Building kernel ubuntu

Fun things to do building your kernel
I use the Kernel_gcc_patch that adds additional CPU options to the Linux kernel at build time.

For 3.15+ use the patch at
https://github.com/graysky2/kernel_gcc_patch/tree/v3.15%2B

then to use
patch -p1 < enable_additional_cpu_optimizations_for_gcc-updated-for-3.15.patch
 cp -vi /boot/config-`uname -r` .config
make xconfig
Under Processor type and features
   -Processor family
     --Choose your processor.

    -Under Preemption Model
   change to Preemptible Kernel (Low-Latency Desktop) (PREEMPT)
      Select this if you are building a kernel for a desktop or
      embedded system with latency requirements in the milliseconds
      range.

  - Timer frequency
  Choose
  1000 HZ (HZ_1000
   1000 Hz is the preferred choice for desktop systems and other
    systems requiring fast interactive responses to events.

Make any other changes you need then save you config

for my build I have a quad core so
export CONCURRENCY_LEVEL=5
time fakeroot make-kpkg --initrd --revision=`date +%m%d%Y` --append-to-version=-`date +%m%d%Y` kernel-image kernel-headers

after its finished building
cd ..
sudo dpkg -i *.deb

Note for 14.04 and building 3.15
You need to download and install the deb
https://launchpad.net/ubuntu/+source/kernel-package/13.003/+build/5980712/+files/kernel-package_13.003_all.deb
If not you will recieve errors and the build wont complete.

See bug https://bugs.launchpad.net/bugs/1308183

NTFS tricks on linux

Or  How do I mount a hibernated NTFS partition?

Error mounting: mount exited with exit code 14: Windows is hibernated, refused to mount.

sudo mount -t ntfs-3g /dev/'device' 'monutpoint' -o remove_hiberfile
Example:
sudo mount -t ntfs-3g /dev/sde4 ./mnt -o remove_hiberfile

remove_hiberfile
    Unlike in case of read-only mount, the read-write mount is denied if the NTFS volume is hibernated. One needs either to resume Windows and shutdown it properly, or use this option which will remove the Windows hibernation file. Please note, this means that the saved Windows session will be completely lost. Use this option under your own responsibility.

Fix some NTFS  issues

       ntfsfix - fix common errors and force Windows to check NTFS

SYNOPSIS
       ntfsfix [options] device

DESCRIPTION
       ntfsfix  is  a  utility  that fixes some common NTFS problems.  ntfsfix is NOT a Linux version of chkdsk.  It only repairs some fundamental NTFS inconsistencies, resets the
       NTFS journal file and schedules an NTFS consistency check for the first boot into Windows.

       You may run ntfsfix on an NTFS volume if you think it was damaged by Windows or some other way and it cannot be mounted.

Example run:
sudo ntfsfix /dev/sdb1

To install:
sudo apt-get install ntfsprogs

Edit lightdm-gtk-greeter-settings

Nifty little app.
https://launchpad.net/lightdm-gtk-greeter-settings

Even allows you to change the login box position.

Cinnamon applets

World clock gotta have

http://cinnamon-spices.linuxmint.com/applets/view/108
Time format for world clocks: %l:%M%P (%a) %H:%M
Time format for applet: %a %b %e %l:%M %p

Window manager info

Want to know which window manager your running try
wmctrl -m
env | grep -i gdmsession

VirtualBox Guest Additions on Fedora 20/19, CentOS/RHEL 6.5/5.10

This link helps
Make sure to read the comments for updated help..
Above link if you like to copy and paste links
http://www.if-not-true-then-false.com/2010/install-virtualbox-guest-additions-on-fedora-centos-red-hat-rhel

Also see
http://wiki.centos.org/HowTos/Virtualization/VirtualBox/CentOSguest

http://wiki.centos.org/FAQ/CentOS6#head-012846a4e422267a34e81c4c905654fc8f36ffaf

 My suggestion from the comments above

I had to use the info that brandon posted above
ln -s /usr/src/kernels/2.6.32-431.3.1.el6.x86_64/ /usr/src/kernels/2.6.32-431.el6.x86_64
it does not like the extra kernel info 3.1.
and the fix from

http://wiki.centos.org/HowTos/Virtualization/VirtualBox/CentOSguest

Patch for CentOS 6.5 with VBOXADDITIONS_4.3.2/4.3.4
cd /usr/src/kernels//include/drm/
ln -s /usr/include/drm/drm.h drm.h
ln -s /usr/include/drm/drm_sarea.h drm_sarea.h
ln -s /usr/include/drm/drm_mode.h drm_mode.h
ln -s /usr/include/drm/drm_fourcc.h drm_fourcc.h

which is linked from https://forums.virtualbox.org/viewtopic.php?f=3&t=58855