Move all .txt files into one directory

Question

I have almost 6000 directories with thousands of files:

all/recup_dir.1/1.txt
all/recup_dir.1/2.jpg
...
all/recup_dir.5987/1.txt
all/recup_dir.5987/2.txt
...

and I want to move all .txt files in the all/txt folder. I have used this command:

mv **/*.txt txt

but I get this error:

bash /bin/mv arg list too long

How can I do?

Solution

find solution:

find all -type f -name "*.txt" ! -path "all/txt/*" -exec echo mv -t all/txt '{}' \;

Comments

[stefan]

if you just move all .txt files from your example to a common folder, the ones with the same basenames (e.g., 1.txt) will overwrite each other. How do you want to resolve this conflict?

[xRobot]

@stefan I could rename it with 1-1.txt, 1-2.txt, 1-3.txt, ecc