Linus Torvalds introduced the Linux kernel 4.9. You can download the relevant deb packages from
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The new version made about 16 thousand corrections from 1719 developers, the size of the patch 45 MB changes 11042 files, added 632157 lines of code, deleted lines 354728). About 42% of all changes associated with device drivers, approximately 19% of changes relate to updating the code for specific hardware architectures, 12% related to the network stack, 5% - file systems and 4% c internal kernel subsystems. 11.6% of changes made by the employees of Intel, the same prepared by the staff of Linaro. Red Hat developers contributed 5.7% of the changes Google is 3.3%, Samsung - 3.3%, AMD - 2.9%, IBM - 2.5%.
Warning. The Linux kernel is a critical element of the system. To do the upgrade costs when one of your hardware devices is not working properly, and the new kernel may fix this problem. But at the same time installing a new kernel unnecessarily can lead to undesirable regressions, such as: no network connection, no sound or even the inability to boot the system, so install a new kernel on your own risk.
For 32-bit (single command):
cd /tmp; wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9/linux-headers-4.9.0-040900_4.9.0-040900.201612111631_all.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9/linux-headers-4.9.0-040900-generic_4.9.0-040900.201612111631_i386.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9/linux-image-4.9.0-040900-generic_4.9.0-040900.201612111631_i386.deb; sudo dpkg -i *.deb
cd /tmp; wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9/linux-headers-4.9.0-040900_4.9.0-040900.201612111631_all.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9/linux-headers-4.9.0-040900-generic_4.9.0-040900.201612111631_amd64.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9/linux-image-4.9.0-040900-generic_4.9.0-040900.201612111631_amd64.deb; sudo dpkg -i *.deb
sudo apt purge linux-image-4.9-*