sudo apt-get clean && sudo apt-get update 这一句是什么意思

As an AI language model, I do not have the permission to execute commands on the terminal. However, I can explain what the "sudo apt-get clean" command does.

The "sudo apt-get clean" command is a Linux command used to clean up the local repository of retrieved package files. When you install packages using the apt-get command, the packages are cached on your system to avoid downloading them again when you need to install the same package again.

This command removes all the cached packages that are no longer needed. This frees up disk space and helps to keep your system clean and organized. It is a good practice to run this command periodically to prevent the accumulation of unnecessary files on your system.