1. How to find files that occupy a large amount of memory
$ df -h
Displays disk information for filesystems, including their usage, free space, etc. as follows:
$ sudo du -ah | sort -rh | awk '$1~/G/{print}'Output all files that take up more than 1 GB of memory. If you want to find larger or smaller files, you can modify "G" to "M" (MB), "K" (KB) or other units accordingly.
2. How to clear ./.cache
Clearing the cache files in the ~/.cache directory may free up some disk space, but some applications may need to rebuild their caches, so make sure you understand the impact before clearing the cache.
$sudo rm -r ~/.cache/*The above command will recursively delete everything under the ~/.cache directory. NOTE: Clearing cache files may cause some applications to regenerate their caches, which may cause applications to start slower on restart or require cached data to be reloaded.