What command line command can I use to know the total size of a folder (on Linux)?

Question

Including all the files, hidden files, and subfolders. I need the total size, but also the size by subfolder like this

/folder     5.03GB
    sub1       1GB
    sub2       4GB
    file_a    20MB
    file_b    10MB

Answer 1

I was unsure tree could do it and I had to find out how on the Internet. It's tree --du -h

Comments

Can it be made to show only the cumulative size of subfolders, without showing all the subfolders' trees (like on my example in the question)?

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I think not...try https://github.com/nachoparker/dutree