conda 缓存一般在 pkgs 文件夹下，虽说可以直接删除，但是这样会造成不好的影响，例如不能使用已经缓存的下载包，不同环境包不能软连接，推荐这种方式 conda clean --all
usage: conda-script.py clean [-h] [-a] [-i] [-p] [-t] [-f] [-c TEMPFILES [TEMPFILES ...]] [-d] [--json] [-q] [-v] [-y]
Remove unused packages and caches.
Options:
optional arguments:
-h, --help Show this help message and exit.
Removal Targets:
-a, --all Remove index cache, lock files, unused cache packages, and tarballs.
-i, --index-cache Remove index cache.
-p, --packages Remove unused packages from writable package caches. WARNING: This does not check for packages installed using symlinks back to the package cache.
-t, --tarballs Remove cached package tarballs.
-f, --force-pkgs-dirs
Remove *all* writable package caches. This option is not included with the --all flag. WARNING: This will break environments with packages installed using symlinks back to the package cache.
-c TEMPFILES [TEMPFILES ...], --tempfiles TEMPFILES [TEMPFILES ...]
Remove temporary files that could not be deleted earlier due to being in-use. Argument is path(s) to prefix(es) where files should be found and removed.
Output, Prompt, and Flow Control Options:
-d, --dry-run Only display what would have been done.
--json Report all output as json. Suitable for using conda programmatically.
-q, --quiet Do not display progress bar.
-v, --verbose Can be used multiple times. Once for INFO, twice for DEBUG, three times for TRACE.
-y, --yes Do not ask for confirmation.
Examples:
conda clean --tarballs