问题
I need to copy all *.jar files from directory and all its subdirectories. How can I do it in UNIX/Linux terminal? Command cp -r *.jar /destination_dir doesn't work.
回答1:
rsync is useful for local file copying as well as between machines. This will do what you want:
rsync -avm --include='*.jar' -f 'hide,! */' . /destination_dir
The entire directory structure from . is copied to /destination_dir, but only the .jar files are copied. The -a ensures all permissions and times on files are unchanged. The -m will omit empty directories. -v is for verbose output.
For a dry run add a -n, it will tell you what it would do but not actually copy anything.
回答2:
If you don't need the directory structure only the jar files, you can use:
shopt -s globstar
cp **/*.jar destination_dir
If you want the directory structure you can check cp's --parents option.
回答3:
If your find has an -exec switch, and cp an -t option:
find . -name "*.jar" -exec cp -t /destination_dir {} +
If you find doesn't provide the "+" for parallel invocation, you can use ";" but then you can omit the -t:
find . -name "*.jar" -exec cp {} /destination_dir ";"
回答4:
tar -cf - `find . -name "*.jar" -print` | ( cd /destination_dir && tar xBf - )
回答5:
cp --parents `find -name \*.jar` destination/
from man cp:
--parents
use full source file name under DIRECTORY
回答6:
If you want to maintain the same directory hierarchy under the destination, you could use
(cd SOURCE && find . -type f -name \*.jar -exec tar cf - {} +) \
| (cd DESTINATION && tar xf -)
This way of doing it, instead of expanding the output of find within back-ticks, has the advantage of being able to handle any number of files.
回答7:
find . -name \*.jar | xargs cp -t /destination_dir
Assuming your jar filenames do not contain spaces, and your cp has the "-t" option. If cp can't do "-t"
find . -name \*.jar | xargs -I FILE cp FILE /destination_dir
来源：https://stackoverflow.com/questions/9622883/recursive-copy-of-specific-files-in-unix-linux