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Troubleshooting with ubuntu

Situation1:

I deleted wine package as remove wine* and everything else was removed with it. Then I restarted my computer and it went into loginloop, even if you enter correct password it will ask again and again. Possible reasons

.Xauthourity
gdm
lightgdm

Wifi and ethernet were also not working to update packages by going into terminal model by alt+f2

How to tackle this:

1. make a bootable pendrive

2. try ubuntu from pendrive itself

3. mount your ubuntu

sudo mount /dev/sda2 /mnt 
sudo mount --bind /dev /mnt/dev
sudo mount --bind /proc /mnt/proc
sudo mount --bind /sys /mnt/sys

4.change root

sudo chroot /mnt

5.update

apt-get update

6. If wifi and ethernet is not working

https://help.ubuntu.com/community/NetworkManager

Ubuntu on Y700 (wifi vs cuda)

with kernel 4.4 wifi works but with kernel 4.4, cuda wont work, So im using ubuntu 15.10 everything works fine.

http://askubuntu.com/questions/693109/intel-wireless-8260-unclaimed-network

http://docs.nvidia.com/cuda/cuda-getting-started-guide-for-linux/#axzz479EBMZ00

https://www.linux.com/blog/installupgrade-linux-kernel-3183-stable-ubuntulinux-mintpeppermint

follow these to install cuda on ubuntu with lenovo y700 with ubuntu 15.10:

http://blog2.vorburger.ch/2016/06/linux-graphics-on-ubuntu-1604-for-new.html

http://www.alexanderclines.net/howto/how-to-cuda-toolkit-7-5-on-ubuntu-15-10/

https://www.quantstart.com/articles/Installing-Nvidia-cuda-on-Ubuntu-14-04-for-Linux-GPU-Computing

https://gist.github.com/wangruohui/679b05fcd1466bb0937f

https://www.pugetsystems.com/labs/hpc/Install-NVIDIA-CUDA-on-Fedora-22-with-gcc-5-1-654/