# apt-get install python-software-properties
apt-get install software-properties-common

add-apt-repository ppa:umang/indicator-stickynotes
apt-get update

Si le update ne passe pas on jette un œil à

http://ppa.launchpad.net/umang/indicator-stickynotes/ubuntu/dists/

sed -i -e 's/jessie/wily/' /etc/apt/sources.list.d/umang-indicator-stickynotes-jessie.list
apt-get update 
apt-get install indicator-stickynotes

/etc/apt/sources.list.d/umang-indicator-stickynotes-jessie.list

#deb http://ppa.launchpad.net/umang/indicator-stickynotes/ubuntu jessie main
deb http://ppa.launchpad.net/umang/indicator-stickynotes/ubuntu wily main
# deb-src http://ppa.launchpad.net/umang/indicator-stickynotes/ubuntu jessie main

# add-apt-repository ppa:vincent-vandevyvre/vvv                                                                                                                                  
Traceback (most recent call last):                                                                                                      
  File "/usr/bin/add-apt-repository", line 362, in <module>         
    sys.exit(0 if addaptrepo.main() else 1)
                  ^^^^^^^^^^^^^^^^^                                 
  File "/usr/bin/add-apt-repository", line 345, in main
    shortcut = handler(source, **shortcut_params)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/softwareproperties/shortcuts.py", line 40, in shortcut_handler                                                                                         
    return handler(shortcut, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                         
  File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 86, in __init__                                                                                                       
    if self.lpppa.publish_debug_symbols:                                                                                                          
       ^^^^^^^^^^                                                                                                                                             
  File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 126, in lpppa                                                                                                         
    self._lpppa = self.lpteam.getPPAByName(name=self.ppaname)                                  
                  ^^^^^^^^^^^                                                                                                                                 
  File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 113, in lpteam                                                                                                        
    self._lpteam = self.lp.people(self.teamname)                                                                                                                             
                   ^^^^^^^^^^^^^^                                                                                                                                                             
AttributeError: 'NoneType' object has no attribute 'people'

apt-get install python3-launchpadlib