Library install problem

Hi everyone, :slight_smile:
I have a little problem, I would like to install de ‘Ultrasonic.h’ librairie.
But, (I am on Ubuntu) in the /usr/share/arduino/librairies, I haven’t the permission to create folders and files :frowning:
How can I install this libraire ?
Thanks for advance :slight_smile: !

How can I install this libraire ?

Change the permissions on the folder.