How to Resolve “mount error(12): Cannot allocate memory” on a Windows Share

From: http://jlcoady.net/windows/how-to-resolve-mount-error12-cannot-allocate-memory-windows-share

If you mount a Windows 7 share using Samba/CIFS you may run into “mount error(12): Cannot allocate memory” if you are using very large files on the Windows machine. Looks like in certain situations Windows needs to be told to run as a file server and to expect large files. You can read more details at Large Files are locking up Windows 7 32 bit and 64 bit, but the solution is to make two registry edits and then restart a service:

1. Set “HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\LargeSystemCache” to “1″.
2. Set “HKLM\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters\Size” to “3″.
3. Restart the “server” service.

Once you have done that you should be able to mount the share using a command like “sudo mount -a” or just reboot the Linux machine.

__USE_GNU (use GNU specific feature)

Directly define __USE_GNU is wrong, __USE_GNU is glibc internal macro that shouldn't be ever defined by apps.

The way to select GNU feature set in glibc headers is to define _GNU_SOURCE, either before including first include header in the source .c/.C file, or by defining it on the command line (-D_GNU_SOURCE).

VirtualBox USB from the command line

Credit: http://richardhorwood.com/108/virtualbox-usb-from-the-command-line/

How to add a USB device using vboxmanage

1. Ensure you actually have USB support for your target VM:

   # VBoxManage showvminfo "somevm" | grep USB
   USB:             enabled

2. If it’s not set to “enabled” you’ll have to add USB support to your VM.  You’ll need to power off the VM to do this:
   
   

   # VBoxManage modifyvm "somevm" --usb on --usbehci on

3. To attach a device that’s plugged into the same system as your VM (in my case, a Sony USB memory stick), grab its UID as follows:

   # VBoxManage list usbhost
   Sun VirtualBox Command Line Management Interface Version 3.1.4
   (C) 2005-2010 Sun Microsystems, Inc.
   All rights reserved.
   
   Host USB Devices:
   [...]
   UUID:               2a2c7255-3b90-448e-aa7a-b1c5710ddd79
   VendorId:           0x054c (054C)
   ProductId:          0x0243 (0243)
   Revision:           1.0 (0100)
   Manufacturer:       Sony
   Product:            Storage Media
   SerialNumber:       6A08102832911
   Address:            0x54c:0x243:256:/pci@0,0/pci108e,5347@2,1
   Current State:      Busy
   

4. Create a usb filter which will tell VirtualBox to provide the USB device to your virtual machine when it’s detected as plugged in on the host:

   # VBoxManage usbfilter add 0 --target "somevm" --name usbstick \
                  --vendorid 054C --productid 0243

5. Go ahead and power on your Virtual Machine.  You’ll notice that the USB device (if it’s currently plugged in) immediately becomes unavailable on the host.  You can confirm that it’s attached and that you didn’t make a typo with the vendor and/or product IDs:

   # VBoxManage showvminfo "somevm"
   [...]
   Currently Attached USB Devices:
   
   UUID:               582313d4-1d51-41ea-a053-ba5ac552d2e5
   VendorId:           0x054c (054C)
   ProductId:          0x0243 (0243)
   Revision:           1.0 (0100)
   Manufacturer:       Sony
   Product:            Storage Media
   SerialNumber:       6A08102832911
   Address:            0x54c:0x243:256:/pci@0,0/pci108e,5347@2,1

That’s it.  You can mount and unmount this device now inside your VM.

Import certificate and key into java key store using keytool

If you have the certificate and key in pkcs12 format you can directly import it into an existing java key store:

keytool -importkeystore -srckeystore server.p12 -srcstoretype pkcs12 -destkeystore server.jks -deststoretype jks

If you have it in PEM you can convert it to pkcs12 first:
cat server_key.pem server_cert.pem server_cacert.pem > server.pem
openssl pkcs12 -export -out server.p12 -in server.pem

Windows VPN: this connection requires an active internet connection

Even though selecting Start>Connect To won't let you connect, this will:
 - Go to Control Panel > Network and Sharing center
 - Click on Manage Network Connections
 - You can see the VPN connection(s) and connect to it (right click and select "Connect")