A gist to quickly setup ubuntu for your needs.

QuickSystemSetup.sh

# Disable need to provide password for sudo. use only if you can lock system when afk.
# Add below line to the end of file, where replace $USER with your system username.
sudo visudo
$USER ALL=(ALL) NOPASSWD: ALL

# Install fzf for better reverse search
sudo apt install fzf
cat /usr/share/doc/fzf/README.Debian  # For how to integrate with your shell
echo "source /usr/share/doc/fzf/examples/completion.bash" » ~/.bashrc

#Install Telegram - Better than whatsapp
sudo snap install telegram-desktop

# Press Space after selecting any file to get quick peek, like mac
# Install kdocker, used to minimize any app to Tray bar
# Install pdfshuffler, a simple tool to combine pdfs, remove slides, etc.
# Install tmux - better for creating terminalless-ssh session. Only for servers.
# Add open with option in context menu using nemo
# Install sshpass for nopassword sync
# Install sox to play sound on ubuntu
# Set up Xclip to cut copy from pipe(bash) 
sudo apt-get -y install sox vlc sshpass gnome-sushi kdocker pdfshuffler nemo xclip ntfs-3g && sudo apt upgrade -y tmux

# Configure script variables
export GIT_USERNAME=saurabheights
export [email protected]

# Set locale for git
export LANGUAGE=en_US.UTF-8
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8
sudo locale-gen en_US.UTF-8
sudo dpkg-reconfigure locales

# Disable opening nautilus on connecting mobile for charging
sudo gsettings set org.gnome.desktop.media-handling automount-open false

# Set up Spotify
snap install spotify

# Set up Sublime
wget -qO - https://download.sublimetext.com/sublimehq-pub.gpg | sudo apt-key add -
echo "deb https://download.sublimetext.com/ apt/stable/" | sudo tee /etc/apt/sources.list.d/sublime-text.list
sudo apt-get update
sudo apt-get install -y sublime-text

# Install clipboard manager
sudo add-apt-repository ppa:afelinczak/ppa
sudo apt-get update
sudo apt-get install -y clipit  # Use copyq

# Install youtube-dl - ofcourse to download youtube videos
sudo apt-get remove -y youtube-dl
sudo wget https://yt-dl.org/latest/youtube-dl -O /usr/local/bin/youtube-dl
sudo chmod a+x /usr/local/bin/youtube-dl

# Install Zotero - Research Papers - Reference management software
sudo apt-add-repository ppa:smathot/cogscinl 
sudo apt-get update
sudo apt-get install -y zotero-standalone
sudo chown sk:sk /opt/zotero/  # To allow updates from gui itself. Use https://app.koofr.net/dav/Koofr for webdav

# Install Git and Git Gui
sudo apt-get install -y git git-gui
git config --global core.editor "subl -n -w"
git config --global user.email ${GIT_EMAIL_ID}
git config --global user.name ${GIT_USERNAME}
# Always output gitdiff to stdout. Allows you to find intermediate changes you did if you forget to commit.
git config --global core.pager cat 
# Disable git gui warning to compress the loose objects
git config --global gui.gcwarning false


# Install Powertop - Makes Battery last longer - Needs more work.
sudo apt install -y powertop
echo "@Saurabh - Wait for powertop to calibrate itself. Will take 15-30 minutes."
sudo  powertop -c

sudo apt install -y gnome-tweak-tool # For nightly and other things

# Integrate git completion script and git prompt script
# The below untested line should be enough
#sudo apt-get install git-core bash-completion
wget https://raw.githubusercontent.com/git/git/master/contrib/completion/git-completion.bash -O ~/.git-completion.bash
wget https://raw.githubusercontent.com/git/git/master/contrib/completion/git-prompt.sh -O ~/.git-prompt.sh
echo "source ~/.git-completion.bash" >> ~/.bashrc
# ToDo-Git prompt needs more work. Last 3 directory of folder path, current git branch name, and if anything has changed. 
echo "source ~/.git-prompt.sh" >> ~/.bashrc

# Install to monitor GPU usage as graph
echo "deb https://apt.izzysoft.de/ubuntu generic universe" | sudo tee -a /etc/apt/sources.list
wget http://apt.izzysoft.de/izzysoft.asc
sudo apt-key add izzysoft.asc
sudo apt-get update && sudo apt-get install -y monitorix
sudo subl /etc/monitorix/monitorix.conf
# Edit graph_enable for nvidia, search '<graph_enable>'
sudo service monitorix restart

# Set number of workspaces - 2 rows x 4 columns
dconf write /org/compiz/profiles/unity/plugins/core/vsize 2
dconf write /org/compiz/profiles/unity/plugins/core/hsize 4

