===lightdm switch session icon===
--> http://askubuntu.com/questions/462428/14-04-trusty-tahr-lightdm-no-way-to-switch-session#comment609386_462428
''apt-get install --reinstall gnome-session''
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===extensions===
dépot : https://extensions.gnome.org/  
installées : https://extensions.gnome.org/local/  
  
liste extensions usuelles :  
Alt Tab Workspace by kwalo  
Animation Tweaks by Selenium_H12345  
Coverflow Alt-Tab by p91paul  
Dash to Dock by michele_g  
Desktop Icons by rastersoft  
Gnome-Shutdown Button by kirby_33  
Impatience by gfxmonk  
Lock Keys by kazimieras.vaina  
Remove Alt+Tab Delay by tetrafox  
Services Systemd by petres  
Tray Icons: Reloaded by MartinPL  
User Themes by fmuellner  
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===emplacements==
root : ''/usr/share/gnome-shell/extensions''
user : ''~/.local/share/gnome-shell/extensions''
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===recharger gnome sans perdre la session en cours===
-> http://askubuntu.com/questions/455301/how-to-restart-gnome-shell-after-it-became-unresponsive-freeze/496999#496999
ctrl + alt + F1 et ''killall -3 gnome-shell''
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===editer les launchers===
installer ''alacarte''
lancer ''menu principal''
\\ 
===customiser GDM login===
-> https://github.com/juhaku/loginized