install Gnome. (I didn't try removing or disabling Unity this time, but you are welcome to).

Keep in mind that the new gnome leaves a lot to be desired (like that clock in the middle of the screen) and will take some time to get used to (not as much as Unity though).

Steps:

1. Open shell and run:

sudo apt-get install gnome-shell

2. Once installed, you have to reboot.

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