du -h --max-depth=1 # Outputs the size of all the files and folders within current folder, in human readable format.
find -size +100M # This command combination, Lists all the files/folders the size of which is 100M or more
find -type f -exec du -Sh {} + | sort -rh | head -n 5 # display the biggest file sizes only
find /dir/path/ -type f -exec du -Sh {} + | sort -rh | head -n 5
# Ctrl + R - shortcut for search in history