my modest i3 and i3 blocks configuration files

btw, how to add icons in your i3blocks.conf file ?

Quite easy actually, but I wasted some time to find it, so here is the way I chose :

1. You need to install the fonts the icons you want are in. As for me, I installed fonts-font-awesome :

   aptitude install fonts-font-awesome

2. For Debian 9, which is the OS I use, Stretch repos don't have the 5.0 version of fonts-font-awesome, but only 4.7 . Not a problem, but you will have less choice for your icons. See https://fontawesome.com/v4.7.0/icons/ for the list.
3. Now the font is installed, you must declare i3 you want to use it. In your i3 config file (for me it is ~/.config/i3/config), add this setting in the bar section :

   bar {
   # (...)
   font pango:DejaVu Sans Mono, Awesome 8
   # (...)    

4. And here comes the nice part : inserting icons in your i3blocks.conf file, as labels for instance. To do so, you may
   • copy paste the symbol from the fontawesome web site https://fontawesome.com/v4.7.0/icons/
   • or insert the icons unicodes directly in your conf file. I used vim to do that, but I think Emacs can do it as well, and maybe graphical editors too.
     • with vim then, put your cursor at the desired place for the icon
     • go into insert mode (a or i)
     • enter "ctrl+v"
     • then enter the letter "u"
     • and write the unicode of your chosen icon (four characters, as "f012" for example)
     • once done, save and quit (":wq" for newbies as me :) )
     • your icons should be here !