I have restored my Ubuntu partition into a new disk with clonezilla. During the restoring, there is a disclaimer that suggest the editing of the fstab and grub file. Unfortunately I have no idea on how to configure them. Any help is very appreciated! Please keep it simple as I am a beginner.
Although this is a partial answer, I will provide the solution I have found. I figured that I messed up in creating the image as I did not include the boot partition. What I finally did was to back up my /home partition through
rsync; wipe out all Partitions; Fresh install Ubuntu;
rsync back my /home partition and fix any errors (probably related to the
.xAuthority file) through Live repair Ubuntu solution keeping the data restored. I didn't backup a whole image of my OS but now since I have created a dedicated partition for my /home sector I'll be fine at least for the majority of the personal files I keep and plug-ins installed.