Extract one file from tarball archieve

1. extract foo.txt from foo.tar.gz

  tar -zxvf foo.tar.gz foo.txt

2. extract path/foo.txt from foo.tar.gz

  tar -zxvf foo.tar.gz path/foo.txt


3. extract path/foo.txt from foo.tar.gz to dstpath

  tar -zxvf foo.tar.gz -C dstpath path/foo.txt


3. extract path/foo.txt from foo.tar.gz to dstpath, without creating directory

  tar --transform 's/.*\///'  -zxvf foo.tar.gz -C dstpath path/foo.txt