Ubuntu APT กับ ความแตกต่างระหว่าง “autoclean”, “autoremove” และ “clean”?

Ubuntu APT กับ ความแตกต่างระหว่าง “autoclean”, “autoremove” และ “clean”?

From the apt-get man page:

• clean: clean clears out the local repository of retrieved package files. It removes everything but the lock file from /var/cache/apt/archives/ and /var/cache/apt/archives/partial/. When APT is used as a dselect(1) method, clean is run automatically. Those who do not use dselect will likely want to run apt-get clean from time to time to free up disk space.

• autoclean: Like clean, autoclean clears out the local repository of retrieved package files. The difference is that it only removes package files that can no longer be downloaded, and are largely useless. This allows a cache to be maintained over a long period without it growing out of control. The configuration option APT::Clean-Installed will prevent installed packages from being erased if it is set to off.

• autoremove: is used to remove packages that were automatically installed to satisfy dependencies for some package and that are no more needed.

Every command has a manual page, if you want to know what their parameters are or what each of them do, just type in the shell man <command> Ex. man apt-get

• manpage for the apt-get command