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Prerequisites   To run guests with more than 2 GB of RAM, you must have a 64-bit host system. Before continuing with the installation, make sure your Ubuntu host machine supports KVM virtualization. The system should have either an Intel processor with the VT-x (vmx), or an AMD processor with the AMD-V (svm) technology support. Run the following grep command to verify that your processor supports hardware virtualization:      grep -Eoc '(vmx|svm)' /proc/cpuinfo If the CPU supports hardware virtualization, the command will output a number greater than zero, which is the number of the CPU cores. Otherwise, if the output is 0 it means that the CPU doesn’t support hardware virtualization. On some machines, the virtual technology extensions may be disabled in the BIOS by the manufacturers. To check if VT is enabled in the BIOS, use the kvm-ok tool, which is included in the package. Enter the following commands as root or user with sudo privileges to install the cpu-checke...

Boot-Repair is a simple tool to fix Grub boot loader issues        How to Install Boot-Repair Either from an Ubuntu live-session or from your installed Ubuntu session (if you can access it)  connect to the Internet open a new Terminal, then type the following commands (press Enter after each line)                          sudo add-apt-repository ppa:yannubuntu/boot-repair                          sudo apt-get update                          sudo apt-get install -y boot-repair                                    

 To fix the bug files in a samba share shown as folders bug      add this line to the [global] section           # Make sure files are not shown as folders!           store dos attributes = NO Save and restart the samba service          sudo service smbd restart