La désinstallation de Rubis gemmes

user@machine:~$ gem list

*** LOCAL GEMS ***

bigdecimal (1.2.8)
did_you_mean (1.0.0)
io-console (0.4.5)
json (1.8.3)
minitest (5.8.4)
net-telnet (0.1.1)
power_assert (0.2.7)
psych (2.0.17)
rake (10.5.0)
rdoc (4.2.1)
sass (3.4.23)
test-unit (3.1.7)
user@machine:~$ sudo gem uninstall rake
ERROR:  While executing gem ... (Gem::InstallError)
    rake is not installed in GEM_HOME, try:
    gem uninstall -i /usr/share/rubygems-integration/all rake
user@machine:~$ sudo gem uninstall -i /usr/share/rubygems-integration/all rake 
Remove executables:
    rake

in addition to the gem? [Yn]  Y
ERROR:  While executing gem ... (Gem::FilePermissionError)
    You don't have write permissions for the /usr/share/rubygems-integration/all/bin directory.
user@machine:~$ ls /usr/share/rubygems-integration/all/
specifications
user@machine:~$ 

Je ne peux pas désinstaller ce bijou en particulier, ni l'utiliser 🙁
Si semble qu'elle n'existe pas.

Mon ruby verison est 2.3.1.p112