1

I want to make a list of my subdirectories. When I execute the following for loop, the first directory name occurs two times

for d in */; do
     echo $d >> directories.txt
done

The output is like :

ONE/
TWO/
ONE/

Where is the problem?

5

Improving you current code, this command should be helpful:

for d in ./*;do [[ -d "$d" ]] && echo "$d" >> dir.txt; done

To remove the ./ from the output:

for d in ./*;do [[ -d "$d" ]] && echo "${d##./}" >> dir.txt; done
3
  • the sed wasn't working for me, so I updated it with this sed -r 's/^\.\///' – mfink Jan 24 '18 at 20:21
  • You right I missed a / at the end! Thanks for the HUD. – George Udosen Jan 25 '18 at 4:25
  • @muru I tried this for d in ./*;do [[ -d "$d" ]] && echo "${d%/}";done and it didn't give the output you suggest, this rather "${d##./}" does the job. – George Udosen Jan 25 '18 at 4:41
2

You are appending the entries (>>) where you must be overwriting them (>). It is better to use find. To find all subdirectories recursively, use

find . -type d > directories.txt

To find subdirectories only in the current directory, use

find . -type d -maxdepth 1 > directories.txt

-type d instructs find to list only directory files.

1

What surprises me is the lack of a semicolon (;) in your solution, does your problem persist when you do:

for d in *; do echo $d >> directories.txt; done

? It works for me fine. Also, are you sure you run it in bash? Finally, the ">>" might be the problem, you might be appending directories' names several times.

Not to mention that if you want to list directories only (not files) you could rather do:

for d in `find . -type d -maxdepth 1`; do echo $d >> directories.txt; done

or even simpler:

find . -type d -maxdepth 1 > directories.txt
1
  • I see 'maxdepth 1' in the other answer that just appeared. Indeed, I omitted it, adding now for consistency. – Maciek Jan 11 '18 at 7:51

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