How to make use of KVM snapshots via “virsh”

Posted on November 13, 2014 by Ahmed Tawfik

This is a very interesting article that contained everything I needed about KVM snapshots. It listed all the “virsh” command parameters for snapshots with an excellent explanation of each one:

https://xdev.me/article/How_to_use_KVM_snapshots

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How to configure network settings in CentOS (from dhcp to static)

Posted on October 25, 2014 by Ahmed Tawfik

It’s a bit different from what we’re used to do in Ubuntu, here are the instructions, assuming our network interface is eth0:

  1. Take a backup from the “/etc/sysconfig/network-scripts/ifcfg-eth0” file, e.g. by the following command: “cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0.bak”
  2. Open the “/etc/sysconfig/network-scripts/ifcfg-eth0” file for editing using vi or similar and do the following:
    1. change BOOTPROTO from “dhcp” to “static”
    2. Add the following lines replacing the “X” with your values:
      1. IPADDR=XXX.XXX.XXX.XXX
      2. NETMASK=XXX.XXX.XXX.XXX
      3. GATEWAY=XXX.XXX.XXX.XXX
      4. DNS1=XXX.XXX.XXX.XXX
        Note: You can add more “DNS1” entries to add additional DNS servers
  3. Restart the network:
    “/etc/init.d/networking restart”

That’s it! Enjoy!

Source: http://www.howtoforge.com/linux-basics-set-a-static-ip-on-centos

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How to use Tor with any Linux App

Posted on October 14, 2014 by Ahmed Tawfik

I currently prefer Chrome to Firefox, and I wanted to use Tor without having to download the whole tor browser bundle. Surprisingly, that was a piece of cake!

All I did was the following:

“sudo apt-get install tor”

It runs by default on port 9050, so all you have to do now is configure any of your apps to use Socks5 proxy and pointing them at localhost with port 9050.

Note: I used Proxy SwitchySharp on Chrome to quickly move between a direct connection and a Tor one.

Note: It’s by the way added to your system startup apps, so you can use bum or similar to disable its autostart

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How to change desktop icon text color on Linux Mint 17 Cinnamon Edition

Posted on September 20, 2014 by Ahmed Tawfik

I know, it’s an extremely stupid issue!

Here is the solution:

Just go to /usr/share/themes/Adwaita/gtk-3.0/ and add the following text to the file named gtk.css:

.nemo-desktop.nemo-canvas-item {
color: #FFFFFF;
text-shadow: 1px 1px @desktop_item_text_shadow;
}

.nemo-desktop.nemo-canvas-item:selected {
background-color: alpha(#D64A38, 0.9);
background-image: none;
color: #FFFFFF;
text-shadow: none;
}

You can replace Adwaita with whatever theme you’re using and the color codes to whichever colors you choose (#FFFFFF is for white, which is perfect for me)

Credit goes to herunotenchi on https://github.com/linuxmint/Cinnamon/issues/3226

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How to fix Bluetooth problem on HP laptops with Ubuntu (or similar)

Posted on June 26, 2014 by Ahmed Tawfik

A very annoying issue I had with my hp g62 laptop, is that Ubuntu 14.04 couldn’t detect my bluetooth adapter and I couldn’t send or receive any files or pair any devices.

This problem might extend to many other hp laptops. The solution is simply the following command:

sudo bccmd psset -r 0x028c 0x0001

Then restart bluetooth:

sudo restart bluetooth

Enjoy!

 

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