# Install below gnome extension to limit alt+tab using windows
# https://extensions.gnome.org/extension/3148/alt-tab-for-dual-monitor/
gsettings set org.gnome.shell.app-switcher current-workspace-only true

# Use dark theme for nautilus
gsettings set org.gnome.desktop.interface color-scheme prefer-dark
# See available themes by deleting Yaru-dark and pressing tab
# gsettings set org.gnome.desktop.interface gtk-theme Yaru-dark

##################
## RANDOM STUFF ##
##################

# Install to convert pynb to pdf and all latex packages
sudo apt-get install -y texlive texlive-latex-extra pandoc texlive-xetex texlive-full
# Install Gummi for realtime view of latex
sudo apt install -y gummi
sudo apt install okular

# Update to nvidia-418 or above
sudo ubuntu-drivers autoinstall 
sudo reboot

# Firefox play mp4
# Tabbed PDF Viewer with Restore session that works unlike Foxit
# Decent light weight image cropper.
# Install sticky notes for ubuntu
# Upgrade vim/vi - must.
sudo apt install -y htop tree cmake-qt-gui ubuntu-restricted-extras qpdfview gthumb xpad
sudo apt upgrade -y vim

# Install openjdk1.7
sudo add-apt-repository ppa:openjdk-r/ppa  
sudo apt-get update   
sudo apt-get install -y openjdk-7-jdk

# Remove title bar from firefox and use tree-style plugin
echo "UNTESTED CODE-CREATING CUSTOM CSS FILE FOR FIREFOX"
mkdir ~/.mozilla/firefox/*.default/chrome/
cd  ~/.mozilla/firefox/*.default/chrome/
echo '@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");' >> ~/.mozilla/firefox/*.default/chrome/userChrome.css
echo '#TabsToolbar {    visibility: collapse !important;}' >> ~/.mozilla/firefox/*.default/chrome/userChrome.css
echo "RESTART FIREFOX TO SEE IF TITLEBAR IS REMOVED"

#Install SpotifyRise and AlarmClock - Make alarms that play song from spotify
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys BBEBDCB318AD50EC6865090613B00F1FD2C19886
sudo apt-get update
sudo apt-get install -y alarm-clock-applet wmctrl xautomation
sudo apt-get -f install 
wget -O spotify-rise https://raw.githubusercontent.com/gcushen/spotify-rise/master/spotify-rise
sudo install spotify-rise /usr/local/bin/spotify-rise
sudo apt install alarm-clock-applet
sudo apt-get install -y xautomation
spotify-rise ${SPOTIFY_PLAYLIST_URI}
echo 'Create an ALARM WITH THIS SPOTIFY URI:- spotify-rise spotify:user:1164323909:playlist:6L5fWP3stIdYISaca0ZyAs'

This automated script installs must needed things for me. Any inputs are welcome.

Nvidia and CUDA:

1. Go to Software and Updates -> Drivers -> Install Nvidia drivers.
2. Go to https://developer.nvidia.com/cuda-90-download-archive?target_os=Linux&target_arch=x86_64&target_distro=Ubuntu&target_version=1604&target_type=deblocal and download cuda-9.0.deb file for nvidia driver version 184.111.
3. Run
   sudo dpkg -i cuda-repo-ubuntu1604-9-0-local_9.0.176-1_amd64.deb
sudo apt-key add /var/cuda-repo-9-0-local/7fa2af80.pub
sudo apt-get update
sudo apt-get install cuda
4. In ~/.bashrc, add
   export PATH=/usr/local/cuda-9.0/bin${PATH:+:${PATH}}
export LD_LIBRARY_PATH=/usr/local/cuda-9.0/lib64\${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}}

If Bluetooth doesn't start try this:-

1. sudo apt-get install linux-generic-hwe-16.04-edge xserver-xorg-input-libinput-hwe-16.04
   or
2. Change #AutoEnable=false to AutoEnable=true in the /etc/bluetooth/main.conf . https://vilimpoc.org/blog/2016/04/30/ubuntu-16-04-bluetooth-speakers/

Image Utilities

sudo apt install libimage-exiftool-perl
sudo apt install gdal-bin

For hibernate, Get UUID of swap partition from disks utility:-
sudo nano /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash resume=UUID=<UUID of swap disk>"
sudo update-grub
sudo systemctl hibernate

Add Hibernate Button using:-

sudo apt-get install chrome-gnome-shell
Install hibernate Status button from https://extensions.gnome.org/extension/755/hibernate-status-button/

https://askubuntu.com/questions/568035/multiple-monitor-mirrored-as-default

set mirroring for external monitor as default

https://stackoverflow.com/a/39632139