Popular Posts
javax.net.ssl.SSLHandshakeException: Connection closed by peer in Android 5.0 Lollipop Recently, there is a error occurs when access website via ssl connection like below although it worked fine several days ago. // Enable SSL... JSRequest, Get parameters from querystring with javascript in SharePoint Provides method to parse query string, filename, and pathname from URL // Initialize first JSRequest.EnsureSetup(); // Get the current fil... Redirect webpart in sanboxed solution using System; using System.ComponentModel; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebCo...
Stats
Compacting VirtualBox Disk Images - Linux Guests
  1. Start the Linux virtual machine;
  2. Clean the free space on the disk of the Linux virtual machine; 
    dd if=/dev/zero of=zerofillfile bs=1M
    • if= specifies the input file;
    • /dev/zero indicates a bit-stream of zeros
    • of= specifies the output file
    • zerofillfile name of the file containing the bit-stream of zeros
    • bs= indicates the block size
    • 1M indicates that the block size will be 1 megabyte
    rm zerofillfile
  3. Shutdown the Linux virtual machine;
  4. Use the VirtualBox VBoxManage utility to compact the Linux guest image.

Ref: Compacting VirtualBox Disk Images - Linux Guests