install-i3-and-configure-on-ubuntu

sudo apt install i3 i3status dmenu i3lock xbacklight feh conky compton rofi
(and i3 gaps?)

i3-gaps     # window border
feh         # wall paper
rofi        # like os X win+l (could open any application)
compton     # for conky alpha
conky       # manual configuration desktop
i3          # window manager
i3-status   # i3 status bar
i3lock      # lock screen # shift + $mod + x

#########################################

sudo apt install numlockx      #  for numlock on

############ Optinal ####################

download : https://bootstrap.pypa.io/get-pip.py
sudo python3 get-pip.py 

#########################################

sudo apt-get install python3-dev (for netifaces, it is required gcc and etc...)

sudo pip3 install i3pystatus colour netifaces

i3pystatus   # for i3bar.py # configure status bar
colour + netifaces  # for plugin on status bar

#########################################

/usr/share/xsessions/   # manage 
/usr/share/xgreeters/   # set i3 to default exec

#########################################

other file & config & code: see https://github.com/hiyali/dotFiles


##################### for left capslock to ctrl #####################
vi /etc/default/keyboard
XKBOPTIONS="ctrl:nocaps"
sudo dpkg-reconfigure keyboard-configuration