How can I tell Ubuntu to do nothing when I close my laptop lid?

gistfile1.txt

sudo -H gedit /etc/systemd/logind.conf
sudo restart systemd-logind
sudo service systemd-logind restart

or
IgnoreLid=true in /etc/UPower/UPower.conf
service upower restart

or
1.When on AC Power, do nothing when laptop lid is closed: 
gconftool-2 -t string -s /apps/gnome-power-manager/buttons/lid_ac nothing 

2.When on Battery Power, do nothing when laptop lid is closed: 
gconftool-2 -t string -s /apps/gnome-power-manager/buttons/lid_battery nothing

http://askubuntu.com/questions/15520/how-can-i-tell-ubuntu-to-do-nothing-when-i-close-my-laptop-lid


===
all versions

#!/bin/bash

# PLEASE FEEL FREE TO CHANGE THE SCRIPT

# Ubuntu 16.04 [PLEASE COMPLETE]

sed -i '/HandleLidSwitch/d' /etc/systemd/logind.conf >/dev/null 1&>2
echo 'HandleLidSwitch=nothing' >> /etc/systemd/logind.conf >/dev/null 1&>2

# Ubuntu 14.04 [PLEASE COMPLETE]


sed -i '/IgnoreLid/d' /etc/UPower/UPower.conf >/dev/null 1&>2
echo 'IgnoreLid=true'>> /etc/UPower/UPower.conf

# [PLEASE COMPLETE ]

# gconftool-2 -t string -s /apps/gnome-power-manager/buttons/lid_ac [PLEASE COMPLETE ]
# gconftool-2 -t string -s /apps/gnome-power-manager/buttons/lid_battery nothing [PLEASE COMPLETE ]

# RESTART SERVICES

service upower restart
service systemd-logind restart


# disable dim screen
gsettings get org.gnome.settings-daemon.plugins.power idle-dim