Copy only folders not files?

Is there a way to copy an entire directory, but only the folders? I have a corrupt file somewhere in my directory which is causing my hard disks to fail.

So instead of copying the corrupt file to another hard disk, I wanted to just copy the folders, because I have scripts that search for hundreds of folders, and I don't want to have to manually create them all.

I did search the cp manual, but couldn't see anything (I may have missed it)

Say I have this structure on my failed HDD:

dir1 files dir2 files files dir4 dir3 files 

All I a want is the directory structure, not any files at all.

So I'd end up with on the new HDD:

dir1 dir2 dir4 dir3 

Hoping someone knows some tricks!

2 Answers

If you want to mirror a directory skeleton and copy no files:

find -type d -links 2 -exec mkdir -p "/path/to/backup/{}" \; 

What's going on here:

• Find is only selecting directories
• We're using -links 2 to find the deepest possible directories.
• mkdir -p will make any missing directories along the way.

I've done it like this rather than find -type d -exec mkdir -p "/path/to/backup/{}" \; because it'll cut out on a whole buttload of mkdir calls. We can quickly prove this with a little test. Here's the test tree followed by what I ran to compare the two commands:

$ tree . ├── dir1 │   ├── dir2 │   │   └── dir3 │   ├── dir7 │   └── dir8 └── dir9 └── dir0 $ pr -m -t <(find -type d) <(find -type d -links 2) . ./dir1/dir8 ./dir1 ./dir1/dir2/dir3 ./dir1/dir8 ./dir1/dir7 ./dir1/dir2 ./dir9/dir0 ./dir1/dir2/dir3 ./dir1/dir7 ./dir9 ./dir9/dir0 

And that's only going to get better in a real-word solution with thousands of directories.

Quite easily done with python one-liner:

bash-4.3$ tree . ├── ABC ├── set_pathname_icon.py ├── subdir1 │   ├── file1.abc │   └── file2.abc ├── subdir2 │   ├── file1.abc │   └── file2.abc └── subdir3 └── subdir4 └── file1.txt 4 directories, 7 files bash-4.3$ python -c 'import os,sys;dirs=[ r for r,s,f in os.walk(".") if r != "."];[os.makedirs(os.path.join(sys.argv[1],i)) for i in dirs]' ~/new_destination bash-4.3$ tree ~/new_destination /home/xieerqi/new_destination ├── subdir1 ├── subdir2 └── subdir3 └── subdir4 

As script this could be rewritten like so:

#!/usr/bin/env python import os,sys dirs=[ r for r,s,f in os.walk(".") if r != "."] for i in dirs: os.makedirs(os.path.join(sys.argv[1],i))