Libérer un peu d'espace disque sur un serveur Ubuntu.

# To delete downloaded packages (.deb) already installed (and no longer needed)
$ sudo apt-get clean

# To remove all stored archives in your cache for packages that can not be downloaded anymore (thus packages that are no longer in the repository or that have a newer version in the repository).
$ sudo apt-get autoclean

# To remove unnecessary packages (After uninstalling an app there could be packages you don't need anymore), including old Linux kernels (only if Ubuntu > 16.04)
$ sudo apt-get autoremove