Archive for the ‘OS’ Category

Backup & Restore your Whole Ubuntu Computer using Remastersys

If you want to completely backup your whole Ubuntu computer, including system files and personal data, then you probably want to first look at Remastersys.

This open-source application can create a snapshot of your computer and make an ISO image of it, then use the image to restore unto a different machine or the same system.
There are some limitations with respect to how much data can be created into an ISO image. Reading from the creator, it seems that there’s a 4GB size limit of what can be backed up and created into an ISO image of your computer. So, if you have a lot of media files and other data that you can safely move somewhere else before backing up, that to. Or use the exclude option with the program to exclude backing up of some unnecessary directories. For your average Ubuntu machine there’s no need to worry, you should be able to back it up easily.

Step 1
Press Ctrl + Alt + T on your keyboard to open terminal. When it opens, run the commands below to install Remastersys repository key.
wget -q -O – |sudo  apt-key add -

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Fix Ubuntu 11.04 Won’t Boot After Restart

After installing Ubuntu 11.04 in a Core 2 Duo Lenovo laptop with Intel Mobile 4 Series Chipset. If the Ubuntu 10.10 worked in flawlessly. But that was not the case when installed the latest Ubuntu. Though installation went smooth, Ubuntu 11.04 just won't boot after restart and instead a blank screen appears with a blinking cursor. This problem can be fixed by doing the following steps.

Step 1

Switch on your laptop and choose 'recovery mode' from GRUB(usually the second option). From the recovery mode prompt, choose 'failsafeX' option.
Choosing failsafeX mode will run your OS in safe graphics mode and you will be able to access classic GNOME desktop now.

Step 2

Open Terminal and do the following then(give password when prompted).
sudo gedit /etc/default/grub
Text Editor window will open up. 

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How to change permission to a folder and all of its subfolders in Linux Ubuntu Terminal


CHMOD uses several options and the -R option changes permission to folder and its subfolders.
chmod <permissionsettings> <dirname>
To change permission we normally use chmod command and it change permission to the current file or directory only.
chmod 1

To change permission to a folder and all of its subfolders use -R option.
chmod -R <permissionsettings> <dirname>

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