see large file ubuntu tail command code example
Example 1: find large files in ubuntu
sudo du -a /your_dir/ | sort -n -r | head -n 20
Example 2: see how large a directory is linux
# du -a /home | sort -n -r | head -n 5
sudo du -a /your_dir/ | sort -n -r | head -n 20
# du -a /home | sort -n -r | head -n 5